# Relays

> Electromechanical and solid state relays, optocoupler relay modules, ESP8266 kits, wireless and remote-controlled relays

- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Category page: https://sigmanortec.ro/en/relays
- Category: Electronic components > Relays
- Prices: RON, VAT included; prices and stock as of 2026-10-21 21:01 (Europe/Bucharest)

## Subcategories

- [Solid State Relays](https://sigmanortec.ro/en/llms/c/270.md): Solid state relays (SSR), single and multi-channel, 5-40A, 5V high/low level control modules (9 products)

## Products (47)

### Solid State Relay SSR-40DA, 40A
- Page: https://sigmanortec.ro/en/solid-state-relay-ssr-40da-40a
- Details: https://sigmanortec.ro/en/llms/p/1353.md
- Price: 30.56 RON
- Availability: In stock; 1-2 zile
- Reference: 9240 · EAN: 5949281969567
- Specifications: Nominal Current: 40 A; Maximum Output Current: 40; Output Type Voltage: Closed-Open Contact; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: AC; Model: SSR-40DA

Solid state relay SSR-40DA, 40A, with TRIAC output and zero crossing switching, optical isolation between input and output, status LED. Control signal 3-32VDC (3-25mA), load voltage 24-380VAC, switching time 

### Relay kit with ESP8266, ESP-01
- Page: https://sigmanortec.ro/en/relay-kit-with-esp8266-esp-01
- Details: https://sigmanortec.ro/en/llms/p/274.md
- Price: 22.98 RON
- Availability: In stock; 1-2 zile
- Reference: 33410 · EAN: 5944779801473

Relay kit with 5V relay and ESP8266 ESP-01 WiFi module mounted directly on the socket. Includes a built-in 5V-3.3V step-down converter for powering the ESP, relay controlled via GPIO0 with active LOW activation. The ESP-01 supports Station and Access Point modes, UART communication for configuration and programming. Compact solution for WiFi automation and remote control of loads, suitable for smart home and IoT projects.

### 12V relay module with light sensor
- Page: https://sigmanortec.ro/en/12v-relay-module-with-light-sensor
- Details: https://sigmanortec.ro/en/llms/p/421.md
- Price: 15.94 RON
- Availability: In stock; 1-2 zile
- Reference: 33382 · EAN: 5949920782434
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

12V relay module with an integrated light sensor (photoresistor). Powered via the VIN and GND pins at 12VDC, with a switching threshold adjustable through the onboard potentiometer. The relay has NC, COM and NO contacts and can switch loads rated AC 250V/10A or DC 30V/10A. It activates when light exceeds the set threshold and deactivates below it. Reference 33382.

### 5V relay module, High Level command
- Page: https://sigmanortec.ro/en/5v-relay-module-high-level-command
- Details: https://sigmanortec.ro/en/llms/p/422.md
- Price: 6.66 RON
- Availability: In stock; 1-2 zile
- Reference: 33339 · EAN: 5941065402024
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

5V relay module with High Level trigger, for controlling AC or DC loads in Arduino projects and automation systems. Input voltage 5V DC, output type normally open-closed contact. Supports maximum load AC 250V/10A or DC 30V/10A, trigger current 5mA, status indicator LED. Compact dimensions 50 x 26 x 18.5 mm. Compatible with Arduino.

### 5v Low Level Control Relay Module
- Page: https://sigmanortec.ro/en/5v-low-level-control-relay-module
- Details: https://sigmanortec.ro/en/llms/p/423.md
- Price: 5.45 RON
- Availability: In stock; 1-2 zile
- Reference: 22008 · EAN: 5943791377034
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Relay module with 5V DC input voltage, Low Level triggering and a trigger current of 5mA. Output type is open-close contact, supporting loads up to AC 250V/10A or DC 30V/10A. Includes a status LED for visual verification and is compatible with Arduino. Dimensions: 50 x 26 x 18.5mm. Reference 22008.

### Relay module with delay, HCW-M421, adjustable time, display, 6–30V
- Page: https://sigmanortec.ro/en/delay-relay-module-adjustable-time-display-6-30v
- Details: https://sigmanortec.ro/en/llms/p/424.md
- Price: 18.98 RON
- Availability: In stock; 1-2 zile
- Reference: 33573 · EAN: 5949412377865
- Specifications: Supply Voltage: 6; Maximum Input Voltage: 30; Output Type Voltage: Closed-Open Contact; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Delay relay timer module with adjustable time, digital display, powered via 5V MicroUSB or 6-30VDC through screw terminals. Selectable time resolution (0-99.9s, 0-999s, 0-999min), 4 operating modes (delay, pulse, ON/OFF cycle). 5A relay output for DC or AC loads, closed-open contact type. Signal trigger High Level 3-24V. Dimensions 62 x 38 x 17mm.

### 16-channel relay with remote control, 12V, 315MHz
- Page: https://sigmanortec.ro/en/16-channel-relay-with-remote-control-12v-315mhz
- Details: https://sigmanortec.ro/en/llms/p/589.md
- Price: 213.31 RON
- Availability: Out of stock
- Reference: R-33126 · EAN: 5946523192356
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 12 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

16-channel relay module controlled wirelessly via a 315MHz remote control, powered at 12 VDC, with closed-open contact output type. Pairs using the learn function and supports up to 7A per channel. Offers 3 operating modes: jog (activation while button held), latched (on-off) and toggle (interlock between channels). Suitable for automation, control panels and DIY projects.

### Relay 12V 250VAC 10A, 5 pins
- Page: https://sigmanortec.ro/en/relay-12v-250vac-10a-5-pins
- Details: https://sigmanortec.ro/en/llms/p/590.md
- Price: 3.84 RON
- Availability: In stock; 1-2 zile
- Reference: 33296 · EAN: 5946725398884
- Specifications: Nominal Current: 10 A; Output Type Voltage: Closed-Open Contact; Input Voltage: 12 VDC; Output Voltage: 250 VAC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: AC

SRD-12VDC-SL-C relay with a 12VDC coil and 5 alignable pins for PCB mounting. The contacts support a maximum load of 10A at 250VAC/125VAC/30VDC/28VDC, with normally closed-open contact type. Compact construction, suitable for switching loads in automation and electronics projects, for both industrial and hobby applications.

### Delay relay NE555 12V 0-10S
- Page: https://sigmanortec.ro/en/delay-relay-ne555-12v-0-10s
- Details: https://sigmanortec.ro/en/llms/p/591.md
- Price: 8.12 RON
- Availability: In stock; 1-2 zile
- Reference: 33124 · EAN: 5946794336718
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 12 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Delay relay module based on the NE555 timer, powered by 12VDC, with delay adjustable via potentiometer from 0 to 10 seconds. It has an LED to indicate the input signal and switches loads at 220VAC up to 10A (maximum 2000W). The output is an open-close contact type, useful for delayed on/off switching in automation projects.

### 4-channel solid state relay, High Level, 5V, SSR
- Page: https://sigmanortec.ro/en/4-channel-solid-state-relay-high-level-5v-ssr
- Details: https://sigmanortec.ro/en/llms/p/592.md
- Price: 40.78 RON
- Availability: Out of stock
- Reference: 33125 · EAN: 5949521165636
- Specifications: Input Voltage: 5VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

4-channel solid state relay (SSR) module with High Level triggering, for controlling AC loads in microcontroller projects. Switches up to 250VAC and 2A per channel. Power supply 5VDC, current draw 160mA. Logic input: OFF state 0-2.5VDC, ON state 3-5VDC. Reference 33125.

### Solid State Relay 5V, 1 channel, Low Level, SSR
- Page: https://sigmanortec.ro/en/solid-state-relay-5v-1-channel-low-level-ssr
- Details: https://sigmanortec.ro/en/llms/p/593.md
- Price: 12.10 RON
- Availability: In stock; 1-2 zile
- Reference: 22128 · EAN: 5943846141573
- Specifications: Input Voltage: 5VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Solid State Relay (SSR) module with 1 channel, low level control, powered by 5VDC, 160mA. Switches AC loads up to 250VAC, 2A. Signal threshold: OFF state 0-2.5VDC, ON state 3-5VDC. Dimensions 24 x 32 x 21 mm. Suitable for controlling AC loads in Arduino projects or automation. Reference 22128, EAN 5943846141573.

### Solid State Relay 5V 2CH Low Level, SSR
- Page: https://sigmanortec.ro/en/solid-state-relay-5v-2ch-low-level-ssr
- Details: https://sigmanortec.ro/en/llms/p/594.md
- Price: 22.66 RON
- Availability: In stock; 1-2 zile
- Reference: 22129 · EAN: 5941822295395
- Specifications: Input Voltage: 5VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

2-channel solid state relay (SSR) module, Low Level type, for controlling AC loads in Arduino projects, automation and industrial control. Input voltage: 5VDC (DC), consumption 160mA. Signal: OFF state 0-2.5VDC, ON state 3-5VDC. Rating: 250VAC, 2A per channel. Dimensions: 53 x 32 x 23 mm. Reference 22129, EAN 5941822295395.

### Relay SRD-03VDC-SL-C
- Page: https://sigmanortec.ro/en/relay-srd-03vdc-sl-c
- Details: https://sigmanortec.ro/en/llms/p/595.md
- Price: 4.05 RON
- Availability: In stock; 1-2 zile
- Reference: 33340 · EAN: 5946111144798
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 3VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Relay SRD-03VDC-SL-C, compact 5-pin relay for PCB mounting. The coil operates at an input voltage of DC 3VDC. It supports a maximum load of 10A at 250VAC, 125VAC, 30VDC or 28VDC. The contacts are of the closed-open type, and the standard form factor allows easy integration into boards and modules for switching loads in electronic projects and automation.

### Relay SRD-05VDC-SL-C
- Page: https://sigmanortec.ro/en/relay-srd-05vdc-sl-c
- Details: https://sigmanortec.ro/en/llms/p/596.md
- Price: 4.96 RON
- Availability: In stock; 1-2 zile
- Reference: 22081 · EAN: 5943127081598
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

SRD-05VDC-SL-C relay with 5 pins for PCB mounting. Input voltage 5 VDC (DC type), output with closed-open contact type. Maximum switching capacity 10A at 250VAC/125VAC/30VDC/28VDC. Suitable for automation and load control in industrial or DIY applications, easy to integrate into circuits.

### Solid State Relay, 5V, 2CH, High Level, SSR
- Page: https://sigmanortec.ro/en/solid-state-relay-5v-2ch-high-level-ssr
- Details: https://sigmanortec.ro/en/llms/p/900.md
- Price: 10.93 RON
- Availability: Out of stock
- Reference: 9098 · EAN: 5940769641081
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Dual-channel Solid State Relay (SSR) module, High Level triggering, activation signal 3-5VDC (OFF state 0-2.5VDC), compatible with 3.3V and 5V logic level boards such as Arduino. Switches AC loads up to 250VAC and 2A per channel. Power supply 5VDC, consumption 160mA. Dimensions 53 x 32 x 23 mm. Reference 9098.

### Optocoupler relay module, 1 channel, 12V, 30A, adjustable level
- Page: https://sigmanortec.ro/en/optocoupler-relay-module-1-channel-12v-30a-adjustable-level
- Details: https://sigmanortec.ro/en/llms/p/1005.md
- Price: 19.23 RON
- Availability: In stock; 1-2 zile
- Reference: 9197 · EAN: 5940582061714
- Specifications: Maximum Output Current: 30; Output Type Voltage: Closed-Open Contact; Input Voltage: 12 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Optocoupler relay module, 1 channel, for controlling power loads in industrial or DIY projects. Optical isolation protects the control signal, NO relay rated 30A (16A recommended), rating 240VAC. Supply/signal voltage 12VDC, High/Low Level trigger selectable via jumper. Green LED (power) and red LED (relay status). Dimensions 50 x 33 x 24mm, weight 36g, mounting holes spaced 44.5 x 27.5mm.

### SONOFF v.R2 wireless relay, 1 channel, new version
- Page: https://sigmanortec.ro/en/sonoff-vr2-wireless-relay-1-channel-new-version
- Details: https://sigmanortec.ro/en/llms/p/1231.md
- Price: 58.09 RON
- Availability: Out of stock
- Reference: R-9215 · EAN: 5941519169183

Remotely control lighting or other equipment ON/OFF via the eWeLink app, with voice commands via Google Home and Alexa, plus Siri integration via Raspberry bridge. Provides real-time status feedback and access from anywhere via 2.4GHz. Supports up to 10A and 2200W, low standby power consumption, flame-resistant ABS housing and user sharing function.
SONOFF relay version R2, with one channel, is the improved version of the standard model.
This relay allows remote control via eWeLink, Google Home, Alexa and Siri (only by using a Raspberry board as a bridge between eWeLink and Apple Home).
You can connect a multitude of devices that can be controlled by turning ON/OFF.

### 8-channel relay module, with optocoupler, low level, 12V
- Page: https://sigmanortec.ro/en/8-channel-relay-module-with-optocoupler-low-level-12v
- Details: https://sigmanortec.ro/en/llms/p/1352.md
- Price: 35.48 RON
- Availability: In stock; 1-2 zile
- Reference: 9239 · EAN: 5943989575952
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

8-channel relay module with optocoupler for isolation, active low inputs (IN1-IN8) at 12VDC. Relays rated 10A/250VAC, screw terminals NC/NO/COM per channel, grouped power and signal pins. Dimensions 138 x 56 x 18.5mm, 4 mounting holes with 3.1mm diameter. Requires removing the VCC/JD-VCC jumper to supply 12VDC.

### Solid State Relay 5V, 1 channel, High Level, SSR
- Page: https://sigmanortec.ro/en/solid-state-relay-5v-1-channel-high-level-ssr
- Details: https://sigmanortec.ro/en/llms/p/1369.md
- Price: 18.30 RON
- Availability: In stock; 1-2 zile
- Reference: 9256 · EAN: 5946547669179
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 V

Solid state relay (SSR) module with 1 channel, 5V input voltage, High Level trigger. Switches AC loads up to 250VAC and 2A, powered at 5VDC with 160mA. Signal threshold: OFF state 0-2.5VDC, ON state 3-5VDC. Output type: Closed-Open contact. Dimensions: 24 x 32 x 21 mm.

### 4-channel solid state relay, Low Level, 5V, SSR
- Page: https://sigmanortec.ro/en/4-channel-solid-state-relay-low-level-5v-ssr
- Details: https://sigmanortec.ro/en/llms/p/1374.md
- Price: 40.61 RON
- Availability: In stock; 1-2 zile
- Reference: 9266 · EAN: 5940804424013
- Specifications: Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

4-channel solid state relay (SSR) module with Low Level trigger, powered by 5V DC (160mA). Each channel supports up to 250VAC and 2A, for controlling AC loads in Arduino projects or automation setups, with direct control from GPIO. Signal thresholds: ON state 0-2.5VDC, OFF state 3-5VDC.

### 16-channel relay with remote control, 12V, 433MHz
- Page: https://sigmanortec.ro/en/16-channel-relay-with-remote-control-12v-433mhz
- Details: https://sigmanortec.ro/en/llms/p/1462.md
- Price: 213.31 RON
- Availability: In stock; 1-2 zile
- Reference: 9356 · EAN: 5946452719709
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

16-channel relay with 433MHz wireless remote control, quick pairing via the learn function. Input voltage 12V DC, output type open/closed contact, maximum load 7A per channel. Supports 3 operating modes: jog, latched and toggle. The remote uses a type 23A battery (not included). Ref. 9356.

### Relay module with optocoupler, High or Low level selectable, 1 channel, 5V
- Page: https://sigmanortec.ro/en/relay-module-with-optocoupler-high-or-low-level-selectable-1-channel-5v
- Details: https://sigmanortec.ro/en/llms/p/1472.md
- Price: 9.08 RON
- Availability: In stock; 1-2 zile
- Reference: 9366 · EAN: 5948372588670
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Relay module with optocoupler, 1 channel, supply and logic voltage 5VDC, HIGH or LOW trigger level selectable via jumper, trigger current 5mA. Relay rated 250VAC/10A or 30VDC/10A, with NO, COM, NC terminals. Two LEDs indicate power and active state. Compatible with Arduino and other development boards. Dimensions: 50 x 26mm.

### Relay module with optocoupler, High or Low level selectable, 2 channels, 5V
- Page: https://sigmanortec.ro/en/relay-module-with-optocoupler-high-or-low-level-selectable-2-channels-5v
- Details: https://sigmanortec.ro/en/llms/p/1473.md
- Price: 14.00 RON
- Availability: Out of stock
- Reference: 9367 · EAN: 5942891203915
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Relay module with 2 channels and optocoupler isolation, trigger level selectable as High or Low via jumper. Supply and logic voltage 5VDC, trigger current 5mAh. Relays rated 250VAC/10A or 30VDC/10A, dimensions 50 x 26mm. Green LED indicates power, red LED indicates activation. Compatible with Arduino and other development boards.

### Optocoupler relay module, 1 channel, 5V, 30A, adjustable level
- Page: https://sigmanortec.ro/en/optocoupler-relay-module-1-channel-5v-30a-adjustable-level
- Details: https://sigmanortec.ro/en/llms/p/1502.md
- Price: 20.09 RON
- Availability: In stock; 1-2 zile
- Reference: 9395 · EAN: 5947412844882
- Specifications: Maximum Output Current: 30 A; Output Type Voltage: Closed-Open Contact; Input Voltage: 5VDC

Optocoupler relay module, 1 channel, for controlling loads from Arduino, ESP32 or PLC. Supply voltage 5VDC, signal 3.3-5VDC, NO (Normally Open) contact, rating 240VAC, maximum current 30A (16A recommended). Trigger level selectable High/Low via jumper. Green LED for power, red LED for relay status. Dimensions 50 x 33 x 24mm, weight 36g, mounting holes 44.5 x 27.5mm.

### Solid State Relay SSR-25DA, 25A
- Page: https://sigmanortec.ro/en/solid-state-relay-ssr-25da-25a
- Details: https://sigmanortec.ro/en/llms/p/1531.md
- Price: 20.34 RON
- Availability: In stock; 1-2 zile
- Reference: 9449 · EAN: 5943574862214
- Specifications: Maximum Output Current: 25 A; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: AC

Solid state relay SSR-25DA, 25A, with DC input 3-32VDC and AC output 24-380VAC. Contactless switching using TRIAC and zero crossing, optical isolation between input and output, switching time 

### Relay module with remote control, 1 channel, 433MHz, 12VDC
- Page: https://sigmanortec.ro/en/relay-module-with-remote-control-1-channel-433mhz-12vdc
- Details: https://sigmanortec.ro/en/llms/p/1550.md
- Price: 51.46 RON
- Availability: In stock; 1-2 zile
- Reference: 9453 · EAN: 5949279076253
- Specifications: tension: AD; Output Type Voltage: Closed-Open Contact; Input Voltage: 12 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Quickly control electrical consumers remotely with a 1-channel 433MHz relay, powered at 12VDC and delivered in a compact box. It offers ON OFF or momentary control, plus delayed mode, via a remote control with two buttons A and B. The relay contacts support up to 10A at 250VAC, the working range can reach 50 m in ideal conditions.
The module with a 12VDC remote control relay and a remote control, which operates at a frequency of 433MHz. It is accompanied by a plastic box and the remote control has two buttons, A and B. The two buttons can be used to activate/deactivate the relay.
The remote control requires two CR2016 batteries to operate (not included).

### Relay module with IR remote control, 12V, 1 channel
- Page: https://sigmanortec.ro/en/relay-module-with-ir-remote-control-12v-1-channel
- Details: https://sigmanortec.ro/en/llms/p/1565.md
- Price: 29.84 RON
- Availability: In stock; 1-2 zile
- Reference: 9458 · EAN: 5947625813736
- Specifications: Input Voltage: 12 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Quickly control the power supply of a consumer via IR remote control, ideal for simple automation at 12V. Offers 1 channel with ON OFF control at 38 kHz, actuation up to 8 m, standard NC NO COM outputs for easy integration and 10A relay for AC or DC loads. Compact, easy to mount in electronic and industrial projects.
Relay module actuated by infrared remote control, powered at 12VDC, 1 channel.
The remote control uses the integrated UPD6122 and NED decoding format at a frequency of 38K. This controls the ON or OFF state of the relay.
The relay has standard output NC, NO and COM.
Specifications:
Supply voltage: 12VDC
Remote control power supply: CR2025 (battery not included) …

### Relay module with IR remote control, 5V, 1 channel
- Page: https://sigmanortec.ro/en/relay-module-with-ir-remote-control-5v-1-channel
- Details: https://sigmanortec.ro/en/llms/p/1610.md
- Price: 36.28 RON
- Availability: In stock; 1-2 zile
- Reference: 9548 · EAN: 5949567125243
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Quickly control an electrical consumer via IR remote control, ideal for automation and DIY projects, operates at 5VDC and switches ON or OFF from up to 8 m, 10A relay with NO, NC and COM contacts for easy integration, NED decoding at 38 kHz for stable control.
Relay module actuated by infrared remote control, powered at 5VDC, 1 channel.
The remote control uses the integrated UPD6122 and NED decoding format at a frequency of 38K. This controls the ON or OFF state of the relay.
The relay has standard output NC, NO and COM.
Specifications:
Supply voltage: 5VDC
Remote control power supply: CR2025 (battery not included)
Maximum operating distance: 8 meters
Channels: 1 …

### GSM relay module, gate opener, G202 Plus, 9-24V, 4G
- Page: https://sigmanortec.ro/en/gsm-relay-module-gate-opener-g202-plus-9-24v-4g
- Details: https://sigmanortec.ro/en/llms/p/1650.md
- Price: 380.29 RON
- Availability: In stock; 1-2 zile
- Reference: 88188 · EAN: 5940273386232
- Specifications: Supply Voltage: 9; Maximum Input Voltage: 24; Output Type Voltage: Closed-Open Contact; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Model: G202 Plus

GSM relay module for opening gates and remote control of equipment, activated by free call or SMS, works on the 4G network and is easily configured with SMS commands, allows authorization of up to 999 users for secure access, has relay with COM NC NO contacts, removable external antenna and DIN rail mounting.
Relay module with remote control via GSM that can be used to open gates, doors or to remotely control any kind of device or equipment.
The module is the 4G version , different from the standard version that only supports the 2G network.
The relay is activated by direct call to the card installed in the module or by SMS message.

### 5V relay module, serial control from PC, USB, CH340
- Page: https://sigmanortec.ro/en/5v-relay-module-serial-control-from-pc-usb-ch340
- Details: https://sigmanortec.ro/en/llms/p/1750.md
- Price: 28.75 RON
- Availability: In stock; 1-2 zile
- Reference: 9641 · EAN: 5942133164974
- Specifications: Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

5V relay module (ref. 9641) with serial control from a PC via USB, based on the CH340 chip. Powered directly from USB and controlled using serial debugging software at 9600 baud via hex frames (e.g. A0 01 01 A2 for ON). Features a status LED, 5V logic voltage, USB male 2.0 interface. Relay contacts rated up to 250VAC 10A (5A max recommended).

### Electromagnetic relay, LY2N, 12V, 10A, 8 pins, with socket, rail mount
- Page: https://sigmanortec.ro/en/electromagnetic-relay-ly2n-12v-10a-8-pins-with-socket-rail-mount
- Details: https://sigmanortec.ro/en/llms/p/1753.md
- Price: 16.42 RON
- Availability: In stock; 1-2 zile
- Reference: 9643 · EAN: 5946651438494
- Specifications: Nominal Current: 10 A; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Mounting type: Sina DIN

Electromagnetic relay LY2N, 12V DC coil, rated current 10A, switching capacity 10A/250VAC, 8 pins (2 NO, 2 NC), supplied with socket, DIN rail mount. Coil power 1.2W, operate/reset time 20ms, mechanical/electrical frequency 18,000 cycles/hour, dimensions 27.5 x 21 x 35.3mm. Intended for industrial automation and electrical panels.

### Thermal relay module, 1 channel, temperature sensor, 5V
- Page: https://sigmanortec.ro/en/thermal-relay-module-1-channel-temperature-sensor-5v
- Details: https://sigmanortec.ro/en/llms/p/1775.md
- Price: 14.96 RON
- Availability: In stock; 1-2 zile
- Reference: 9665 · EAN: 5948808534349
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Thermal relay module with 1 channel, combines an NTC sensor with an SPDT relay to automatically switch devices on or off based on temperature. Powered by 5V DC, with a potentiometer for threshold adjustment, COM/NO/NC output and a status LED. Switches up to 10A at 250VAC or 30VDC. Thermistor measuring range -10°C...+80°C, accuracy ±0.5°C. Dimensions 50 x 26mm.

### Off delay relay module, QF-RD21F, settable 0.5s-300minute , 100-220VAC, with trigger
- Page: https://sigmanortec.ro/en/off-delay-relay-module-qf-rd21f-settable-05s-300minute-100-220vac-with-trigger
- Details: https://sigmanortec.ro/en/llms/p/1782.md
- Price: 44.95 RON
- Availability: In stock; 1-2 zile
- Reference: 9671 · EAN: 5947551558329
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 100 - 220 VAC; Input Voltage Type: AC

Off delay relay module QF-RD21F, with adjustable delay time between 0.5s and 300minute, power supply 100-220VAC. Requires a trigger signal to operate and connects between power supply and load. Output contact type Closed-Open, with LED indicator for status and timing. Dimensions 88 x 36mm. Suitable for fans (compatible 110-250VAC, 2-wire) for delayed shutoff after use.

### 1-channel relay module, 3.3V, Low Level
- Page: https://sigmanortec.ro/en/1-channel-relay-module-33v-low-level
- Details: https://sigmanortec.ro/en/llms/p/1791.md
- Price: 11.48 RON
- Availability: In stock; 1-2 zile
- Reference: 9805 · EAN: 5942575544822
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 3.3 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

1-channel relay module with 3.3V DC input voltage, Low Level triggering (relay activates when the signal is pulled to GND). Compatible with ESP32, ESP8266 boards and PIC, AVR, DSP, ARM MCUs. Includes status and power LEDs, screw terminals on the relay (COM, NC, NO) and 2.54mm pins for power/signal. Dimensions: 44 x 27mm.

### 4 relay expansion board, UNO R3 and MEGA2560, 5V
- Page: https://sigmanortec.ro/en/4-relay-expansion-board-uno-r3-and-mega2560-5v
- Details: https://sigmanortec.ro/en/llms/p/1843.md
- Price: 27.75 RON
- Availability: Out of stock
- Reference: 9722 · EAN: 5944323989138
- Specifications: Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

4 relay shield for Arduino UNO R3 and MEGA2560, mounts directly on the board without extra cables and keeps access to the board pins. Operating voltage 5VDC, HIGH level activation, uses pins 4-7. Each relay has NO, NC and COM terminals plus a status LED. Dimensions 69.1 x 53.3mm. Avoid contact between the relay and the USB connector on UNO R3.

### Programmable relay, 4CH, 24V, USB serial control
- Page: https://sigmanortec.ro/en/programmable-relay-4ch-24v-usb-serial-control
- Details: https://sigmanortec.ro/en/llms/p/1881.md
- Price: 55.71 RON
- Availability: In stock; 1-2 zile
- Reference: 9748 · EAN: 5941084811418
- Specifications: Input Voltage: 24 V

4-channel relay module for automation and DIY projects, controlled directly from PC via USB, uses HID interface and does not require drivers on Windows 7 and XP, switches loads up to 10A at 250VAC or 30VDC, 24VDC relay power supply with jack or terminal, NC COM NO screw terminals and status LEDs for each channel.
The 4-channel relay module, with USB switching, directly compatible with PC. The module is intended for automation applications that require control via the computer's USB interface.
This module uses HID (Human Interface Device) technology similar to keyboards, which means that it does not require drivers to work.

### 5V relay module, 8 channels, with optocoupler, High and Low trigger settable
- Page: https://sigmanortec.ro/en/5v-relay-module-8-channels-with-optocoupler-high-and-low-trigger-settable
- Details: https://sigmanortec.ro/en/llms/p/1882.md
- Price: 53.93 RON
- Availability: In stock; 1-2 zile
- Reference: 9749 · EAN: 5945506343150
- Specifications: Input Voltage: 5 V

5V relay module with 8 channels, isolated via SMD optocoupler for protection against interference and overvoltage. Each channel has a jumper-selectable High or Low trigger, with NO, COM, NC terminals per relay. Maximum load AC 250V/10A, DC 30V/10A. Requires external 5V supply to power the coils, red LED indicates activation. Compatible with Arduino and other 5V development boards.

### Electromagnetic relay, LY2N, 24V, 10A, 8 pins, with socket, rail mount
- Page: https://sigmanortec.ro/en/electromagnetic-relay-ly2n-24v-10a-8-pins-with-socket-rail-mount
- Details: https://sigmanortec.ro/en/llms/p/1978.md
- Price: 16.07 RON
- Availability: Out of stock
- Reference: 6001 · EAN: 5946466572383
- Specifications: Nominal Current: 10 A; Input Voltage: 24VDC; Mounting type: Sina DIN

Electromagnetic relay LY2N with 24VDC coil, supplied with socket and DIN rail mount. It has 8 pins, including 2 normally open and 2 normally closed contacts, switching capacity 10A at 250VAC, coil power 1.2W. Dimensions 27.5 x 21 x 35.3mm. Intended for industrial automation and control panels to switch motors, solenoids or lighting.

### DC current detection relay module, with display, 12V, 0-10A
- Page: https://sigmanortec.ro/en/dc-current-detection-relay-module-with-display-12v-0-10a
- Details: https://sigmanortec.ro/en/llms/p/1980.md
- Price: 45.21 RON
- Availability: In stock; 1-2 zile
- Reference: 9978 · EAN: 5946082437523
- Specifications: Maximum Output Current: 10 A; Output Type Voltage: Closed-Open Contact; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

DC current detection module with display and integrated relay, supply voltage 12VDC. Measuring range 0-10A, resolution 0.01A, standby current ~20mA. The relay can switch a DC load up to 5A, with configurable thresholds (I1, I2) and several operating modes (P-11...P-52). Includes error calibration and display shutoff for reduced power consumption. Ref. 9978.

### 8-channel relay module, with optocoupler, low level, 5V
- Page: https://sigmanortec.ro/en/8-channel-relay-module-with-optocoupler-low-level-5v
- Details: https://sigmanortec.ro/en/llms/p/2013.md
- Price: 33.64 RON
- Availability: In stock; 1-2 zile
- Reference: 77006 · EAN: 5947509386943
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 5VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

8-channel relay module with optocoupler, 5VDC power and logic supply, Low Level, Active Low triggering on IN1-IN8 pins. NC, NO and COM contacts on screw terminals, rated up to 250VAC and 10A. Dimensions 138 x 56 x 18.5mm, 4 mounting holes with 3.1mm diameter. Reference 77006.

### Solid State Relay, SSR-25DD, 25A, 5-200VDC
- Page: https://sigmanortec.ro/en/solid-state-relay-ssr-25dd-25a-5-200vdc
- Details: https://sigmanortec.ro/en/llms/p/2037.md
- Price: 37.81 RON
- Availability: In stock; 1-2 zile
- Reference: 9841 · EAN: 5949500303653
- Specifications: Minimum Output Voltage: 5 V; Maximum Output Voltage: 200 V; Maximum Output Current: 25 A; Output Type Voltage: Closed-Open Contact; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

SSR-25DD solid state relay, DC-DC type, for switching direct current loads. Control voltage (input) 3-32VDC, switching voltage (output) 5-200VDC, maximum current 25A. No mechanical contacts, with status LED and photocoupler isolation. Dielectric strength 2500VAC/1 minute, operating temperature -20°C to 80°C, dimensions 60x45x23mm.

### Water level control relay module, 9-12V, automatic
- Page: https://sigmanortec.ro/en/water-level-control-relay-module-9-12v-automatic
- Details: https://sigmanortec.ro/en/llms/p/2106.md
- Price: 38.90 RON
- Availability: In stock; 1-2 zile
- Reference: 9938 · EAN: 5948664340863
- Specifications: Supply Voltage: 9; Maximum Input Voltage: 12; Output Type Voltage: Closed-Open Contact; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Water level control relay module (ref. 9938), operates automatically at 9-12V AC or DC. Uses 3 electrodes (GND, minimum level, maximum level) to detect liquid level and drive a relay with open-close contact output, rated up to 10A, controlling power of 0-1KW at 220V. Features screw terminals for quick wiring without soldering. Board dimensions: 60 x 50 x 25 mm.

### Programmable relay, 4CH, 5V, USB serial control
- Page: https://sigmanortec.ro/en/programmable-relay-4ch-5v-usb-serial-control
- Details: https://sigmanortec.ro/en/llms/p/2129.md
- Price: 54.39 RON
- Availability: In stock; 1-2 zile
- Reference: 9959 · EAN: 5940043305319
- Specifications: Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

4-channel 5V relay module controlled via USB (Type-B) using HID interface, driverless, compatible with Windows 7/XP 32/64-bit. Control IC ATMega 8A, relay IC ULN2803, Songle 5V relays, rating 250V 10A AC / 30V 10A DC. COM/NC/NO terminals per channel, status LEDs (green/red). Requires external 5VDC supply to operate relays. Dimensions 72x66mm.

### Programmable relay, 4CH, 12V, USB serial control
- Page: https://sigmanortec.ro/en/programmable-relay-4ch-12v-usb-serial-control
- Details: https://sigmanortec.ro/en/llms/p/2130.md
- Price: 57.93 RON
- Availability: In stock; 1-2 zile
- Reference: 9960 · EAN: 5945620372739
- Specifications: Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Programmable 4-channel relay module controlled via USB (HID, no drivers required), compatible with Windows 7/XP 32/64-bit. Relay voltage 12VDC, logic supply 5VDC via USB, COM/NC/NO contacts on screw terminals. Control IC ATMega 8A, relay driver IC ULN2803, Songle 12V relays, rating 250V/10A AC and 30V/10A DC. Green/red LED status indicators. Dimensions 72 x 66mm. Relay states are retained while 12V power is connected.

### Access control module, NFC, RFID and Fingerprint, 2 channels, 10-120VDC
- Page: https://sigmanortec.ro/en/access-control-module-nfc-rfid-and-fingerprint-2-channels-10-120vdc
- Details: https://sigmanortec.ro/en/llms/p/2195.md
- Price: 297.58 RON
- Availability: In stock; 1-2 zile
- Reference: 88041 · EAN: 5948447589854
- Specifications: Supply Voltage: 10; Maximum Input Voltage: 120; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Access control module with authentication via fingerprint, 13.56MHz IC card or NFC phone (ref. 88041). Powered by 10-120VDC, stores 100 cards and 50 fingerprints, 2 integrated relays with support for an optional third relay. Offers 10 configurable operating modes, programmable activation times and a 3V auxiliary output. The fingerprint reader has a resolution of 120x120 and is not water resistant.

### Bluetooth proximity switch module, with relay, XY-MB02YF, 5V
- Page: https://sigmanortec.ro/en/bluetooth-proximity-switch-module-with-relay-xy-mb02yf-5v
- Details: https://sigmanortec.ro/en/llms/p/2432.md
- Price: 74.51 RON
- Availability: In stock; 1-2 zile
- Reference: 88253 · EAN: 5944778073154
- Specifications: Model: XY-MB02YF; Communication interface: Bluetooth; Supply voltage: 5 V; Output type: Releu

Smart proximity switch with Bluetooth BLE, automatically activates a bistable relay when the phone connects and turns off the load after leaving range or disabling Bluetooth. Works without an app, compatible with iOS and Android, has very low power consumption thanks to the latching relay, supports control of up to 10A, and allows advanced settings via AT commands over UART.
The XY-MB02YF module is an intelligent proximity switch that automatically detects the user’s presence via a Bluetooth connection and operates a bistable (latching) relay to control a load circuit.

### 4 relay module with remote control, 12V, 433Mhz, programmable
- Page: https://sigmanortec.ro/en/4-relay-module-with-remote-control-12v-433mhz-programmable
- Details: https://sigmanortec.ro/en/llms/p/813.md
- Price: 67.97 RON
- Availability: In stock; 1-2 zile
- Reference: 9005 · EAN: 5940935125476
- Specifications: tension: AD; Output Type Voltage: Closed-Open Contact; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

4-channel relay module for remote control, 12V DC supply, includes a 433Mhz remote control. Uses a decoder with chip 2272 and supports momentary, ON/OFF or latched operating modes, plus mixed channel modes. Comes with a plastic case for mounting, dimensions 170 x 110 x 50mm. The remote's battery, type 23A 12V, is not included. Output is a closed-open contact type.