# Optocoupler relay module, 1 channel, 5V, 30A, adjustable level

> 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.

- Page: https://sigmanortec.ro/en/optocoupler-relay-module-1-channel-5v-30a-adjustable-level
- Price: 20.09 RON
- Availability: In stock; 1-2 zile
- Reference: 9395 · EAN: 5947412844882
- Category: Electronic components > Relays
- Specifications: Maximum Output Current: 30 A; Output Type Voltage: Closed-Open Contact; Input Voltage: 5VDC
- Package (shipping data): 0.035 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Description

Ideal for controlling large loads from Arduino, ESP32 or PLC, this optocoupler relay module provides isolation between logic and power for safer control. It supports up to 30A at 240VAC, accepts 3.3-5V signal and allows setting the trigger to High or Low via jumper. It has a green LED for power and a red LED for relay status, plus mounting holes for easy attachment.
Relay module with optocoupler, one channel, High or Low Level actuation, 5V and 30A.
This relay is NO (Normally Open), i.e. Normally Open and differs from other relay modules due to the optocoupler and the possibility of setting the trigger at High or Low level via a jumper.
It has two status indicator LEDs: Green to signal power, Red to indicate relay status.
It has 3.1mm screw mounting holes, 4 in total, at a distance of 44.5 x 27.5mm
Specifications:
Supply voltage: 5VDC
Signal Voltage: 3.3 - 5VDC
Standby consumption: 5mA
Work consumption: 190mA
Relay trip current: 2 - 4mA
Relay rating: 240VAC
Current: 30A Maximum, 16A recommended
Action: Low Level - High Level, selectable by positioning the jumper in the appropriate position
Weight: 36g
Dimensions mm: 50 x 33 x 24mm
Pins:
Power pin: DC+
Minus pin: DC-
Signal pin: IN
Voltage pin: JD+
Negative voltage pin: JD-
Details:
* The instructions in the image are informative. The model in the image differs from the marketed model.