# TLP281 optocoupler module, 4 channels

> 4-channel optocoupler module based on TLP281 (Toshiba), providing galvanic isolation between INPUT and OUTPUT. INPUT voltage 3V/5V, maximum HVCC voltage 24VDC, maximum current draw 500mAh, output current equal to HVCC/5.1K. Compatible with Arduino and other development boards, suitable for safely controlling motors, relays or servomotors. Dimensions 25 x 24mm, weight 5g.

- Page: https://sigmanortec.ro/en/tlp281-optocoupler-module-4-channels
- Price: 9.11 RON
- Availability: In stock; 1-2 zile
- Reference: 9164 · EAN: 5947155375377
- Category: Electronic components > Protection Module
- Package (shipping data): 0.004 kg
- Updated: 2026-09-23
- 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

4-channel module for optical signal isolation, ideal for Arduino and other boards, allows safe control of loads at higher voltages without exposing the microcontroller to spikes and interference. Works with 3-5V inputs, switches separately powered outputs up to 24VDC, uses Toshiba TLP281 optocoupler, galvanically separates INPUT from OUTPUT for protection and stability in projects with motors, relays or servomotors.
Optocoupler, opto-isolator module, compatible with Arduino and other development boards, which transfers an electrical signal between two isolated circuits by using light. It prevents high voltages from affecting the system that receives the signal. It consists of an LED and a phototransistor in the same capsule. The electrical signal is converted into light, then it is received by the phototransistor which, in turn, generates electrical energy.
This allows a microcontroller, which uses a logic voltage of 5V to control, for example, motors or servomotors that use a higher voltage and which can generate electromagnetic interference, to be isolated electromagnetically from consumers.
The signal received on INPUT is output on OUTPUT but at a higher voltage.
Specifications:
INPUT voltage: 3V / 5V
Maximum absorption current: 500mAh
Maximum HVCC voltage (power output): 24VDC
Integrated used: Toshiba TLP281
Input channels: 4
Output channels: 4
Output current: equal to HVCC/5.1K
Weight: 5g
Dimensions mm: 25 x 24mm
Use:
Pins IN1 , IN2, IN3, IN4 and GND to Arduino GND can be connected to the IO ports of the Arduino. Each pin will control the related outputs ( IN1 control OUT1 , samd)
The plus of the device controlled on the OUTPUT pins is connected to the HVCC pin. HGND will connect to the negative of the controlled device.
When IN1 is HIGH, the corresponding output OUT1 is equal to the voltage applied to HVCC . When IN1 is LOW, OUT1 voltage is equal to HGND .