250V/10A 4 Channel SPDT Power Relay Module 5V Control for DIY PIC AVR DSP ARM MCU Arduino

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  • Regular price $6.19

This 4-channel 5V control Single-Pole Double-Throw (SPDT) AC power relay board can be controlled directly via a microcontroller and each channel can switch up to 10 amperes at 250 VAC. Inputs are isolated with an optocoupler to protect any delicate control circuitry.

The default state of the relays when the power is off for COMM (power) to be connected to NC (Normally Closed). This is the equivalent of setting the relay board IN pin to HIGH (has +5v sent to it).

When you have power connected to the relay's NO (Normally Open) connector and you set the corresponding IN pin to LOW (0V, or Ground), power will flow in from the COMM connector and out of the NO connector powering your device.


  • Polarity: Active Low - you must ground the control input to switch this device ON
  • Relay Max Switching Voltage: 250 Volts AC, 30VDC
  • Relay Max Switching: Current: 10 Amps AC and DC
  • Relay Control Voltage: 5.0V directly via microcontroller (Arduino, AVR, PIC, ARM, BoardX, Raspberry Pi, MSP430, etc)
  • Relay Control Current: 50-60 mA per channel
  • Each channel's red LED (IN1 - IN4) illuminates when the control pin is pulled low (relay is activated)
  • Size: 76mm x 56mm x 17mm (3.0 x 2.2 x 0.67 inches) L x W x H
  • Weight: 60g

You can find a tutorial for using relays with an Arduino microcontroller at https://envistia.info/arduino-relay-tutorial/.

Package Includes:

1X 4-channel 5V SPDT 10A/250VAC power relay board
Specifications and usage documentation

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