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SainSmart 8-Channel Signal Relay Module for Arduino UNO MEGA2560 R3 Raspberry Pi


Availability: In stock

  • 8 Signal RELAY
  • Interface definition:
  • IN(x): High level. Low level cut-off
  • This item has been assembled,
  • Led indicator for each relay.





  • 8 Signal RELAY
  • Interface definition:
  • IN(x): High level. Low level cut-off
  • This item has been assembled,
  • Led indicator for each relay.
  • FR-4 Fiber glass PCB ( Double Layer ).
  • PCB thickness: 1.6mm.
  • Size: 103 x 51 x 16 mm .
  • Power Supply: 5V DC / 70mA (relay all ON).

Input control signal voltage:  

  • 0V - 0.5V Low stage (relay is OFF),
  • 0.5V – 2.5V (unknown state).
  • 2.5V - 5V High state (relay is ON).

Input control signal high state current:

  • 2.5V: 0.1mA
  • 3.3V: 0.18mA
  • 5V: 0.35mA                 


  • Voltage: 5V DC.
  • Current: 8.3mA.
  • Resistance: 2880 ohm +-10%.

Contact Rating:

  • Contact Resistance: <0.1 ohm.
  • Contact Capacity: 125V AC / 1A,  30V DC / 2 A.


Customer Reviews

2 Item(s)

per page
Best value DPDT board out thereReview by Tim
(Posted on 11/16/13)

I use this in a remote controlled preamp. Each relay provides one stereo switch. Easy to drive from an Arduino.

The only thing that's not ideal is that it powers up in a random state, but I think that's more down to how it's controlled, and not a flaw in the board, which simply sets the relay based on inputs.

Easy to wire up, robust, no problems.

Not quite meets specs but still goodReview by Richard
(Posted on 6/16/13)

This relay board needs to have a resistor change to drive it from 3.3 volts reliably. Other than that, it is good to go with a Raspberry Pi. I replaced the 1k resistor with a 680 ohm and removed the 10k ohm resistor since the Raspberry has it's own pulldown resistors on the GPIO bus. I2c port expanders like the MPC 23017 also have pulldown resistors.

2 Item(s)

per page

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Delivery & Tracking


Depending on your location and the type of goods you have purchased, SainSmart.com will dispatch your items via 1 from 5 carriers. Items will be shipped from our main warehouse in China. If you prefer to have it shipped from other warehouse, please contact us via support@sainsmart.com

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