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Arduino/Seeeduino Shield compatible High quality relays of 15A max switching current Built-in LED indicator for each relay Relay lifetime up to 100,000 Cycle Relay screws for firm connection


The Relay Shield provides four high quality relay that can control high current loads to Arduino / Seeeduino boards. It also provides NO (Normally Open) / NC (Normally Closed) interface. It could be a nice solution for controlling devices that could not be directly controlled by Arduino's Digital I/Os. Standardized shield form factor enables smooth connection with Arduino and compatibles. The shield also has four LED indicators to show the on/off state of each relay.

Relays are useful in switching on/off AC appliances like fan, light, motor or high current DC actuators like solenoid valve etc...

Note: Exercise caution when dealing with AC. Get help from certified electrician.


  • Arduino/Seeeduino Shield compatible

  • Relay screw terminals

  • Working status indicators for each relay

  • High quality relays

  • Provides NO/NC interfaces

Channel1 Interface

  • COM1 - Common pin

  • NC1 - Normally Closed. Will be connected with COM1 when RELAY1 pin is set low and disconnected when RELAY1 is high;

  • NO1 - Normally Open. Will be connected with COM1 when ŸRELAY 1 pin is set high and disconnected when RELAY1 is low;


  • RELAY1-RELAY4 pins could be connected directly with Arduino pin number of 7-4, so that four relays could be easily controlled by the Arduino

For technical support, please post your questions to our forum.

Technical details

Dimensions 100mm x67mm x30mm
Weight G.W 77g
Battery Exclude
Operating Voltage 4.75V~5.25V
Operating Current: 8~250 mA
Switching Voltage: 250VAC/30VDC
Switching Current: 15A/7A
Frequency: 1Hz
Switching Power: 70W
Relay Life: 100,000 Cycle
ESD contact discharge: ±4KV
ESD air discharge: ±8
Dimension: 68.7 x 53.5 x 30.8 mm
Net Weight: 55±2 g

Part List

Relay Shield v3.0 1


HSCODE 85364110
USHSCODE 8473.30.5100
UPC 841454104087

Relay Shield v3.0

The Relay Shield provides a solution for controlling high current devices that cannot be controlled by Arduino’s Digital I/O pins due to current and voltage limits.

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Customer Reviews
    Everything in perfect condition, arrived very well packaged.

    Review by

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    Review by

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    Great Shield Great shield which meet my technical requirement.

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Product Faqs

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  • Will you have SKU 103030009 available again soon? We are looking for 20 pcs.
    Question by: Joe Black on 2019-03-26 16:38:58

    Hi Joe, This product will be back in stock at April 10. Please stay tuned. Thanks for your time and interest in Seeed.

    Answer by: admin on 2019-03-27 10:06:14
  • Question by: admin on 2018-12-18 02:29:58

    So I just looked at a close up of the relays in the pic and answered half my question. ;) Now just need to make sure it works with an Uno Rev3 board.

    Answer by: admin on 2018-12-18 02:29:58
  • Question by: admin on 2018-12-18 02:21:25

    YES!Relay Shield v3.0 is compatible with Arduino/Genuino 101

    Answer by: admin on 2018-12-18 02:21:25