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3051_1 Dual Relay Board, 3051


This board has 2 SPDT mechanical relays rated at 210W for DC or 1750VA for AC.

Comes packaged with:


The Dual Relay Board allows you to control larger loads and devices like AC or DC motors, electromagnets, solenoids, and incandescent light bulbs.

Note: This board is not suitable for switching signals. It takes at least 100mA of current to bridge the oxide layer that forms on the relay contacts, and most signals will not meet this requirement. If you need to switch signals, check out the 1017 - PhidgetInterfaceKit 0/0/8.


This relay board can be controlled with Phidget digital outputs.


Physical Properties

Switch Type


Switching Speed Max

20 cpm

Recommended Wire Size (Control)

16 - 26 AWG

Recommended Wire Size (Load)

12 - 24 AWG

Operating Temperature Min

0 °C

Operating Temperature Max

70 °C


Controlled By

Digital Output (5V)

Current Consumption Min

14 mA

Current Consumption Max

180 mA

Supply Voltage Min

3.3 V DC

Supply Voltage Max

12 V DC

Electrical Properties

Dielectric Strength

1.5 kV AC

Contact Resistance Max

100 mΩ

Load Voltage Max (DC)

* 30 V DC

Load Voltage Max (AC)

277 V AC

Load Current Min

100 mA

Load Current Max (DC)

7 A

Load Current Max (AC)

12 A

Turn-on Time Max

10 ms

Turn-off Time Max

10 ms