3051_1 - Dual Relay Board


Product Features

This board has 2 SPDT mechanical relays rated at 240VAC/10A or 100VDC/5A.

Product Description


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.


Product Specifications


Physical Properties

Switch Type SPDT
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


Electrical Properties

Dielectric Strength 1.5 kV AC
Contact Resistance Max 100 mΩ
Load Voltage Max (DC) 100 V DC
Load Voltage Max (AC) 240 V AC
Load Current Min 100 mA
Load Current Max (DC) 5 A
Load Current Max (AC) 10 A
Turn-on Time Max 10 ms
Turn-off Time Max 10 ms



Current Consumption Min 14 mA
Current Consumption Max 180 mA
Supply Voltage Min 3.3 V DC
Supply Voltage Max 12 V DC




You can protect your board by purchasing the 3820 - Acrylic Enclosure for the 3051.

Related Products


If you are looking for a product to do signal switching see 1017 PhidgetInterfaceKit 0/0/8.

We also have a 4-Relay board that can plug directly into your PC. See the 1014 – PhidgetInterfaceKit 0/0/4.


Comes packaged with






Previous Versions of the 3051