Products for USB Sensing and Control
3051_1 - Dual Relay Board
Quantity Price
In Stock
Qty: 675

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 TypeSPDT
Switching Speed Max20 cpm
Recommended Wire Size (Control)16 - 26 AWG
Recommended Wire Size (Load)12 - 24 AWG
Operating Temperature Min0 °C
Operating Temperature Max70 °C

Electrical Properties

Dielectric Strength1.5 kV AC
Contact Resistance Max100 mΩ
Load Voltage Max (DC)100 V DC
Load Voltage Max (AC)240 V AC
Load Current Min100 mA
Load Current Max (DC)5 A
Load Current Max (AC)10 A
Turn-on Time Max10 ms
Turn-off Time Max10 ms


Current Consumption Min14 mA
Current Consumption Max180 mA
Supply Voltage Min3.3 V DC
Supply Voltage Max12 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

Code Samples For This Product

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