REL1100_0 4x Isolated Solid State Relay Phidget

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Add four PWM-enabled solid state relay outputs to your hub with this module. This board is isolated to prevent ground loops.


When the 3.3V digital output mode of your VINT port is not enough, this 4x Isolated Solid State Relay Phidget adds four PWM-enabled solid state relay outputs to your system. Because it uses relay outputs, you can control more powerful devices that require up to 30V and 8A. LED strips, DC motors, power relays, fans and other small circuits are just a few examples of what can be controlled with this module.

SKU: REL1100_0

Low-Side Switching

Each solid state relay switches an external circuit to ground when enabled. This action allows completion of the circuit in order to power a load. The power to the load is supplied externally and should be connected in series with the load and the relay output. Alternatively, you could use a pull-up resistor on the input of your load and then switch the input to ground when you want it to turn off. Each channel has a ground terminal beside it to make wiring a snap, and each one leads to a common ground.

PWM Switching

In addition to switching at microsecond speeds, each relay output is also capable of pulse-width modulation; rather than simply switching on or off, you can select a percentage duty cycle to limit the power being supplied to a specific level. This allows you to control devices like a dimmer would, which is an important feature for LEDs, fans, and motors. Check the datasheet for your device to ensure that it is designed to be used with PWM (some devices such as incandescent or CF bulbs are not designed for dimming).

Isolated for Stability

The VINT port on this board is electrically isolated from the rest of the board, improving stability by eliminating ground loops.


Product Specifications for 4x Isolated Solid State Relay Phidget

Board Properties
Controlled ByVINT
Electrical Properties
Current Consumption Min3.5 mA
Current Consumption Max4 mA
Load Voltage Max (DC)30 V DC
Load Current Max (DC)8 A
Switching Power Max (Real)* 240 W
Relay Properties
Number of Relays4
Contact Resistance Max35 mΩ
Turn-off Time Max100 ns
Switch TypeSPST Normally Open MOSFET
Turn-on Time Max100 ns
PWM Resolution0.1 %
PWM Frequency Max16 kHz
Physical Properties
Recommended Wire Size16 – 26 AWG
Operating Temperature Min-40 °C
Operating Temperature Max85 °C

* Note: At switching powers powers higher than 50W, external cooling may be required. For high power applications, a hockey-puck style SSR may be more appropriate. See the “Other Relays” tab for more details.