• DC Solid State Relay - 30V 50A


The 3950 DC Solid State Relay can be used to switch loads of up to 50A at 30VDC using the digital output from. e.g., a OUT1100_0 but also many other PhidgetInterfaceKit's that have a digital output. The Relay comes with an optional protective cover to protect people from touching the exposed high power wires, and a diode to protect your SSR from harmful transients. All wires connect to this relay by screw terminals. If you are switching a high power load or find the relay is getting hot, please consider a heat sink.


This solid state relay can be controlled with Phidget digital outputs. For more details, see the Connection & Compatibility tab.

Comes Packaged with

  • A Protective Relay Cover
  • A Heat Transfer Pad
  • A Diode

Product Specifications

Controlled By Digital Output (5V)
Electrical Properties
Relay Output Type MOSFET
Isolation Method Photoelectric
Dielectric Strength 2.5 kV AC
Control Voltage Min 4 V DC
Control Voltage Max 32 V DC
Load Voltage Max (DC) 30 V DC
Load Current Min 20 mA
Load Current Max (DC) 50 A
Load Surge Current 120 A
Turn-on Time Max 1 ms
Turn-off Time Max 0.5 ms
Physical Properties
Length 58 mm
Width 45 mm
Height 25 mm
Operating Temperature Min -30 °C
Operating Temperature Max 80 °C
Other Properties
Manufacturer Part Number KS33/D-30D50-L
Customs Information
Canadian HS Export Code 8536.41.00
American HTS Import Code 8536.41.00.50
Country of OriginCN (China)

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DC Solid State Relay - 30V 50A

  • Brand: Phidgets
  • Product Code: 3950_0
  • Availability: In Stock
  • 28.98€

  • Ex Tax: 23.95€

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