Replaced by the 3958, an SSR with similar characteristics.
The 3951 DC Solid State Relay can be used to switch loads of up to 80A at 50VDC using the digital output from a 1012 - PhidgetInterfaceKit 0/16/16. 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. Heat sinks 3955 and 3956 are designed for use with this relay.
This solid state relay can be controlled with Phidget digital outputs. For more details, see the Compatible Products tab.
|Relay Output Type||MOSFET|
|Dielectric Strength||2.5 kV AC|
|Control Voltage Min||4 V DC|
|Control Voltage Max||32 V DC|
|Load Voltage Max (DC)||50 V DC|
|Load Current Min||20 mA|
|Load Current Max (DC)||80 A|
|Load Surge Current||200 A|
|Turn-on Time Max||1 ms|
|Turn-off Time Max||0.5 ms|
|Operating Temperature Min||-30 °C|
|Operating Temperature Max||80 °C|
|Manufacturer Part Number||KS33/D-50D80-L|
Have a look at the Data Sheet for a complete set of specifications.
This SSR can be controlled using our relay output boards; ordinary digital output boards usually don't have sufficient power to activate the relay. Just connect the positive control terminal of the SSR to the +5V terminal on the relay board, and connect the negative terminal to an output on the relay board.
|Product||Relay Properties||Electrical Properties|
|Image||Part Number||Price||Number of Relays||Load Current Max (DC)||Load Voltage Max (DC)|
|REL1100_0||$25.00||4||8 A||30 V DC|
|REL1101_0||$50.00||16||8 A||30 V DC|
If you're switching high current devices or circuits, we recommend that you use a heatsink. In some applications, you may be able to mount the relay to a metal surface which can act as a heatsink by itself. This relay comes with a heat transfer pad that you can sandwich between the relay and the heatsink or mounting surface. When screwed on tight, it will eliminate any air gaps and ensure that the heat conducts from the relay to the heatsink. In cases where the heatsink cannot dissipate heat fast enough, you should add a fan to one end of the heatsink so that air is constantly moving through the fins.