Quantity Available: 203
| Qty | Price |
|---|---|
| 5 | $19.20 |
| 10 | $18.40 |
The 3950 DC Solid State Relay can be used to switch loads of up to 50A at 30VDC using a 5V 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.
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This SSR can be controlled either by using a high-power digital output (such as those on the OUT1100 - 4x Digital Output Phidget) or by using an open-collector digital output and a 5V source, which can be done with the 1012 - PhidgetInterfaceKit 0/16/16.
| Product | Board Properties | |
|---|---|---|
| Part Number | Price | Controlled By |
 4x Digital Output Phidget
|
$15.00 | VINT |
 PhidgetInterfaceKit 0/16/16
|
$95.00 | USB (Mini-USB) |
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.
| Board Properties | |
|---|---|
| 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 Origin | CN (China) |
| Product | Electrical Properties | ||||
|---|---|---|---|---|---|
| Part Number | Price | Control Voltage Min | Control Voltage Max | Load Voltage Min (DC) | Load Voltage Max (DC) |
 DC Solid State Relay - 120V 75A
|
$45.00 | 3 V DC | 32 V DC | 5 V DC | 120 V DC |
 DC Solid State Relay - 30V 100A
|
$30.00 | 4 V DC | 32 V DC | — | 30 V DC |
 DC Solid State Relay - 30V 50A
|
$20.00 | 4 V DC | 32 V DC | — | 30 V DC |
 DC Solid State Relay - 50V 80A
|
$25.00 | 4 V DC | 32 V DC | — | 50 V DC |
