3950_0 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 a 1012 - PhidgetInterfaceKit 0/16/16.
Package includes:
- A Protective Relay Cover
- A Heat Transfer Pad
- A Diode
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.
Have a look at the relay's characteristic curve in the Data Sheet to decide if you need a heat sink. Without a heat sink, the maximum current that can be handled by this relay is 18A up to an ambient temperature of 40°C.
In order to be able to switch currents of up to 80A, you have to use the 3955 - Heat Sink
This relay connects to the 1012 - PhidgetInterfaceKit 0/16/16.
Just connect the positive control terminal of the SSR to the +5V terminal on the 1012, and connect the negative terminal to an open collector digital output on the 1012.
Resources:
Electrical Properties
| Relay Output Type | MOSFET |
| Isolation Method | Photoelectric |
| Dielectric Strength | 2.5 kV AC |
| Control Voltage Min | 3 V DC |
| Control Voltage Max | 32 V DC |
| Load Voltage Max (DC) | 30 V DC |
| Load Current Min | 20 mA |
| Load Current Max (DC) | 18 A |
| Load Current Max (With 3955 Heatsink) | 50 A |
| Load Current Max (With 3956 Heatsink) | 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 | HFS33/D-30D50M |
