Replaced by the 3959, an SSR with similar characteristics.
The 3954 AC Solid State Relay can be used to switch loads of up to 50A at 120VAC 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 varistor to protect your SSR from harmful transients and surges. 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 using a heatsink.
We've listed this SSR at 120V because the included MOV is only rated for 120V operation. If you decide that you do not need the MOV for surge protection, you can use this relay without the MOV at the manufacturer's specification of 240V.
| Board Properties | |
|---|---|
| Controlled By | Digital Output (5V) |
| Electrical Properties | |
| Relay Output Type | SCR |
| Isolation Method | Photoelectric |
| Dielectric Strength | 2.5 kV AC |
| Control Voltage Min | 3 V DC |
| Control Voltage Max | 32 V DC |
| Load Voltage Max (AC) | 120 V AC |
| Load Current Min | 100 mA |
| Load Current Max (AC) | 10 A |
| Load Current Max (With 3955 Heatsink) | 20 A |
| Load Current Max (With 3956 Heatsink) | 50 A |
| Load Surge Current | 800 A |
| Turn-on Time Max | 1 ms |
| Turn-off Time Max | 11.6 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 | HFS34/D-240A80PS-Y |
| Customs Information | |
| Canadian HS Export Code | 8536.49.00 |
| American HTS Import Code | 8536.49.00.75 |
| Country of Origin | CN (China) |
Have a look at the Data Sheet for a complete set of specifications.
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.
Have a look at the relay's characteristic curve in the Data Sheet to decide if you need a heatsink. Without a heatsink, the maximum current that can be handled by this relay is 10A up to an ambient temperature of 40°C.
In order to be able to switch currents of up to 50A, you have to use the 3956 Heatsink or the 3961 Heatsink.
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