Solid State Relay – 40A (3-32V DC Input) – SSR-40DA – Sparkfun COM-13015
This solid-state relay (SSR) allows you to control high-current AC loads from a lower voltage DC control circuitry.
Solid-state relays have several advantages over mechanical relays. One such advantage is that they can be switched by a much lower voltage and at a much lower current than most mechanical relays. Also, because there are no moving contacts, solid-state relays can be switched much faster and for much longer periods without wearing out.
This particular flavour of SSR-40 can switch current loads of up to 40A with a 3-32V DC input and a zero cross trigger control method.
Each one of these relays is equipped with four screw terminals (for use with ring or fork connectors) and a plastic cover that slides over the top of the relay to protect the terminals.
SSR-40DA Specifications:
- Rated Load Current: 10A
- Input Voltage: 3 ~ 32VDC
- Min. ON/OFF Voltage: ON > 2.4V, OFF <1V
- Trigger current: 7.5mA / 12V (CMOS / TTL Compatible)
- Operating Voltage: 24 ~ 380V AC
- Voltage Drop: 1.6V / 25°C
- Max. Durated Current: 135A
- Leakage Current: 3.0mA
- Response Time: ON < 10ms, OFF < 10ms
- Operating Temperature: -20°C ~ +80°C
SSR-40DA Connection Diagram:
SSR Solid-State Relay Dimensions:
- Length: 60mm (2.36″)
- Width: 45mm (1.77″)
- Height: 22.5mm (0.89″)
- Dimensions are in mm
SSR-40DA Documents:
SSR-40DA Video:
Paul Cracknell –
Seems to do exactly what is required.
Prompt and very helpful service.
Tom Roberts –
I’m using this in conjunction with a wemo maker to have automated control of my hot water tank and link it in to my home assistant setup. Hass tells the wemo maker to trigger the relay and the water is heated. It works perfectly.
Mark Johnson –
Looks like a good product, quickly delivered. It’s working already in the project.