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FAQs SSR

Frequently asked questions for SSR

Is your SSR, normally open or normally close?

Our SSRs are normally open. Most solid state relays have a normally open output – that is, with no control signal, the relay output is non-conducting. Some specific types of solid state relay have a normally closed output, so that with no control signal the relay output is conducting. Where a normally closed function is required for a DC controlled relay, and the particular relay type that is suitable for the application is not available with a normally closed option, then a simple inverter circuit can be used.

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Solid State Relay/SSR (80A) with Heat Sink for PID Temperature Controller Amp Amper 24-480V
Solid State Relay/SSR (80A) with Heat Sink for PID Temperature Controller Amp Amper 24-480V
SSR-80A-HS
$29.50  
Solid State Relay/SSR with Heat Sink 40A 40 Amp for PID Temperature Controller 30-240V
Solid State Relay/SSR with Heat Sink 40A 40 Amp for PID Temperature Controller 30-240V
SSR-40A-HS
$20.50  
Solid State Relay SSR 80A 24-480V Control V 3-32V DC for PID Temperature Controller
Solid State Relay SSR 80A 24-480V Control V 3-32V DC for PID Temperature Controller
SSR-80A
$24.50