Automation & Control
Solid State Relay (SSR)
An electronic switch with no moving contacts.
IN ONE SENTENCE
It uses semiconductor devices to switch a load from a control signal.
In normal English
SSRs can switch frequently and silently but have leakage current, voltage drop and heat-dissipation considerations.
Why would I use it?
Use it for high-cycle switching where a mechanical relay would wear quickly.
THINK OF IT LIKE…
A relay that switches electronically instead of clicking mechanical contacts.
Related terms
relay, contactor, transistor output
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