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Question
What is the difference between Solid-state Relays (SSRs) and Contact Relays?
Answer
SSRs (Solid State Relays) use semiconductors for no-contact operation. SSRs are not very different in operation from Contact Relays (Electromagnetic Relays). SSRs, however, consist of electronic parts with no mechanical contacts. Therefore, SSRs have a variety of features that Contact Relays do not incorporate.
Use both Relays in accordance with the intended use.
Main features of the Solid State Relay (SSR) and the Contact Relay
Input characteristics
Output characteristics
Environmental characteristics
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