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.