Solid State Relays

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About Solid State Relays


Solid-state relays (SSRs) are electronic switching devices that control the flow of electrical current using semiconductor switching elements such as thyristors, triacs, or MOSFETs (metal-oxide-semiconductor field-effect transistors). Unlike electromechanical relays, SSRs have no moving parts, offering advantages such as fast switching speed, high reliability, silent operation, and long operational life. Solid-state relays find applications in industrial automation, process control systems, HVAC systems, medical equipment, and consumer electronics for tasks such as switching AC or DC loads, motor control, temperature control, and lighting control.