Solid State Relay

Solid State relay ,abbreviated as SSR, is a new type of contactless switch device composed entirely of solid-state electronic components. It utilizes the switching characteristics of high-power transistors, power field-effect transistors, unidirectional thyristors, and bidirectional thyristors in electronic components. It can achieve contactless and spark-free connection and disconnection of electrical circuits. It is also called a contactless switch. SSR is generally a four-terminal active device, including two control terminals and two output terminals. The input and output terminals are reliably isolated. When a control signal is added to the input end, the output end can achieve the conversion between on and off.

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