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A solid state relay (SSR) is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals. They serve the same function as an electromechanical relay , but solid-state electronics contain no moving parts and have a longer operational lifetime.
A solid-state relay (SSR) is a solid state electronic component that provides a function similar to an electromechanical relay but does not have any moving components, increasing long-term reliability. A solid-state relay uses a thyristor, TRIAC or other solid-state switching device, activated by the
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The traditional relay is an electromechanical switch that uses an electromagnet controlled by a current to operate a mechanical switching mechanism. Other operating principles are also used (for instance, solid-state relays invented in 1971 control power circuits with no moving parts, instead using a semiconductor device to perform switching ...
The term solid-state became popular at the beginning of the semiconductor era in the 1960s to distinguish this new technology. A semiconductor device works by controlling an electric current consisting of electrons or holes moving within a solid crystalline piece of semiconducting material such as silicon, while the thermionic vacuum tubes it replaced worked by controlling a current of ...
Solid-state relay, an electronic switching device in which a small control signal controls a larger load current or voltage; Sources, sinks and reservoirs, for greenhouse gases; Stable salt reactor, a proposed low-cost nuclear reactor design; Sum of squared residuals; Sum of squares due to regression
Relay or contactor – Electro-mechanically operated switch (see also solid state relay above) Reed switch – Magnetically activated switch; Thermostat – Thermally activated switch; Humidistat – Humidity activated switch; Circuit breaker – Switch opened in response to excessive current: a resettable fuse
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