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  2. Solid-state relay - Wikipedia

    en.wikipedia.org/wiki/Solid-state_relay

    Solid state relay with green LED Solid state contactor PCB mount solid-state DIL relay. 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 ...

  3. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    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

  4. Protective relay - Wikipedia

    en.wikipedia.org/wiki/Protective_relay

    An overcurrent relay is a type of protective relay which operates when the load current exceeds a pickup value. It is of two types: instantaneous over current (IOC) relay and definite time overcurrent (DTOC) relay. The ANSI device number is 50 for an IOC relay or a DTOC relay. In a typical application, the over current relay is connected to a ...

  5. Mercury relay - Wikipedia

    en.wikipedia.org/wiki/Mercury_relay

    Normally closed mercury relay, with coil around top of tube and adjustable angle. A mercury relay (mercury displacement relay, mercury contactor) is a relay that uses mercury as the switching element. They are used as high-current switches or contactors, where contact erosion from constant cycling would be a problem for conventional relay contacts.

  6. Solid-state electronics - Wikipedia

    en.wikipedia.org/wiki/Solid-state_electronics

    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 ...

  7. Category:Solid state switches - Wikipedia

    en.wikipedia.org/wiki/Category:Solid_state_switches

    Solid-state relay; Static relay; T. Thyristor; TRIAC; Trisil This page was last edited on 23 March 2013, at 09:27 (UTC). Text is available under the Creative ...

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