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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 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 ...
1959 - Basler introduced the first solid-state voltage regulator, the SRA. 1961 - Basler developed its first Static Excitation System. 1972 - Basler’s first solid-state relay was developed. 1990 - Basler International Group found in Wasselonne, France; early 1990s - Basler started development of a Digital Excitation Control System (DECS range)
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
Another important factor during a commutation from on-state to off-state is the di/dt of the current from MT1 to MT2. This is similar to the recovery in standard diodes: the higher the di/dt, the greater the reverse current. Because in the TRIAC there are parasitic resistances, a high reverse current in the p-n junctions inside it can provoke a ...