What is Silicon controlled rectifier?
[[File:SCR de potencia.jpg|thumb|250px|Silicon controlled rectifier]] [[Image:Thyristor circuit symbol.svg|thumb|150px]] '''Silicon controlled rectifier''' (SCR) is a type of [[thyristor]]. It is a four-layer solid-state [[electrical current|current]]-controlling device. SCRs are unidirectional devices: they conduct current only in one direction. Normally, SCRs can be triggered only by currents going into the gate. A rectifier is an electrical device that converts [[alternating current]] (AC) to [[direct current]] (DC). SCRs are used for rectification of high-power AC in high-voltage direct-current power transmission. They are also used in the control of [[welding]] machines. SCRs are mainly used in devices for the control of high power, perhaps with high voltage. They are suitable for use in medium- to high-voltage AC power control applications, such as lamp dimming, power regulators and motor control. [[Category:Electronic components]] [[Category:Rectifiers]]