An SCR is a type of silicon controlled rectifier that belongs to the reverse blocking three-terminal thyristor, a controllable rectifying element, and is the most widely used type. It is a silicon pnp-n four-layer switching element that was introduced by General Electric in 1958 and was called solid state thyratron at the time. Two-terminal silicon rectifying elements simply act as valves and do not have a control adjustment function themselves, but an SCR is a semiconductor rectifier with control capabilities, like a mercury rectifier with a control grid, and is capable of controlling large amounts of power with extremely small control inputs, with the added benefit of low loss. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
シリコン制御整流器のことで,制御できる整流素子であるサイリスタとして逆阻止3端子サイリスタに属し,最も多く使われている。シリコンのp-n-p-n4層構造のスイッチ素子で,ゼネラル・エレクトリックから 1958年に発表され,当時は,固体サイラトロン solid state thyratronと呼ばれた。2端子シリコン整流素子では単なる弁作用であり,それ自体は制御調整機能をもっていないが,SCRは,制御グリッドつき水銀整流器のように,制御能力のある半導体整流器で,きわめて微小な制御入力によって大電力の制御が可能であり,しかも損失が少ないという特徴がある。
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