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可控硅分单向可控硅、双向可控硅。单向可控硅由四层半导体材料组成的,有三个PN结,对外有三个电极。双向可控硅有第一阳极A1(T1),第二阳极A2(T2)、控制极G三个引出脚。只有当单向可控硅阳极A与阴极K之间加有正向电压,同时控制极G与阴极间加上所需的正向触发电压时,方可被触发导通。可控硅的特性分为正向特性和反向特性。可控硅的检测方法和管脚判别可以用万用表进行。可控硅(单向SCR、双向BCR)这种4层的(PNPN)三端器件,在电子技术和工业控制,和数控技术中,应用十分广泛。
SCR divider SCR, two-way thyristor. Unidirectional thyristors consist of four layers of semiconductor material with three PN junctions and three external electrodes. Triac with a first anode A1 (T1), the second anode A2 (T2), the control pole G three lead feet. Only when the unidirectional thyristor anode A plus a positive voltage between the cathode K, while the control electrode G and the cathode plus the required positive trigger voltage, can only be triggered conduction. The characteristics of silicon are divided into forward and reverse characteristics. SCR detection methods and pin identification can be carried out with a multimeter. Thyristor (Unidirectional SCR, Bidirectional BCR) This four-layer (PNPN) three-terminal device is widely used in electronics and industrial control, as well as in numerical control.