They are similar and function similar. The difference is that triacs are usually involved with the ac side and scr's with the dc side. Triac circuits can be used to control line-voltage (AC) powered devices.
The SCR (Silicon Control Rectifier), is a four-layer (PNPN) sandwich of semiconductor material
Fig. 1-a
equivalent circuit is shown in Fig. 1-b
The SCR (Silicon Control Rectifier), is a four-layer (PNPN) sandwich of semiconductor materialFig. 1-a
equivalent circuit is shown in Fig. 1-b
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