SIMPLE_CROWBAR_CIRCUIT

Published:2009/7/17 2:27:00 Author:Jessie | From:SeekIC

This circuit uses a zener diode and an SCR. When the supply voltage exceeds the zener break-down voltage plus the gate turn-on voltage of the SCR, current flows in the gate circuit, turning on the SCR and effectively shorting the supply. A fuse is generally placed in the supply line; it is designed to blow when the SCR fires, protecting and shutting down the supply.



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