Found in a 90s documentation, this circuit triggers the SCR when there is an overvoltage in order to cause the fuse to blow quickly. The SCR can be a TIC106.
This protector was found in an Electronics Now from the 90s. The 250 V transient suppressors are common...
This circuit was found in a General Electric documentation from 1965. The circuit is full wave for...
This circuit uses a dual-gate MOSFET, a rare component today. We found it in American...