Thyristors may be used to bond a source of stored energy, such as a capacitor to a load or to bypass and protect the load in the case of a crowbar circuit. In these pulsed power applications where the rate of rise of current is very fast, the pulse power switch is acting as a closing switch and ordinary phase control thyristors SCRS are probable to fail due to the high di/dt experienced.
Thyristors or SCRs silicon controlled rectifiers. The Phase Control SCR provides phase control of ac signals with a line frequency of 50-60Hz. The Inverter SCR is used in pulsed power applications connecting higher frequencies. The main difference between the two families is the turn off time tq. Inverter SCRs typically have a tq of less than 30 microseconds (µs). Similar phase control SCRs has tq ratings of several hundred µs.
Thyristors or SCRs silicon controlled rectifiers.