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Darrah Electric
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Thyristors (SCRs)

Silicon-Controlled Rectifiers (SCRs) Thyristors are devices that act exclusively as bistable switches, conducting when the gate receives a current trigger, and continuing to conduct while the voltage across the device is not reversed (forward-biased). SCRs are unidirectional devices that can be triggered normally only by currents going into the gate. Darrah offers SCRs ranging from 40 amps to 6100 amps, and ranging from 25 volts to 8500 volts.

Press Packs
A semiconductor package similar to a hockey puck. A press pack design is mechanically mounted or compressed between two flat surfaces used to remove heat and conduct current. The pressure or compression force is specified by the manufacturer.