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forward-conducting triode thyristor surge protective device

A three-terminal thyristor surge protective device that switches only for negative main terminal-2 (cathode) voltage and conducts large currents at positive main terminal-2 (cathode) voltages comparable in magnitude to the on‑state voltage.

NOTE 1 In conventional thyristor terminology, this device would be called a reverse-conducting triode thyristor.

NOTE 2 Application of an appropriate fixed gate voltage allows switching to take place at voltages well below the intrinsic breakover value.

References

JESD77-B, 2/00

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