2N4151 (SILICON) thru 2N4198 THYRISTORS .. multi purpose PNPN silicon controlled rectifiers suited for indus trial, consumer, and mulitary applications. Offered in a choice of space saving, economical packages for mounting versatility. Uniform Low Level Noise lmmune Gate Triggering IGT ~ 10 mA (Typ) @ TC ~ 250 C Low Forward "On" Voltage I"f ~ 1.0 V (Typ) @ 5.0 Amp @ 250 C High Surge Current Capability ITSM ~ 100 Amp Peak Fa.