BUL57 series datasheets. Manufacturer: SGS-Thomson Microelectronics.

BUL57 HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR Datasheet*) BUL57FP HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORS Datasheet*) There are other manufacturers for this components. For more information please check BUL57 (Semelab Plc.)

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