BD178 。 Complement to BD178. / Applications 。 Medium power linear and switching applications. / Equivalent Circuit / Pinning 12 3 PIN1：Emitter PIN 2：Collector.

。 Medium power linear and switching applications. / Equivalent Circuit / Pinning 12 3 PIN1：Emitter PIN 2：Collect.

TO-126F NPN 。Silicon NPN transistor in a TO-126F Plastic Package.  / Features BD178 。 Complement to BD178. / Applications 。 Medium power linear and switching applications. / Equivalent Circuit / Pinning 12 3 PIN1：Emitter PIN 2：Collec.

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