2SD669AD transistor equivalent, silicon npn transistor.
2SB649AD 。 Complementary pair with 2SB649AD.
/ Applications
。 Low frequency power amplifier.
/ Equivalent Circuit
/ Pinning
12 3
4
PIN1：Base
PIN 2,4：Collecto.
。 Low frequency power amplifier.
/ Equivalent Circuit
/ Pinning
12 3
4
PIN1：Base
PIN 2,4：Collector
PIN 3：Emitt.
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