A1381 & C3503 (2SA1381 & 2SC3503) PNP-NPN Transistor Pair For Audio

A1381 is a silicon PNP epitaxial power transistor.

#. Audio Frequency Power amplifier applications
#. Small collector output capacitance: Cob = 2.3 pF (typ.)
#. High Breakdown Voltage
#. Complement to C3503
#. TO-126 Package

C3503 is a silicon NPN epitaxial power transistor.

#. Audio Frequency Power amplifier applications
#. Small collector output capacitance: Cob = 2.3 pF (typ.)
#. High Breakdown Voltage
#. Complement to A1381
#. TO-126 Package

These transistors were widely used in audio amplifiers. These were used as voltage amplifiers and audio drivers.