AC128 Germanium PNP Power Transistor – TO-1 Package with Heatsink

The AC128 is a classic germanium PNP power transistor designed for low-frequency amplification and switching applications. Widely used in vintage audio equipment, radio receivers, amplifier circuits, and electronic hobby projects, the AC128 is valued for its characteristic germanium transistor performance. This version includes a heatsink for improved thermal dissipation and enhanced reliability during operation.

Key Features -

• Germanium PNP power transistor

• Supplied with heatsink for improved cooling

• Suitable for low-frequency amplification and switching

• Vintage audio and radio circuit compatible

• Low saturation voltage characteristics

• Metal TO-1 package construction

• Reliable performance in classic electronic designs

Specifications -

• Product type - Germanium Bipolar Junction Transistor (BJT)

• Part number - AC128

• Transistor polarity - PNP

• Semiconductor material - Germanium

• Package type - TO-1 Metal Can

• Mounting type - Through Hole

• Number of terminals - 3

• Collector-Emitter Voltage (VCEO) - 20V

• Collector-Base Voltage (VCBO) - 32V

• Emitter-Base Voltage (VEBO) - 15V

• Maximum Collector Current (IC) - 1A

• Power Dissipation - 0.8W (higher with proper heatsinking)

• Transition Frequency (fT) - Typical low-frequency audio range

• Operating Temperature Range - Suitable for standard electronic applications

Applications -

• Vintage audio amplifiers

• Radio receiver circuits

• Push-pull output stages

• Low-frequency signal amplification

• Educational electronics projects

• Germanium transistor replacement and restoration

• Electronic hobby and DIY projects