The BD138 is a medium-power silicon PNP transistor designed for use in audio driver stages and general-purpose applications. It features a robust construction with a current handling capability of up to 1.5A, making it a reliable solution for circuits that require more power than a simple signal transistor.

• Type: PNP Epitaxial Silicon Transistor
• Package: TO-126 / SOT-32 (Flat plastic with a hole for mounting screw)
• Collector-Emitter Voltage: 60V
• Maximum Collector Current: 1.5A
• Power Dissipation: 12.5W (with suitable heat sinking)
• Complementary NPN: BD137

Product Advantages:

• Easy Mounting: The TO-126 package allows for direct screw mounting onto heat sinks or chassis for effective heat dissipation.
• High Reliability: Designed for stable performance across a wide temperature range.
• Versatility: Ideal for pre-amplification stages and drive applications in Hi-Fi amplifiers.

Main Applications:

• Audio Amplifiers: Often used as a driver stage in power amplifiers.
• Load Driving: Suitable for controlling small relays, lamps, and DC motors.
• Voltage Regulators: Used in linear power supply regulation circuits.
• Switching Circuits: Perfect for switch applications at voltages up to 60V.