BD136 Transistor TO-126 Code: 03133648

The BD136 is a medium-power PNP bipolar junction transistor housed in a plastic TO-126 package. It handles a continuous collector current up to 1.5A, a collector-emitter voltage up to -45V, and is widely used for audio frequency amplification and complementary medium-power switching circuits.

 Pin Configuration

• Pin 1 (Emitter):Current output/reference, typically connected to negative rail or ground.
• Pin 2 (Collector):Connects to the load.
• Pin 3 (Base):Biasing input control pin used to turn the transistor on or off.

 Technical Specifications

• Transistor Type:PNP
• Package Type:TO-126 (SOT-32)
• Max Collector-Emitter Voltage :-45V
• Max Collector-Base Voltage :-45V
• Max Emitter-Base Voltage :-5V
• Max Continuous Collector Current :-1.5A
• Peak Collector Current:-3.0A
• Max Collector Dissipation :25W (without heatsink) / up to 12.5W (with proper heatsink)
• DC Current Gain :25 to 250
• Transition Frequency :190 MHz
• Operating Junction Temperature:-55°C to +150°C

 Applications & Complementary Pair

• Complementary NPN:BD135 (making them ideal for push-pull audio amplifier output stages)
• Common Uses:Medium-power audio driver circuits, speaker amplifiers, motor drivers, and general-purpose switching for microcontroller outputs.