BD140 PNP Bipolar Medium Power Transistor 80V 1.5A TO-126 Package

BD140 PNP Bipolar Medium Power Transistor 80V 1.5A TO-126 Package

The BD140 is a high-quality PNP silicon transistor designed for medium-power amplification and switching applications. With a collector-emitter voltage of 80V and a collector current rating up to 1.5A, it delivers stable operation, low saturation voltage, and high thermal reliability.

Encased in a TO-126 package, the BD140 provides efficient heat dissipation, making it ideal for audio amplifiers, voltage regulators, motor drivers, and general-purpose power control circuits. It is commonly used in complementary configurations with the BD139 (NPN) for push-pull amplifier designs or other medium-power control applications.

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Features:

• Transistor Type: PNP Silicon
• Package: TO-126 (medium-power package with good thermal performance)
• Collector-Emitter Voltage (V_CE): 80V
• Collector Current (I_C): 1.5A
• Power Dissipation (P_tot): Up to 12.5W (with heat sinking)
• DC Current Gain (hFE): 40–250 (typical)
• Low Collector Saturation Voltage: Improves efficiency in switching and amplification
• High Thermal Stability: Reliable performance over temperature variations
• Complementary Device: Pairs with BD139 (NPN) for push-pull amplifier stages
• Durable & Reliable: Long-lasting performance for professional and hobbyist use

Applications:

• Audio Amplifiers: Medium-power output and driver stages
• Voltage Regulators: Provides stable voltage and current control
• Relay & Motor Drivers: Efficiently drives motors, relays, and solenoids
• Signal Amplification: Suitable for low- and medium-frequency analog circuits
• Push-Pull Amplifiers: Works with BD139 (NPN) for complementary amplifier stages
• Switching Circuits: Reliable medium-current switching applications
• Educational & Prototype Projects: Ideal for experimentation and hobbyist circuits

bd140-transistor-datasheet