BD202 PNP Transistor Pinout Datasheet

Introduction

The BD202 is a PNP silicon power transistor used in medium-power amplifier and switching applications, especially suited for audio output stages and regulator circuits where negative-side control is needed. It is part of the BD20x/BD20x series, designed to complement NPN transistors in push-pull amplifier configurations. According to the datasheet, BD202 is intended as the PNP complement to BD201, and along with BD204, forms a matched set of PNP devices.

Because of its PNP polarity, BD202 conducts when its base is driven to a voltage slightly lower than its emitter. This makes it ideal for the negative half of symmetric amplifier outputs. Its design features include low saturation voltages, a broad safe operating area, and good thermal performance, making it robust enough for continuous operation in audio amplifiers and power driver circuits.

BD202 PNP Transistor

Manufacturers often specify BD202 in TO-220 / Versawatt plastic packages, providing sufficient heat dissipation for power stages. It is commonly used alongside its NPN complements BD201 or BD203 in class AB amplifiers and regulatory circuits to provide mirrored positive and negative output drive.

Pinout of BD202

Key Features

• Designed for PNP side of complementary amplifier output stages
• Low collector-emitter saturation voltage
• Wide safe operating area
• Good thermal stability and mechanical robustness
• Suitable for audio, driver, and switching applications
• Matched complementary pairing with NPN devices

Specifications/Characteristics

• Collector-Emitter Breakdown Voltage (VCEO): –45 V
• Collector-Base Breakdown Voltage (VCBO): –60 V
• Emitter-Base Breakdown Voltage (VEBO): –5 V
• Continuous Collector Current (IC): –8 A
• Non-repetitive Peak Collector Current (ICM): –12 A
• Total Power Dissipation (Ptot) at base mounting: 60 W
• DC Current Gain (hFE) minimum under test: 30
• Operating Junction Temperature range: –65 °C to +150 °C
• Package type: Plastics in Versawatt / TO-220 style

Pin Configuration

Comparison Summary: BD201 NPN vs BD202 PNP

• BD201 is an NPN power transistor handling the positive half in complementary audio amplifier stages and is rated for VCEO = 45V, while BD202 is its PNP counterpart handling the negative half with a similar power rating but reversed polarity.
• BD201 conducts when its base is pulled positive relative to its emitter; BD202 conducts when its base is pulled negative relative to its emitter.
• In amplifier designs, BD201 + BD202 form a complementary pair that delivers balanced output drive for both halves of the signal waveform, reducing crossover distortion and improving fidelity.

More Circuit Layouts

Key Applications of BD202 PNP Transistor

• Push-pull audio amplifier output stages
• PNP side of dual supply amplifier circuits
• Series/shunt regulator circuits
• Power amplifier driver stages
• Medium-power switching circuits
• Audio equipment in hi-fi systems

NPN Complimentary Transistor

• The NPN complementary transistor for BD202 is BD201. This pairing (BD201 + BD202) is frequently used in complementary amplifier circuits to handle both halves of the waveform symmetrically.

Equivalent Transistors of BD202 PNP Transistor

• BD204 (for alternate PNP variant)
• BDX78 (in same PNP family)
• TIP42 (for lower-power PNP alternative)
• MJ2955 (for high current PNP alternative)
• 2N2907 (for small-signal alternative)

(Pin configuration of some transistors mentioned here may different from BD202).

Datasheet of BD202 PNP Transistor

Click the following Button below to download the datasheet of BD202 Transistor :

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