BD442 PNP Transistor Pinout Datasheet

Introduction

The BD442 is a silicon PNP power transistor designed for medium power linear and switching applications. It is widely used in audio amplifier output stages, voltage regulators, and driver circuits due to its reliable performance and high current handling capability. With a collector current of up to 4A and collector-emitter voltage of 80V, the BD442 ensures stable operation even under heavy load conditions.

This transistor is built in a robust TO-126 package that provides excellent heat dissipation, allowing it to perform efficiently in both low- and medium-power circuits. The BD442 transistor offers good gain characteristics, making it ideal for applications where signal amplification and low distortion are required. It pairs perfectly with its NPN complementary counterpart BD441, forming an effective push-pull configuration in amplifier designs.

BD442 PNP Transistor

The BD442 provides reliable performance in analog and digital control circuits. It can handle moderate switching speeds, which makes it suitable for general-purpose power amplification, relay driving, and power control systems. Its solid electrical characteristics and thermal stability ensure long-term durability in industrial and consumer electronic applications.

Pinout of BD442

Key Features

• PNP silicon power transistor.
• Suitable for audio and power amplifier circuits.
• High collector current capability.
• Excellent linearity and low distortion.
• Complementary to BD441 NPN transistor.
• Reliable thermal and electrical stability.
• Durable TO-126 package for efficient heat dissipation.

Specifications/Characteristics

• Collector-Emitter Voltage (Vceo): 80V.
• Collector-Base Voltage (Vcbo): 100V.
• Emitter-Base Voltage (Vebo): 5V.
• Collector Current (Ic): 4A maximum.
• Total Power Dissipation (Ptot): 40W at Tc = 25°C.
• DC Current Gain (hFE): 40 to 250 at Ic = 1.5A, Vce = 2V.
• Transition Frequency (fT): 3 MHz typical.
• Operating and Storage Junction Temperature Range: -65°C to +150°C.
• Package Type: TO-126.

Pin Configuration

Comparison BD442 (PNP) vs BD441 (NPN Complementary)

• The BD442 is the PNP complementary version of the BD441 NPN transistor. Both share identical electrical and thermal characteristics, allowing them to function together in complementary pair configurations.
• The BD441 sources current, while the BD442 sinks it, ensuring balanced performance in amplifier and power driver circuits.
• In terms of voltage and current handling, both transistors are equivalent, differing only in polarity and direction of current flow.

More Circuit Layouts

Key Applications of BD442 PNP Transistor

• Audio power amplifiers.
• Voltage regulator circuits.
• DC-DC converters.
• Power switching and motor control.
• Relay driver and signal processing circuits.
• Push-pull output stages with BD441.

NPN Complimentary Transistor

• The complementary NPN transistor for BD442 is BD441. Together, they are often used in Class AB push-pull audio amplifier circuits for efficient and low-distortion performance.

Equivalent Transistors of BD442 PNP Transistor

• BD438, BD434, 2N5193, TIP42, MJE2955, and MJ2955 can be used as alternatives depending on the voltage, gain, and power requirements of the circuit.

Datasheet of BD442 PNP Transistor

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