BD239 Silicon Power NPN Transistor – TO-220 Package

The BD239 is a silicon NPN power transistor designed for medium-power amplification and switching applications. With its high current handling capability, robust TO-220 package, and reliable performance, it is widely used in audio amplifiers, power supplies, voltage regulators, motor drivers, industrial control systems, and general-purpose power electronics.

Key Features -

• Silicon NPN power transistor

• Suitable for power amplification and switching applications

• High collector current capability

• TO-220 package for efficient heat dissipation

• Reliable and stable electrical performance

• Good gain characteristics for power circuits

• Easy mounting with optional heatsink support

Specifications -

• Product type - Bipolar Junction Transistor (BJT)

• Part number - BD239

• Transistor polarity - NPN

• Technology - Silicon

• Package type - TO-220

• Mounting type - Through Hole

• Number of pins - 3

• Collector-Emitter Voltage (VCEO) - 80V

• Collector-Base Voltage (VCBO) - 100V

• Emitter-Base Voltage (VEBO) - 5V

• Maximum Collector Current (IC) - 2A

• Power Dissipation (PD) - 25W

• DC Current Gain (hFE) - 25 to 160

• Transition Frequency (fT) - 3MHz

• Operating Temperature Range - -65°C to +150°C

Applications -

• Audio power amplifiers

• Power supply circuits

• Voltage regulator circuits

• Motor driver applications

• Relay and solenoid drivers

• Industrial control systems

• Battery charging circuits

• Educational and DIY electronics projects