BC109 General Purpose NPN Transistor – TO-18 Metal Can Package

The BC109 is a low-noise general-purpose NPN bipolar junction transistor (BJT) designed for signal amplification, audio processing, and switching applications. Housed in a rugged TO-18 metal can package, it offers excellent electrical stability, low noise performance, and reliable operation, making it suitable for audio equipment, instrumentation, communication circuits, and general-purpose electronic designs.

Key Features -

• General-purpose NPN transistor

• Low-noise silicon transistor design

• Durable TO-18 metal can package

• Suitable for amplification and switching applications

• High reliability and thermal stability

• Ideal for low-level audio and signal processing circuits

• Excellent performance in analog applications

Specifications -

• Product type - Bipolar Junction Transistor (BJT)

• Part number - BC109

• Transistor polarity - NPN

• Technology - Silicon

• Package type - TO-18 Metal Can

• Mounting type - Through Hole

• Number of terminals - 3

• Collector-Emitter Voltage (VCEO) - 20V

• Collector-Base Voltage (VCBO) - 25V

• Emitter-Base Voltage (VEBO) - 5V

• Maximum Collector Current (IC) - 200mA

• Power Dissipation - 300mW

• Transition Frequency (fT) - 150MHz

• Operating Temperature Range - -55°C to +150°C

Applications -

• Audio preamplifiers

• Low-noise amplifier circuits

• Signal processing systems

• Communication equipment

• Sensor interface circuits

• Instrumentation and measurement devices

• Educational and DIY electronics projects