BC238 Transistor (25V, 0.1A)

Overview

The BC238 is a classic NPN bipolar junction transistor (BJT) renowned for its versatility and reliability in low-power electronics. It operates at a maximum collector-emitter voltage of 25V and a continuous collector current of 100mA, making it an ideal choice for signal amplification, switching, and driver stages in a wide range of hobbyist and educational projects. Its TO-92 package is compact, easy to solder, and breadboard-friendly, ensuring seamless integration into your designs.

Key Features

• NPN Silicon Transistor: Standard polarity for general-purpose applications.
• High Voltage Rating: 25V collector-emitter voltage (VCEO) and 32V collector-base voltage (VCBO).
• Current Handling: Supports up to 100mA continuous collector current (IC).
• Power Dissipation: Handles up to 625mW of power, adequate for low-power circuits.
• High DC Current Gain (hFE): Typically 120-800, providing good amplification.
• Low Noise: Suitable for audio pre-amplifier stages.
• TO-92 Package: Compact, through-hole design compatible with breadboards and PCBs.

Technical Specifications

• Type: NPN Bipolar Junction Transistor
• Collector-Emitter Voltage (VCEO): 25V
• Collector-Base Voltage (VCBO): 32V
• Emitter-Base Voltage (VEBO): 5V
• Collector Current (IC): 100mA
• Power Dissipation (PTOT): 625mW
• DC Current Gain (hFE): 120-800 (at IC = 2mA, VCE = 5V)
• Transition Frequency (fT): 150MHz (typical)
• Operating Temperature Range: -55°C to +150°C
• Package: TO-92

Applications & Use Cases

• Signal Amplification: Ideal for small-signal audio amplifiers, preamps, and sensor signal conditioning.
• Switching: Perfect for driving LEDs, relays (with flyback diode), and small DC loads in low-power switching circuits.
• Oscillator Circuits: Can be used in simple RC or LC oscillators for tone generation and clock signals.
• Educational Projects: Great for learning transistor fundamentals in school labs and university courses.
• DIY Electronics: Suitable for building hobbyist projects like light-sensitive switches, temperature alarms, and basic logic gates.

What's Included

• 1x BC238 NPN Transistor (TO-92 package)

Compatibility

• Breadboards: Directly compatible with standard 0.1" breadboards.
• Arduino & Raspberry Pi: Can be used in interfacing circuits to drive higher current loads or amplify signals.
• Replacement: A reliable drop-in replacement for BC107, BC108, BC109, and BC548 in most low-power applications (always verify pinout).

MOKWN Recommendation

For Egyptian electronics enthusiasts, the BC238 is a staple component that deserves a place in every maker's parts kit. Its low cost, ease of use, and proven performance make it an excellent choice for prototyping and learning. Whether you're a student at a university in Cairo or a hobbyist in Alexandria, this transistor will help you bring your ideas to life. Order now from MOKWN and get same-day delivery in major Egyptian cities!