BC 172 NPN

The BC 172 NPN is a versatile low-noise bipolar junction transistor engineered for audio frequency amplification and general switching applications. Combining dependable electrical behavior with consistent manufacturing quality, this transistor is suitable for a wide range of electronic circuits where low noise, stable gain, and reliable switching are required. Transition frequency ~100 MHz for efficient operation at higher audio and intermediate frequencies. Collector current up to 100 mA to support moderate power requirements in compact designs. Gain (hFE) from 40 to 300 providing flexible amplification across typical operating points. Collector-emitter voltage rating 30 V offering sufficient headroom for common analog and switching tasks. Low noise performance that helps preserve signal integrity in audio and precision front-end circuits. Compared with many standard transistors in its class, the BC 172 NPN delivers improved noise characteristics and an extended frequency response, which contribute to clearer audio reproduction and faster switching transitions. Its specification range supports use in small-signal amplifiers, preamplifier stages, oscillators, buffer stages, and general-purpose switching tasks in consumer and industrial electronics. Manufactured using refined semiconductor processes to minimize parasitic capacitances and maintain stable gain over temperature, the BC 172 NPN is designed for repeatable performance across production lots. Designers will find it suitable when a balance of low noise, moderate current capability, and adequate voltage rating is required for compact circuit implementations.