Infineon BC817K-25E6327: General-Purpose NPN Transistor for Switching and Amplification

The Infineon BC817K-25E6327 is a widely utilized general-purpose NPN bipolar junction transistor (BJT) designed to excel in both switching and amplification applications. Housed in a compact SOT-23 surface-mount package, this component is a cornerstone in modern electronic design, offering a reliable and cost-effective solution for controlling and modulating electrical signals.

Engineered for performance, the BC817K-25E6327 boasts a collector current (IC) rating of 500 mA, making it robust enough to drive a variety of loads, including relays, LEDs, and small motors in switching circuits. Its collector-emitter voltage (VCEO) of 45 V ensures sufficient headroom for low-voltage applications commonly found in consumer electronics, power supplies, and automotive modules. A key feature of this specific variant is its DC current gain (hFE), classified by the "-25" suffix to denote a gain range of 160 to 400 at 2 mA. This tight grouping is crucial for amplification stages, such as in audio preamplifiers or signal processing circuits, where predictable and consistent gain is necessary for maintaining signal integrity.

The transistor's low saturation voltage enhances its efficiency in switching roles, minimizing power loss and heat generation when in the fully "on" state. Furthermore, its high current gain at low currents makes it exceptionally energy-efficient, which is a critical requirement for battery-operated portable devices like remote controls, sensors, and wearable technology. The SMT package also allows for high-density PCB mounting, aligning with the trend towards miniaturization in the electronics industry.

ICGOOODFIND: The Infineon BC817K-25E6327 stands out as an exceptionally versatile and reliable surface-mount transistor. Its optimal balance of current handling, voltage tolerance, and gain characteristics makes it an ideal choice for designers seeking a single component for both switching and amplification duties in space-constrained, modern electronic applications.

Keywords: NPN Transistor, Switching, Amplification, SOT-23, Current Gain