BC 547 NPN

The BC 547 NPN is a widely used bipolar junction transistor for general-purpose amplification and switching applications. Engineered for reliable performance in low-current, low-power circuits, it is a common choice for both hobbyist and professional electronics projects. Collector-Emitter Voltage: 45V — suitable for moderate voltage conditions. Collector Current: 100mA — supports small-signal switching and amplification tasks. Gain Bandwidth Product: 300 MHz — enables effective operation in audio and certain radio frequency circuits. Low Noise Figure — improves signal clarity in sensitive and low-level signal applications. TO-92 Package — compact form factor for easy integration into standard circuit layouts. Manufactured from high-quality silicon with controlled production processes, the BC 547 is designed to deliver consistent current gain while maintaining thermal stability. Its characteristics provide an advantageous balance between gain and voltage ratings compared with many similar transistors, offering improved frequency response and reduced noise in applicable circuits. Because of its low noise performance and stable amplification, the BC 547 is particularly well suited to audio front ends, sensor interfaces, and general small-signal amplification. Its compatibility with standard PCB footprints and widespread availability make it straightforward to source and replace in existing designs. The BC 547 NPN remains a dependable component for projects requiring predictable small-signal behavior and modest power handling.