BC548, NPN General-Purpose Transistor, TO-92

The BC548 is a small signal NPN bipolar junction transistor used for switching and signal amplification applications. It is widely used in electronics development due to its moderate voltage/current ratings, low noise, and ease of use in breadboards or PCBs. It is an improved version of the older BC108 series.

Key Features:

• General-Purpose Use: Ideal for low current, medium voltage switching and amplification.
• High Gain Variants: Available in gain groups A (low), B (medium), and C (high).
• Collector-Emitter Voltage: Handles up to 30V (V_CEO).
• Low Noise Characteristics: Suitable for audio preamplifiers and signal circuits.
• Compact TO-92 Package: Easy integration for breadboards and through-hole PCBs.
• Complementary Pair: Often used with BC558 (PNP) for amplifier stages.

Additional Specifications:

• Type: NPN
• Max Voltage: 30V
• Max Current: 100Ma