BC548BU

Single Bipolar Transistors Overview

The BC548BU is an NPN silicon epitaxial planar transistor manufactured by Fairchild Semiconductor. It is housed in a lead-free TO-92 package with three pins. The device supports a maximum collector current of 0.1 A and a collector-emitter voltage of 30 V. It features a minimum DC current gain (hFE) of 200 at 2 mA and 5 V. The component operates within a junction temperature range up to 150 °C and complies with RoHS standards.

Single Bipolar Transistors Feature Summary

• NPN silicon epitaxial planar construction for reliable small-signal performance
• Lead-free TO-92 packaging compliant with environmental directives
• High DC current gain suitable for amplifier applications
• Low noise characteristics optimized for signal processing

Single Bipolar Transistors Applications

• General purpose switching circuits
• Audio pre-amplification stages
• Signal processing in consumer electronics

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer datasheet for the BC548BU, as availability varies. Confirm RoHS compliance status and pinout configuration against the official Fairchild documentation. Ensure the ordering suffix corresponds to the desired gain bin and packaging format before procurement.

Single Bipolar Transistors Selection Notes

Select this component when a standard NPN transistor with moderate gain and low voltage ratings is required. Consider the TO-92 through-hole package for prototyping or legacy board designs. Verify that the hFE bin matches the circuit requirements for consistent amplification factors.

Single Bipolar Transistors Part Context

The BC548 series comprises general-purpose NPN transistors widely used in electronic circuits. The BU suffix typically denotes a specific gain bin and packaging variant within the Fairchild product line. This part belongs to the broader family of small-signal bipolar junction transistors designed for low-power applications.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include BC548BTA and BC548TF from various manufacturers. Ensure the replacement maintains the same NPN polarity, TO-92 package, and electrical ratings. Verify that the gain bin of the substitute meets the original design specifications.