BC548A

Single Bipolar Transistors Overview

The Diotec Semiconductor BC548A is a general-purpose NPN silicon planar epitaxial transistor designed for commercial and industrial applications. It operates with a collector current of 100 mA, a collector-emitter voltage of 30 V, and power dissipation of 500 mW. The device features three distinct DC current gain groups (A, B, C) offering minimum hFE values of 110, 200, and 420 respectively at IC = 2 mA. Key electrical characteristics include a transition frequency of 300 MHz, a collector-base capacitance of 6 pF maximum, and a junction temperature range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• Three selectable current gain groups (A, B, C) for precise amplification requirements
• General-purpose design suitable for signal processing, switching, and amplification
• Compliant with RoHS, REACH regulations, and Conflict Minerals standards

Single Bipolar Transistors Applications

• Signal processing circuits
• Electronic switching applications
• Amplification stages in commercial and industrial equipment

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix when purchasing. Suffixes such as -Q indicate AEC-Q101 compliance, while -AQ denotes qualification status. Confirm packaging preferences, as standard versions are supplied in ammo packs, while bulk options may require specific suffixes like BK. Ensure the selected variant matches the required reliability grade for the target application environment.

Single Bipolar Transistors Selection Notes

Select the appropriate current gain group based on circuit sensitivity: Group A provides a minimum hFE of 110, Group B offers 200, and Group C delivers 420 at IC = 2 mA. Consider the complementary PNP transistors from the BC556 through BC559 series if matched pairs are required. Verify that the 30 V collector-emitter voltage rating aligns with the maximum operating conditions of the intended circuit design.

Single Bipolar Transistors Part Context

The BC548A belongs to the BC546...BC549 family of universal NPN transistors manufactured by Diotec Semiconductor. This series shares common mechanical data, including the TO-92 plastic case and UL 94V-0 flammability rating. The component is part of a broader portfolio of discrete semiconductors produced by Diotec, which specializes in standard and customized solutions for industrial, energy, mobility, and consumer electronics markets.

Single Bipolar Transistors Replacement Considerations

The BC549A is documented as a parameter-equivalent substitute within the same manufacturer's lineup. When replacing the BC548A, verify that the alternative meets the 30 V collector-emitter voltage requirement and maintains compatible current gain specifications for the specific application context.

Single Bipolar Transistors FAQ

What are the available DC current gain groups for the BC548A?

The BC548A is available in three current gain groups: Group A (minimum hFE 110), Group B (minimum hFE 200), and Group C (minimum hFE 420), measured at IC = 2 mA and VCE = 5 V.

Is the BC548A suitable for automotive applications?

Standard versions are rated for commercial/industrial use. Automotive-grade variants are available with specific suffixes: -Q indicates AEC-Q101 compliance, and -AQ indicates AEC-Q101 qualification.

What is the recommended complementary PNP transistor?

The recommended complementary PNP transistors are the BC556, BC557, BC558, and BC559 series.