BC548

Single Bipolar Transistors Overview

The BC548 is an NPN epitaxial silicon transistor designed for switching and amplifier applications. It features a collector-emitter voltage of 30 V, a collector-base voltage of 30 V, and an emitter-base voltage of 5 V. The device supports a maximum DC collector current of 100 mA with a power dissipation rating of 500 mW. It offers a DC current gain range from 110 to 800, depending on the classification grade. The transition frequency reaches 300 MHz, and it operates at junction temperatures up to 150 °C.

Single Bipolar Transistors Feature Summary

• Suitable for general-purpose switching and linear amplifier circuits
• Complements the PNP BC558 transistor for push-pull configurations
• Manufactured using epitaxial silicon process technology

Single Bipolar Transistors Applications

• General-purpose signal amplification
• Electronic switching circuits
• Push-pull output stages utilizing complementary PNP transistors

Single Bipolar Transistors Procurement Notes

Verify the specific hFE bin (A, B, or C) required for your circuit design, as gain varies significantly between grades. Confirm that the TO-92 package orientation matches your PCB footprint. Ensure the selected part number suffix corresponds to the desired bulk, ammo, or tape-and-reel packaging format for automated assembly.

Single Bipolar Transistors Selection Notes

Select this component when a low-voltage NPN transistor is needed for standard signal processing tasks. The BC548 provides a balanced performance profile suitable for audio pre-amplifiers and logic interfacing. Consider higher voltage variants like the BC546 if operating conditions exceed 30 V collector-emitter limits.

Single Bipolar Transistors Part Context

This device belongs to the BC546 through BC550 series of NPN epitaxial silicon transistors originally developed by Fairchild Semiconductor and now managed by ON Semiconductor following corporate integration. The series shares identical physical dimensions and pinouts while varying in breakdown voltage and noise characteristics across different model numbers.

Single Bipolar Transistors Replacement Considerations

• BC547
• BC549

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage for the BC548?

The maximum collector-emitter voltage (VCEO) for the BC548 is 30 V.

Does the BC548 have low-noise characteristics?

No, the BC548 is a standard general-purpose transistor. The BC549 and BC550 models within the same series are specifically designated for low-noise applications.

How does the BC548 relate to the BC558?

The BC558 is the complementary PNP transistor to the NPN BC548, allowing them to be used together in matched pairs for push-pull amplifier stages.