BC546B

Single Bipolar Transistors Overview

The BC546B is an NPN epitaxial silicon transistor from the BC546 series, designed for switching and amplifier applications. It features a collector-emitter voltage of 65 V and a maximum DC collector current of 100 mA. The device offers a minimum DC current gain (hFE) of 200 at IC = 2 mA and VCE = 5 V, with a maximum value of 450. It has a collector-base breakdown voltage of 80 V and an emitter-base voltage rating of 6 V. The component dissipates up to 500 mW of power and operates within a junction temperature range of -65 °C to +150 °C.

Single Bipolar Transistors Feature Summary

• High-voltage capability suitable for demanding switching and amplification circuits
• Low-noise performance optimized for sensitive signal processing stages
• Complementary pairing available with the BC556 series PNP transistors

Single Bipolar Transistors Applications

• General-purpose switching circuits
• Linear amplifier stages
• Audio input stages requiring low noise characteristics

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix against the manufacturer's official database to ensure correct packaging and marking. Confirm that the part number aligns with ON Semiconductor's updated nomenclature following the Fairchild integration, as underscore characters in legacy designations may have been replaced by dashes. Ensure compliance with RoHS standards if required by the application specifications.

Single Bipolar Transistors Selection Notes

Select this component when a high-voltage NPN transistor with moderate current handling is required. The B classification provides a guaranteed minimum current gain of 200, making it suitable for applications needing consistent amplification without excessive base drive. Consider the complementary BC556B for push-pull configurations or differential pairs where matched performance is necessary.

Single Bipolar Transistors Part Context

This device belongs to the BC546 through BC550 family of NPN epitaxial silicon transistors originally developed by Fairchild Semiconductor and now managed by ON Semiconductor. The series is characterized by its TO-92 plastic package and versatility in general electronic designs. The BC546 variant specifically distinguishes itself within the lineup by offering higher voltage ratings compared to lower-voltage siblings like the BC548.

Single Bipolar Transistors Replacement Considerations

BC547B

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage for the BC546B?

The maximum collector-emitter voltage (VCEO) is 65 V.

Does the BC546B offer low-noise characteristics?

Yes, the datasheet lists low noise as a feature for the BC546 series, with a typical noise figure of 2.0 dB under specified conditions.

What is the DC current gain range for the 'B' grade?

For the BC546B, the DC current gain (hFE) ranges from a minimum of 200 to a maximum of 450 at IC = 2 mA and VCE = 5 V.