BC546A

Single Bipolar Transistors Overview

The BC546ABU is an NPN epitaxial silicon transistor from the BC546 series, manufactured by onsemi. It features a collector-emitter voltage (VCEO) of 65 V and a collector-base voltage (VCBO) of 80 V. The device supports a maximum DC collector current of 100 mA with a power dissipation rating of 500 mW. It utilizes a TO-92-3 through-hole package. The component offers a DC current gain (hFE) range of 110 to 220 for the 'A' classification. Key electrical characteristics include a transition frequency (fT) of 300 MHz and a noise figure between 2.0 dB and 10.0 dB.

Single Bipolar Transistors Feature Summary

• High-voltage capability suitable for switching and amplifier applications
• Low-noise performance for sensitive signal processing circuits
• Complementary design available within the broader BC546/BC556 family

Single Bipolar Transistors Applications

• General-purpose switching circuits
• Linear amplifier stages
• Low-noise audio pre-amplification

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the packing method. The 'BU' suffix indicates bulk packaging, while other suffixes like 'ATA' or 'BTA' denote different handling formats such as ammo pack. Ensure the selected variant matches the required assembly process and storage conditions specified in the manufacturer's datasheet.

Single Bipolar Transistors Selection Notes

Select this component when a high-voltage NPN transistor with moderate current handling is required. The 'A' grading provides a defined minimum gain threshold for predictable circuit behavior. Consider the complementary PNP counterparts if push-pull configurations are necessary. Validate thermal management requirements against the 500 mW dissipation limit during operation.

Single Bipolar Transistors Part Context

This part belongs to the BC546–BC550 series of NPN epitaxial silicon transistors originally developed by Fairchild Semiconductor and now managed by onsemi following corporate integration. The series is designed for general-purpose low-power applications. The BC546 specifically addresses designs requiring higher breakdown voltages compared to lower-rated variants in the same lineup.

Single Bipolar Transistors Replacement Considerations

Direct functional substitutes include BC547, BC548, and BC549, though their voltage ratings differ. Complementary PNP replacements are BC556, BC557, BC558, and BC559.