BC547A

Single Bipolar Transistors Overview

The BC547A is an NPN epitaxial silicon transistor from the BC546-BC550 series, manufactured by onsemi. It features a collector-emitter voltage of 45 V and a maximum DC collector current of 100 mA. The device operates with a junction temperature up to 150 °C and dissipates 500 mW of power. It utilizes a TO-92-3 package for through-hole mounting. The 'A' suffix designates a DC current gain (hFE) range of 110 to 220 at 2 mA and 5 V. The component exhibits a transition frequency of 300 MHz and low noise characteristics suitable for general-purpose applications.

Single Bipolar Transistors Feature Summary

• Designed for switching and amplifier circuits
• Complements PNP transistors in the BC556-BC560 series
• Utilizes NPN epitaxial silicon construction

Single Bipolar Transistors Applications

• General-purpose switching
• Amplifier circuits
• Low-noise signal processing

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor parts are now integrated into the onsemi portfolio. Confirm that the ordering nomenclature aligns with current system requirements following the integration process. Ensure compliance with RoHS standards and verify the authenticity of the supply chain to avoid counterfeit components.

Single Bipolar Transistors Selection Notes

Select this component when a moderate DC current gain between 110 and 220 is required for amplification tasks. The 45 V collector-emitter rating suits standard low-voltage logic and analog circuits. Consider the complementary BC557A for designs requiring matched PNP/NPN pairs within the same gain bin.

Single Bipolar Transistors Part Context

This part belongs to the BC546 through BC550 family of NPN epitaxial silicon transistors. The series provides various voltage ratings and gain classifications to support diverse electronic design needs. The BC547 variant specifically offers a 45 V breakdown voltage, distinguishing it from higher or lower voltage siblings in the lineup.

Single Bipolar Transistors Replacement Considerations

• MMBT100
• 2N5232A

Single Bipolar Transistors FAQ

What is the DC current gain range for the BC547A?

The BC547A classification specifies a minimum hFE of 110 and a maximum of 220 when measured at IC = 2 mA and VCE = 5 V.

Is the BC547A suitable for high-frequency applications?

Yes, the device has a current gain-bandwidth product (fT) of 300 MHz, making it appropriate for radio frequency and audio frequency signal processing.

How does the BC547A relate to the BC557A?

The BC547A is the NPN counterpart to the BC557A PNP transistor. They form a complementary pair designed for use in push-pull amplifier stages and differential circuits.