BC549BTF

Single Bipolar Transistors Overview

The BC549BTF is an NPN silicon epitaxial planar transistor manufactured by onsemi, housed in a TO-92 (SOT54) plastic package. It features a maximum collector current of 100 mA and a collector-emitter voltage rating of 30 V. The device offers a transition frequency of 300 MHz and a power dissipation capacity of 500 mW. Designed for low-noise applications, it provides high DC current gain with a minimum hFE of 200 at 2 mA. The component operates within a junction temperature range up to +150°C and is RoHS compliant.

Single Bipolar Transistors Feature Summary

• Low noise performance suitable for sensitive audio circuits
• High DC current gain for effective signal amplification
• Lead-free construction adhering to environmental standards

Single Bipolar Transistors Applications

• Low noise stages in audio frequency equipment
• General purpose switching and amplification circuits
• Driver stages for output transistors

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'BTF' against the official onsemi datasheet to confirm tape-and-reel packaging specifications. Ensure the selected variant matches the required hFE binning grade, as the 'B' designation indicates a specific gain range. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity.

Single Bipolar Transistors Selection Notes

Select this component when low noise characteristics are critical for the application. Compare the 30 V voltage rating against circuit requirements to ensure adequate headroom. Consider the TO-92 package constraints for thermal management if operating near the maximum power dissipation limit. Verify compatibility with complementary PNP devices like the BC559 if push-pull configurations are needed.

Single Bipolar Transistors Part Context

This transistor belongs to the BC546–BC550 series of general-purpose NPN silicon transistors. It serves as a low-noise alternative within the family, distinguished from higher voltage variants like the BC546. The device complements the BC559 PNP transistor, allowing for matched pairs in differential amplifier designs.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include the BC548B and BC547B from various manufacturers, provided the voltage ratings and gain bins align with design requirements.