BC557BTFR

Single Bipolar Transistors Overview

The BC557BTFR is a PNP silicon small-signal bipolar junction transistor manufactured by onsemi. It features a maximum collector current of 100 mA and a collector-emitter breakdown voltage of 45 V. The device operates with a transition frequency of 150 MHz and a power dissipation rating of 500 mW. It provides a minimum DC current gain (hFE) of 200 at 2 mA and 5 V. The component is housed in a lead-free TO-92-3 package with molded leads, suitable for through-hole mounting.

Single Bipolar Transistors Feature Summary

• PNP silicon epitaxial construction for reliable small-signal amplification
• Lead-free packaging compliant with RoHS directives
• High DC current gain ensuring efficient signal control

Single Bipolar Transistors Applications

• General-purpose amplifier circuits
• Switching applications requiring low current handling
• Audio signal processing stages

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer lot and date code upon receipt to ensure component authenticity. Confirm that the received parts match the BC557BTFR designation exactly, as similar suffixes may indicate different packaging or minor specification variations. Check for physical damage to the TO-92 leads before integration into the circuit board assembly process.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with 45 V collector-emitter voltage and 100 mA continuous current capability is required. The 150 MHz transition frequency makes it suitable for moderate-speed switching and audio frequencies. Ensure the application design accounts for the 500 mW power dissipation limit within the operating temperature range.

Single Bipolar Transistors Part Context

This part belongs to the BC557 series of PNP transistors, which are widely used in general-purpose electronic designs. The BTFR suffix specifically denotes the tape and reel packaging format intended for automated surface mount or through-hole insertion equipment, distinguishing it from bulk or cut-tape variants.

Single Bipolar Transistors Replacement Considerations

BC557BTA and BC557BTF are documented parameter-equivalent alternatives available from onsemi.