BC557A-AP

Single Bipolar Transistors Overview

The BC557A-AP is a PNP silicon small-signal transistor manufactured by Micro Commercial Components. It features a maximum collector current of 100 mA and a collector-emitter voltage rating of 45 V. The device operates within a temperature range of -55°C to +150°C and has a power dissipation capacity of 500 mW at 25°C ambient temperature. Key electrical characteristics include a minimum DC current gain (hFE) of 110 for the 'A' grade, a transition frequency of 150 MHz, and a collector-base voltage of 50 V.

Single Bipolar Transistors Feature Summary

• PNP polarity configuration suitable for general-purpose switching and amplification applications
• High DC current gain performance with specific binning for consistent amplification factors
• Robust thermal stability supporting operation across extended industrial temperature ranges

Single Bipolar Transistors Applications

• General-purpose signal amplification circuits
• Electronic switching applications
• Driver stages in audio equipment

Single Bipolar Transistors Procurement Notes

Verify the exact datasheet specifications provided by Micro Commercial Components for the BC557A-AP suffix variant. Confirm that the 'A' grading aligns with required hFE thresholds. Ensure the TO-92 package form factor matches the target PCB footprint. Validate RoHS compliance status if environmental regulations apply to the final assembly.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with moderate current handling and high gain is required. The BC557A-AP offers tighter gain tolerances compared to standard grades. Consider the TO-92 through-hole package for prototyping or low-volume manufacturing. Evaluate thermal management requirements given the 500 mW dissipation limit in free air conditions.

Single Bipolar Transistors Part Context

This part belongs to the BC557 series of PNP epitaxial planar transistors. It shares structural similarities with the BC556 and BC558 families but differs in breakdown voltage and gain specifications. The BC557A variant specifically targets applications requiring higher current gain consistency than the standard BC557B or C grades.

Single Bipolar Transistors Replacement Considerations

Cross-reference with BC557A from other manufacturers such as Diotec or Fairchild. Verify pinout compatibility and absolute maximum ratings before substitution.