BC857CMTF

Overview

The BC857CMTF is a PNP silicon small-signal transistor manufactured by Fairchild Semiconductor. It features a maximum collector current of 100 mA and a collector-emitter voltage rating of 45 V. The device utilizes an SOT-23 surface-mount package with three terminals. It is designed for general-purpose amplification and switching applications, operating within a temperature range up to 150 °C.

Feature Summary

• Utilizes epitaxial die construction for reliable performance in small-signal applications.
• Comes in an ultra-small surface-mount package suitable for space-constrained designs.
• Manufactured using lead-free processes compliant with RoHS standards.

Applications

• General-purpose signal amplification
• Electronic switching circuits
• Complementary NPN pairs (with BC847 series)

Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor's discrete semiconductor business was acquired by onsemi. Ensure the component matches the specific BC857CMTF designation and SOT-23 package. Confirm RoHS compliance status and check for AEC-Q101 qualification if automotive reliability is required, as specifications may vary between original Fairchild and subsequent production sources.

Selection Notes

Select this component for low-power PNP switching or amplification tasks requiring a compact footprint. Compare against complementary NPN types like the BC847 for matched pair requirements. Verify that the 45 V breakdown voltage and 100 mA current limits align with the circuit design constraints before finalizing the selection.

Part Context

This component belongs to the BC857 family of PNP transistors, which are widely used in consumer electronics and industrial equipment. The 'C' suffix typically denotes a specific DC current gain binning category, while 'MTF' indicates the SOT-23 tape-and-reel packaging format. These devices serve as fundamental building blocks for analog and digital logic interfaces.

Replacement Considerations

• BC857CT