BC857AW-QX

Overview

The BC857AW-QX is a PNP general-purpose transistor from Nexperia, designed for automotive applications. It operates in an SOT323 (SC-70) surface-mount package with a maximum collector-emitter voltage of 45 V and a continuous collector current of 100 mA. The device features a transition frequency of 100 MHz and a power dissipation rating of 200 mW. It meets AEC-Q101 qualification standards and offers three gain selection groups.

Feature Summary

• Qualified according to AEC-Q101 for automotive reliability
• Available in three distinct gain selection groups
• Ultra-small SMD plastic package design

Applications

• General-purpose switching
• Amplification circuits
• Automotive electronic systems

Procurement Notes

Verify the specific suffix code to confirm the reel quantity and gain binning configuration. Ensure the ordering part number matches the required AEC-Q101 automotive grade specification. Confirm the package variant corresponds to the SOT323 footprint requirements for the target PCB layout.

Selection Notes

Select this component when automotive qualification is mandatory for small-signal PNP applications. The SOT323 package provides space efficiency compared to larger alternatives. Consider the available gain bins to optimize circuit performance without requiring tight resistor tolerances.

Part Context

This part belongs to the BC857W-Q series, which includes complementary NPN devices like the BC847W-Q. The series is engineered for high-volume automotive manufacturing, offering consistent electrical characteristics across different production lots while maintaining a compact form factor suitable for dense board layouts.

Replacement Considerations

Direct substitutes include other AEC-Q101 qualified PNP transistors in the SOT323 package. Verify that alternative parts meet the same 45V VCEO and 100mA Ic ratings. Check for equivalent gain groupings to ensure functional parity in existing designs.