BC858W-QF

Overview

The BC858W-QF is a PNP general-purpose bipolar junction transistor manufactured by Nexperia. It utilizes silicon technology and is housed in an SC-70 (SOT323) surface-mount package. The device supports a maximum DC collector current of 100 mA and withstands a collector-emitter voltage of 30 V. Key electrical limits include a collector-base voltage of 30 V, an emitter-base voltage of 5 V, and a collector-emitter saturation voltage of 250 mV at specified conditions. Power dissipation is rated at 200 mW, with a gain-bandwidth product of 100 MHz. It operates within a temperature range of -65°C to +150°C and holds AEC-Q101 qualification.

Feature Summary

• AEC-Q101 qualified for automotive reliability standards
• Small SC-70 plastic surface-mount package design
• PNP polarity configuration for switching and amplification

Applications

• General-purpose switching circuits
• Signal amplification stages
• Automotive electronic systems requiring qualified components

Procurement Notes

Verify the specific suffix 'QF' against official Nexperia documentation to confirm packaging orientation and reel specifications. Ensure the component meets AEC-Q101 requirements if used in automotive designs. Cross-reference the SC-70 package dimensions with standard SOT323 outlines for PCB layout accuracy. Confirm RoHS compliance status through the manufacturer's latest declaration.

Selection Notes

Select this component for applications requiring a compact PNP transistor with high voltage tolerance relative to its small footprint. The AEC-Q101 qualification makes it suitable for automotive environments where reliability is critical. Compare the 30 V rating and 100 mA current limit against circuit demands to ensure adequate headroom. Consider the SC-70 package size constraints when designing dense printed circuit boards.

Part Context

This part belongs to Nexperia's general-purpose transistor portfolio, designed for broad electronic applications. The BC858 series offers complementary NPN options, such as the BC848W, facilitating push-pull or differential circuit configurations. The Q-series designation indicates adherence to automotive quality standards, distinguishing it from standard commercial grade devices within the same electrical family.

Replacement Considerations

Direct substitutes include other AEC-Q101 qualified PNP transistors in the SC-70 package with matching 30 V and 100 mA ratings. Verify pinout compatibility and thermal characteristics before substitution. Alternative packages like SOT23 may require board redesign.