BZX84W-C3V9-QF

Single Zener Diodes Overview

The Nexperia BZX84W-C3V9-QF is a general-purpose Zener diode in the BZX84W-Q series, housed in a leadless SOT323 (SC-70) surface-mount package. It provides a nominal working voltage of 3.9 V with a ±5% tolerance. The device features a total power dissipation of 275 mW and operates within an ambient temperature range of -55 °C to +150 °C. Qualified under AEC-Q101 for automotive applications, it includes a non-repetitive peak reverse current capability of 6 A at 100 µs pulse duration.

Single Zener Diodes Feature Summary

• Qualified according to AEC-Q101 standards for automotive use
• Wide working voltage range from 2.4 V to 75 V
• Leadless very small Surface-Mounted Device plastic package

Single Zener Diodes Applications

• General regulation functions
• High-frequency applications

Single Zener Diodes Procurement Notes

Verify the specific suffix 'QF' against official Nexperia documentation to confirm packaging details such as reel size or tape width, as datasheets may not explicitly define every ordering variant. Ensure the design accounts for the AEC-Q101 qualification requirements if deployed in automotive environments. Confirm thermal management strategies align with the specified junction-to-ambient resistance values provided in the product data sheet.

Single Zener Diodes Selection Notes

Select this component when a compact SOT323 footprint is required for low-voltage regulation tasks. The ±5% tolerance series offers standard precision suitable for general-purpose circuits. Consider the negative temperature coefficient characteristic for voltages below 5 V when designing for wide operating temperature ranges. Verify that the 275 mW power dissipation rating meets the thermal constraints of the target PCB layout.

Single Zener Diodes Part Context

This part belongs to the BZX84W-Q series, which expands the standard BZX84 family into automotive-grade specifications. While the standard BZX84 uses the SOT23 package, the BZX84W variant utilizes the smaller SOT323 form factor. The '-Q' designation indicates compliance with automotive reliability standards, distinguishing it from commercial grade equivalents in the same voltage range.

Single Zener Diodes Replacement Considerations

Direct substitutes include other BZX84W-C3V9 variants from Nexperia, such as the commercial grade BZX84W-C3V9 without the Q suffix, provided automotive qualification is not mandatory. Cross-brand replacements must match the SOT323 package dimensions and the 3.9 V nominal voltage with compatible tolerance levels.