BZX84W-B18-QX

Single Zener Diodes Overview

The Nexperia BZX84W-B18-QX is a general-purpose Zener diode from the BZX84W-Q automotive-qualified series. It operates in a SOT323 (SC-70) leadless surface-mount package with a nominal breakdown voltage of 18 V and ±5% tolerance. The device supports a total power dissipation of 275 mW at 25 °C, with a maximum junction temperature of 150 °C. Key electrical characteristics include a reverse current of 50 nA and a differential resistance of 45 Ω at IZ = 5 mA.

Single Zener Diodes Feature Summary

• Qualified according to AEC-Q101 for automotive applications
• 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 'QX' against official Nexperia documentation to confirm tape-and-reel packaging details. Confirm that the component meets the required AEC-Q101 qualification standards for your target automotive environment. Ensure compatibility with standard SOT323 footprints during PCB layout.

Single Zener Diodes Selection Notes

Select this component when an automotive-grade Zener diode with a nominal 18 V breakdown is required. The ±5% tolerance variant is suitable for general regulation tasks where tight precision is not critical. Verify that the 275 mW power dissipation rating aligns with the thermal design of the application circuit.

Single Zener Diodes Part Context

This part belongs to the BZX84W-Q series, which provides general-purpose Zener diodes in a compact SOT323 package. The series offers nominal voltages from 2.4 V to 75 V with ±2% and ±5% tolerance options. The 'Q' designation indicates qualification for automotive use, while the 'B' suffix specifies the ±5% tolerance band.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include BZX84W-C18-Q and BZX84W-C18X. These parts share identical electrical specifications and package dimensions but may differ in manufacturing site codes or reel packaging configurations.