BZX84-A18-QR

Single Zener Diodes Overview

The Nexperia BZX84-A18-QR is a low-power voltage regulator diode housed in a SOT-23 (TO-236AB) surface-mounted device plastic package. It belongs to the normalized E24 series with a nominal working voltage of 18 V and a tolerance of ±1 %. The device operates within an ambient temperature range of -55 °C to +150 °C, featuring a total power dissipation of 250 mW at Tamb ≤ 25 °C. Key electrical characteristics include a maximum forward voltage of 0.9 V at IF = 10 mA, a reverse current of 45 μA at VR = 18 V, and a non-repetitive peak reverse power dissipation of 40 W.

Single Zener Diodes Feature Summary

• Qualified according to AEC-Q101 for automotive applications
• Provides precise voltage regulation with ±1 % tolerance
• Compact SOT-23 surface-mount package design

Single Zener Diodes Applications

• General regulation functions

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against official Nexperia documentation to confirm packaging details such as reel or cut tape configuration. Ensure the component meets the required AEC-Q101 qualification standards if intended for automotive use. Cross-reference the marking code KF% to validate authenticity during incoming inspection.

Single Zener Diodes Selection Notes

Select this component when a stable reference voltage near 18 V is required in space-constrained designs. The ±1 % tolerance offers higher precision compared to standard ±5 % variants. Consider the thermal resistance and power dissipation limits when designing for high ambient temperatures or dense PCB layouts.

Single Zener Diodes Part Context

This part is part of the BZX84-Q series, which includes 37 breakdown voltages ranging from 2.4 V to 75 V. The series is available in three tolerance grades: ±1 % (BZX84-A), ±2 % (BZX84-B), and approximately ±5 % (BZX84-C). All variants share the same SOT-23 package and general electrical characteristics defined in the product data sheet.

Single Zener Diodes Replacement Considerations

Compatible substitutes within the same family include BZX84-B18-QR and BZX84-C18-QR, differing primarily in voltage tolerance specifications.