BZX585-B18-QX

Single Zener Diodes Overview

The Nexperia BZX585-B18-QX is a general-purpose Zener diode from the BZX585-Q series, housed in an SOD523 (SC-79) ultra-small flat lead Surface-Mounted Device plastic package. It features a nominal working voltage of 18 V with a ±2% tolerance range. The device supports a total power dissipation of up to 300 mW and a non-repetitive peak reverse power dissipation of 40 W. It operates within a junction temperature range of -65 °C to +150 °C.

Single Zener Diodes Feature Summary

• Qualified according to AEC-Q101 for automotive applications
• Encapsulated in an ultra-small SOD523 plastic SMD package
• Low differential resistance characteristics

Single Zener Diodes Applications

• General regulation functions

Single Zener Diodes Procurement Notes

Verify the specific suffix 'QX' against official Nexperia documentation to confirm packaging details such as reel or cut tape configuration. Ensure the component meets AEC-Q101 requirements if intended for automotive use. Confirm that the SOD523 package dimensions align with the target PCB footprint design constraints.

Single Zener Diodes Selection Notes

Select this component when a precise 18 V reference with tight ±2% tolerance is required in space-constrained designs. The BZX585-B variant offers superior accuracy compared to the C series. Consider the low thermal resistance and small form factor for high-density circuit layouts where standard packages are unsuitable.

Single Zener Diodes Part Context

This part belongs to the BZX585-Q series of voltage regulator diodes manufactured by Nexperia. The series comprises 74 types covering nominal voltages from 2.4 V to 75 V. The 'B' designation indicates the ±2% tolerance series, while the '-QX' suffix typically denotes specific packaging options within the Q-series automotive qualification line.

Single Zener Diodes Replacement Considerations

Direct substitutes include other BZX585-B18 variants from Nexperia, such as BZX585-B18-Q or BZX585-B18. Cross-manufacturer replacements must match the 18 V nominal voltage, SOD523 package, and ±2% tolerance specifications.