BZX58550-B4V3X

Single Zener Diodes Overview

The Nexperia BZX58550-B4V3X is a low-current voltage regulator diode housed in an SOD523 (SC-79) ultra-small and flat lead Surface-Mounted Device plastic package. It features a nominal working voltage of 4.3 V with a tight tolerance of ±2%. The device is specified at a low test current of 50 μA, making it suitable for low bias applications. Key electrical characteristics include a maximum forward voltage of 0.9 V at 10 mA, a total power dissipation of 300 mW, and a non-repetitive peak reverse power dissipation of 40 W. The operating temperature range extends from -55 °C to +150 °C.

Single Zener Diodes Feature Summary

• Ultra-small and flat lead SOD523 plastic surface-mounted package design
• Tight ±2% voltage tolerance series for precision regulation
• Optimized for low bias and portable battery-powered applications via 50 μA test current specification

Single Zener Diodes Applications

• Low-current general regulation functions

Single Zener Diodes Procurement Notes

Verify the specific suffix 'B' indicates the ±2% tolerance variant against the official datasheet ordering table. Confirm the SOD523 package dimensions match the target PCB footprint requirements. Ensure the application circuit operates within the specified junction temperature limits and power dissipation constraints defined in the limiting values section.

Single Zener Diodes Selection Notes

Select this component when precise voltage reference stability is required in space-constrained designs. The ±2% tolerance offers higher accuracy than standard ±5% variants. Consider the low test current specification for battery-operated systems where minimizing quiescent current is critical. Verify that the thermal resistance characteristics support the expected ambient temperature conditions.

Single Zener Diodes Part Context

This part belongs to the Nexperia BZX58550 series of low-current voltage regulator diodes. The series provides a comprehensive range of nominal working voltages from 1.8 V to 51 V. It is designed for high-density circuit designs requiring customized protection and regulation in small scaled environments. The series includes both ±2% and approximately ±5% tolerance options.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include BZX58550-C4V3X, which shares the SOD523 package but offers approximately ±5% tolerance instead of ±2%. Other series members like BZX58550-B3V3 or BZX58550-B4V7 may be considered if different voltage levels are acceptable.