BZX58550-B4V3-QX

Single Zener Diodes Overview

The Nexperia BZX58550-B4V3-QX is a low-current voltage regulator diode in an SOD523 (SC-79) surface-mounted package. It features a nominal working voltage of 4.3 V with ±2% tolerance, specified at a test current of 50 µA. The device supports a total power dissipation of up to 300 mW and operates within a junction temperature range of -55 °C to +150 °C. It is qualified according to AEC-Q101 for automotive applications.

Single Zener Diodes Feature Summary

• Designed for low bias and portable battery-powered applications due to specification at a low test current of 50 µA.
• Includes intentional minor rise of leakage current for optimized fast switching and noise reduction.
• Qualified according to AEC-Q101 standards for use in automotive applications.

Single Zener Diodes Applications

• Low-current general regulation functions

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix matches the required packaging configuration. Confirm that the component meets the necessary AEC-Q101 qualification requirements for your target application environment. Ensure compatibility with the SOD523 footprint during PCB layout review.

Single Zener Diodes Selection Notes

Select this component when precise voltage regulation is required under low current conditions. The ±2% tolerance series offers tighter voltage accuracy compared to standard variants. Consider the low test current specification for battery-operated designs where minimizing quiescent current is critical.

Single Zener Diodes Part Context

This part belongs to the BZX58550-Q series of low-current voltage regulator diodes. The series provides a wide range of nominal working voltages from 1.8 V to 51 V in an ultra-small plastic SMD package. The 'Q' designation indicates automotive qualification.

Single Zener Diodes Replacement Considerations

BZX58550-B4V3-Q

Single Zener Diodes FAQ

What is the differential resistance for the BZX58550-B4V3-Q?

The maximum differential resistance is 600 Ω at IZ = 50 µA, 95 Ω at IZ = 1 mA, and 4.0 Ω at IZ = 5 mA.

Does this diode have a positive or negative temperature coefficient?

The BZX58550-B4V3-Q has a negative temperature coefficient, ranging from -2.7 mV/K to 0 mV/K depending on the specific operating condition.