BZX58550-B27X

Single Zener Diodes Overview

The Nexperia BZX58550-B27X is a low-current voltage regulator diode from the BZX58550 series, housed in an ultra-small SOD523 (SC-79) surface-mounted package. It provides a nominal working voltage of 27 V with a tolerance range of 25.65 V to 28.35 V for the -B variant. 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. Electrical characteristics include a maximum reverse current of 20.4 µA at 5 mA test current and a differential resistance of 300 Ω at IZ = 50 µA.

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.
• Features an intentional minor rise of leakage current in the -B series to optimize fast switching and noise reduction.
• Encapsulated in an ultra-small and flat SOD523 plastic SMD package suitable for high-density circuit designs.

Single Zener Diodes Applications

• Low-current general regulation functions
• Portable battery-powered applications

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details and marking codes. Ensure the selected variant matches the required voltage tolerance series, as the BZX58550 series offers distinct electrical behaviors between the ±2% and ±5% tolerance options. Confirm thermal management requirements align with the specified power dissipation limits under intended operating conditions.

Single Zener Diodes Selection Notes

Select this component when space-constrained designs require low-current zener regulation. The BZX58550-B27X is appropriate for circuits needing precise voltage referencing with minimal quiescent current draw. Consider the specific leakage current characteristics optimized for noise reduction if used in sensitive signal paths. Verify that the SOD523 package footprint fits the available PCB real estate.

Single Zener Diodes Part Context

This part belongs to the BZX58550 series of low-current voltage regulator diodes manufactured by Nexperia. The series covers a wide working voltage range from 1.8 V to 51 V in the compact SOD523 package. It is engineered specifically for modern electronics where small form factors and low power consumption are critical design constraints.

Single Zener Diodes Replacement Considerations

Direct substitutes must match the SOD523 package, 27 V nominal voltage, and similar power dissipation ratings. Verify compatibility regarding the specific leakage current profile and tolerance class, as these vary significantly between manufacturers and even within different series from the same vendor.