BZX8450-B5V1-QR

Single Zener Diodes Overview

The Nexperia BZX8450-B5V1-QR is a low-current voltage regulator diode housed in an SOT-23 (TO-236AB) surface-mount package. It features a nominal Zener voltage of 5.1 V with a ±2% tolerance, tested at a low current of 50 µA. The device has a total power dissipation of 250 mW and a non-repetitive peak reverse power dissipation of 40 W. Electrical characteristics include a maximum forward voltage of 0.9 V at 10 mA, a differential resistance of 60 Ω at 5 mA, and a reverse leakage current of 3.7 µA at 5 mA. Operating temperatures range from -55 °C to +150 °C.

Single Zener Diodes Feature Summary

• Qualified according to AEC-Q101 for automotive applications
• Specified at a low test current of 50 µA for portable battery-powered designs
• Intentional minor rise of leakage current optimized for fast switching and noise reduction

Single Zener Diodes Applications

• Low-current general regulation functions
• Portable battery-powered applications
• Automotive electronic circuits

Single Zener Diodes Procurement Notes

Verify the specific suffix 'QR' indicates reel packaging when sourcing. Confirm the 'B' designation corresponds to the ±2% tolerance series required for the design. Ensure the component meets AEC-Q101 qualification standards if used in automotive contexts. Cross-reference the marking code '%PD' for visual identification during assembly inspection.

Single Zener Diodes Selection Notes

Select this component for designs requiring precise voltage regulation under low bias conditions. The 50 µA test current specification makes it suitable for energy-efficient portable devices where minimizing quiescent current is critical. The SOT-23 package offers a compact footprint for high-density PCB layouts. Verify thermal constraints against the 250 mW dissipation limit in enclosed environments.

Single Zener Diodes Part Context

This part belongs to the BZX8450-Q series, which provides low-current Zener diodes in the SOT-23 package. The series covers nominal voltages from 1.8 V to 51 V across ±2% and ±5% tolerance options. It serves as a compact alternative to through-hole regulators, specifically engineered for modern surface-mount assembly processes and space-constrained electronics.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same family include other BZX8450-Q variants with different voltage ratings or tolerances. For identical electrical performance, verify that replacement parts share the SOT-23 package and AEC-Q101 qualification. Generic Zener diodes may lack the specified low-test-current optimization and automotive reliability data.