PDZ4.3B-QZ

Single Zener Diodes Overview

The PDZ4.3B-Q is a single Zener diode from the Nexperia PDZ-B-Q series, housed in an SOD-323 (SC-76) surface-mounted package. It provides a nominal working voltage range of 4.17 V to 4.48 V at a test current of 5 mA. The device features a total power dissipation of 400 mW and a tolerance of approximately ±2%. Key electrical characteristics include a maximum differential resistance of 90 Ω at 0.5 mA, a reverse current of 3 μA at 1 V, and a non-repetitive peak reverse current of 8.0 A for pulses up to 100 μs.

Single Zener Diodes Feature Summary

• Qualified according to AEC-Q101 standards for automotive applications
• Features very low dynamic impedance and hard breakdown knee characteristics
• Designed for general voltage regulation in small plastic packages

Single Zener Diodes Applications

• General voltage regulation
• Automotive electronic circuits
• Voltage reference functions

Single Zener Diodes Procurement Notes

Verify the specific part number suffix against official Nexperia documentation to confirm exact tolerance and testing grades. Confirm that the required operating temperature range aligns with the specified junction limits. Ensure design safeguards are implemented to prevent exposure to absolute maximum ratings, as exceeding these values causes permanent damage. Consult the most recent product data sheet before initiating any design implementation.

Single Zener Diodes Selection Notes

Select this component when a compact SMD solution with tight voltage tolerance is required for automotive or industrial environments. The SOD-323 package offers space efficiency for high-density circuit designs. Consider the specific dynamic impedance and leakage current requirements relative to the operating current. Verify compatibility with standard surface-mount reflow or wave soldering processes using the provided footprint dimensions.

Single Zener Diodes Part Context

This device belongs to the PDZ-B-Q series of low-power general-purpose voltage regulator diodes. The series encompasses various nominal voltages from 2.4 V to 36 V within the E24 range. All variants share the same SOD-323 package and AEC-Q101 qualification, providing a standardized platform for voltage regulation across different voltage requirements in automotive and commercial electronics.

Single Zener Diodes Replacement Considerations

Direct substitutes within the PDZ-B-Q series include other voltage variants such as PDZ3.9B-Q or PDZ4.7B-Q if voltage levels differ. Cross-series replacements like the PZU4.3B3 may be considered but require verification of package compatibility and thermal performance differences.