AU1PKHM3/85A

Overview

The AU1PKHM3/85A is an avalanche-rated Schottky rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum DC reverse voltage (Vr) of 800 V and an average forward rectified current (Io) of 1 A. The device utilizes the DO-220AA (SMP) surface-mount package. Key electrical specifications include a forward voltage (Vf) of 1.85 V at 1 A, a reverse leakage current of 200 µA at 20 V, and a capacitance of 130 pF at 4 V and 1 MHz. It is classified as a fast recovery diode with a reverse recovery time of less than or equal to 500 ns for currents greater than 200 mA.

Feature Summary

• Engineered with avalanche capability to withstand transient energy events without failure
• Utilizes low-loss Schottky barrier technology for high efficiency
• Designed for surface-mount assembly in compact electronic circuits

Applications

• High-voltage power supply output rectification
• Freewheeling diodes in switching mode power supplies
• Protection against voltage spikes in inductive load circuits

Procurement Notes

Verify the specific suffix and marking codes on the component body to confirm the 800V avalanche rating. Ensure the ordering part number matches the exact Vishay designation. Confirm RoHS compliance status through the official datasheet. Validate that the supplier provides traceable documentation for automotive or industrial grade requirements if applicable.

Selection Notes

Select this component when circuit design requires both high blocking voltage and surge immunity. The avalanche rating distinguishes it from standard Schottky diodes which may fail under similar stress conditions. Consider the thermal management capabilities of the DO-220AA package for the expected operating current. Verify that the 1A current rating meets the peak and RMS load requirements of the application.

Part Context

This device belongs to the eSMP series of surface-mount Schottky rectifiers from Vishay. It is part of a family designed for high-reliability applications requiring robust performance in harsh electrical environments. The product line emphasizes miniaturization while maintaining high voltage handling capabilities for modern power electronics.

Replacement Considerations

Direct substitutes must match the 800V Vr, 1A Io, and avalanche characteristics. Verify pinout compatibility with the DO-220AA footprint. Check equivalent Vf and leakage specifications to ensure no performance degradation in the target circuit.