AR4PKHM3_A/I

Overview

The AR4PKHM3_A/I is a fast recovery avalanche rectifier manufactured by Vishay. It features an 800 V repetitive peak reverse voltage and a 4 A average forward current rating. The device utilizes a common anode configuration within a TO-277A plastic surface-mount package. Key electrical parameters include a maximum forward voltage of 1.9 V, a reverse leakage current of 10 μA, and a reverse recovery time of 120 ns. It supports a peak non-repetitive surge current of 65 A and operates across a junction temperature range of -55 °C to 175 °C.

Feature Summary

• Fast recovery avalanche technology for high-speed switching applications
• Common anode dual diode configuration
• Surface mount construction in a compact TO-277A package

Applications

• High-frequency power supply circuits
• Free-wheeling rectification in DC-DC converters
• Snubber circuits requiring avalanche ruggedness

Procurement Notes

Verify the specific suffix against official Vishay documentation to confirm packaging details. The source material indicates availability in tape and reel formats. Ensure the ordering part number matches the required quantity multiples specified by the manufacturer. Cross-reference the datasheet for any recent product change notifications affecting pinout or specifications.

Selection Notes

Select this component when a common anode arrangement is required for high-voltage, high-speed rectification. The 800 V rating suits primary-side or high-voltage secondary applications. Consider the TO-277A package for thermal management needs in space-constrained designs. Verify that the 120 ns reverse recovery time aligns with the target switching frequency requirements.

Part Context

This component belongs to Vishay's high-performance rectifier portfolio designed for demanding power electronics environments. The AR4P series specifically addresses applications needing robust avalanche capability alongside fast switching characteristics. It serves as a specialized solution for modern switch-mode power supplies where efficiency and reliability are critical.

Replacement Considerations

Consult official substitution guides for equivalent common anode fast recovery rectifiers with matching voltage and current ratings. Verify compatibility regarding package dimensions and thermal resistance before implementation.