AR4PKHM3_A/H

Overview

The AR4PKHM3_A/H is a fast recovery avalanche rectifier manufactured by Vishay Semiconductors. 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 (PowerDFN) plastic surface-mount package. Key electrical characteristics include a maximum forward voltage of 1.9 V, a reverse leakage current of 10 μA, and a peak non-repetitive surge current capability of 65 A. The junction temperature range spans from -55 °C to +175 °C, with a typical reverse recovery time of 120 ns.

Feature Summary

• Incorporates avalanche ruggedness for enhanced reliability in inductive switching applications
• Utilizes glass passivation technology to ensure stability under extreme operating conditions
• Designed for high-speed performance with fast reverse recovery characteristics

Applications

• High-frequency power supply circuits requiring avalanche tolerance
• Inductive load switching and freewheeling protection
• DC-DC converter output rectification

Procurement Notes

Verify the specific suffix designation against official Vishay documentation to confirm package type and tape-and-reel specifications. Ensure that the ordering information matches the required automotive or industrial qualification standards if applicable. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Selection Notes

Select this component when circuit designs demand high-voltage blocking capabilities combined with robust avalanche energy handling. The TO-277A package offers a compact footprint suitable for dense surface-mount layouts. Consider the thermal management requirements associated with the 4 A current rating and the specified junction temperature limits during system integration.

Part Context

This device belongs to the AR4P series of fast recovery rectifiers from Vishay. The series is characterized by its use of advanced silicon planar technology and glass passivation. These components are engineered to provide superior performance in high-reliability environments compared to standard general-purpose diodes.

Replacement Considerations

Consult official Vishay substitution guides for verified equivalents. Generic replacements may not match the specific avalanche ruggedness or reverse recovery time parameters.