AS4PMHM3_A/H

Overview

The AS4PMHM3_A/H is a single standard recovery rectifier manufactured by Vishay Semiconductors. It features a 1 kV repetitive peak reverse voltage and a 4 A average forward current rating. The device utilizes the SMPC (TO-277A) surface-mount package. Key electrical parameters include a maximum forward voltage of 920 mV, a reverse leakage current of 350 nA, and a typical recovery time of 1.8 µs. It supports a surge current of 100 A and operates within a junction temperature range of -55 °C to +175 °C. The component holds AEC-Q101 qualification for automotive applications.

Feature Summary

• Avalanche rated capability for robust operation in inductive switching environments
• High thermal stability with an extended operating junction temperature up to 175 °C
• Automotive grade reliability certified under AEC-Q101 standards

Applications

• Automotive power supply circuits requiring high voltage isolation
• General purpose rectification in industrial equipment
• DC-DC converter output stages

Procurement Notes

Verify the specific suffix designation against the manufacturer's official documentation to confirm exact binning or testing variations. Ensure that the ordering information matches the required packaging format, such as reel quantities, as specified in the latest datasheet revision. Cross-reference the part number with the authorized distributor list to guarantee authenticity and traceability.

Selection Notes

Select this component when a standard recovery diode with avalanche ruggedness is required for high-voltage applications. The TO-277A package offers a compact footprint suitable for space-constrained designs. Consider the 1.8 µs recovery time for frequency limitations and ensure the thermal management strategy accommodates the 175 °C maximum junction temperature rating.

Part Context

This part belongs to the AS4P series of surface-mount rectifiers from Vishay. The series is designed to replace larger through-hole components while maintaining high voltage ratings. The inclusion of avalanche capability distinguishes it from standard non-avalanche rectifiers in the same current and voltage class.

Replacement Considerations

Direct substitutes must match the 1 kV rating, 4 A current capacity, and TO-277A package. Verify if the replacement requires avalanche capability or if standard recovery characteristics are sufficient for the specific circuit application.