AS4PGHM3_A/H

Overview

The AS4PGHM3_A/H is a single standard recovery rectifier from Vishay Semiconductors, utilizing silicon technology in an SMPC (TO-277A-3) surface-mount package. It features a 400 V repetitive reverse voltage rating and supports a continuous forward current of 4 A. The device exhibits a maximum forward voltage of 920 mV at rated current and handles a peak non-repetitive surge current of 100 A. Reverse leakage current is specified at 350 nA, with a typical reverse recovery time of 1.8 µs. It operates within a junction temperature range of -55 °C to +175 °C and holds AEC-Q101 qualification for automotive reliability.

Feature Summary

• Avalanche-rated construction designed for robust performance under inductive switching conditions
• Glass passivated chip junction providing stable electrical characteristics and long-term reliability
• Controlled avalanche characteristics ensuring safe operation during transient overvoltage events
• Low profile surface-mount design optimized for automated placement and high-density PCB layouts

Applications

• Automotive power supply circuits requiring AEC-Q101 qualified components
• General-purpose rectification in industrial power conversion systems
• Freewheeling diode applications in inductive load protection
• High-temperature environments necessitating extended junction temperature ratings

Procurement Notes

Verify the specific suffix configuration against the manufacturer's official datasheet to ensure compatibility with required packaging and marking specifications. Confirm that the SMPC package dimensions align with the target PCB footprint before finalizing procurement. Ensure that the AEC-Q101 qualification status meets the specific reliability standards mandated by the end application environment.

Selection Notes

Select this component when a standard recovery rectifier with avalanche capability is required for high-current applications. The 4 A current rating and 400 V blocking voltage make it suitable for medium-power DC-DC converters. Consider the 1.8 µs reverse recovery time for switching frequency constraints. The TO-277A-3 package offers thermal advantages over smaller footprints while maintaining low profile requirements.

Part Context

This part belongs to Vishay's eSMP series of high current density standard avalanche surface mount rectifiers. The series is characterized by very low profile dimensions and glass passivated chip junctions. These devices are engineered for automated placement processes and meet MSL level 1 moisture sensitivity requirements. The product line complies with RoHS directives and WEEE regulations, supporting environmentally conscious manufacturing practices.

Replacement Considerations

Direct replacements must match the 4 A current rating, 400 V reverse voltage, and SMPC (TO-277A-3) package outline. Verify that substitute parts also offer avalanche ruggedness if the application involves inductive switching. Ensure equivalent or better reverse recovery time and forward voltage characteristics to maintain circuit efficiency and thermal performance.