AR4PGHM3/87A

Overview

The AR4PGHM3/87A is a surface-mount avalanche-rated rectifier diode manufactured by Vishay General Semiconductor. It features a maximum DC reverse voltage of 400V and an average rectified forward current of 2A. The device is housed in the TO-277A (SMPC) package, designed for compact PCB layouts. It exhibits a forward voltage of approximately 1.6V at 4A and supports high surge currents. This component is engineered for robustness against avalanche energy events, making it suitable for applications requiring reliable protection against inductive load switching.

Feature Summary

• Avalanche-rated construction for enhanced reliability during transient overvoltage events
• Surface-mount design in TO-277A (SMPC) package for automated assembly
• High reverse voltage capability of 400V for medium-voltage rectification

Applications

• Inductive load protection circuits
• Flyback diodes for relay and solenoid driving
• Medium-voltage rectification in power supplies

Procurement Notes

Verify the exact suffix /87A to confirm tape-and-reel packaging configuration. Confirm RoHS compliance status as per the latest manufacturer datasheet. Check part status carefully, as availability may vary across distributors. Ensure the ordering code matches the specific avalanche rating and package variant required for your design.

Selection Notes

Select this component when avalanche ruggedness is critical for circuit survival. The 400V rating suits medium-voltage applications where standard diodes might fail under inductive kickback. The SMPC package offers thermal performance benefits over smaller SMD packages while maintaining low profile. Evaluate peak repetitive reverse voltage requirements against the 400V limit.

Part Context

This part belongs to Vishay's eSMP series of ultrafast and avalanche-rated rectifiers. It utilizes advanced silicon planar technology for stable operation. The TO-277A package provides improved thermal dissipation compared to traditional small-signal diodes. It is designed for high-reliability industrial and automotive-grade applications requiring robust transient handling.

Replacement Considerations

Direct substitutes include other Vishay avalanche diodes in the same package with matching voltage and current ratings. Verify pinout compatibility and thermal resistance values before substitution. Cross-reference with similar TO-277A avalanche diodes from other manufacturers if supply constraints exist.