AR1FG-M3/I

Overview

The AR1FG-M3/I is a surface-mount avalanche rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum DC reverse voltage (Vr) of 400 V and an average forward rectified current (Io) of 1 A. The device utilizes the DO-219AB (SMF) package and exhibits a fast recovery time of 140 ns. Key electrical characteristics include a maximum forward voltage (Vf) of 1.25 V at 1 A, a peak repetitive reverse voltage of 400 V, and a maximum non-repetitive peak forward surge current of 30 A. The component operates within a junction temperature range of -55°C to 175°C.

Feature Summary

• Engineered with avalanche ruggedness for enhanced reliability in harsh electrical environments
• Utilizes fast recovery technology to minimize switching losses and improve circuit efficiency
• Designed for surface-mount applications using the compact DO-219AB (SMF) package

Applications

• High-frequency switching power supplies
• Free-wheeling rectification in inductive load circuits
• Protection against voltage transients in automotive electronics

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as /H or /I may indicate differences in packaging or regional compliance standards. Confirm that the required avalanche rating aligns with the system's transient voltage specifications. Ensure the DO-219AB footprint matches the printed circuit board layout constraints. Cross-reference the manufacturer datasheet for the most current thermal derating curves and absolute maximum ratings prior to final procurement decisions.

Selection Notes

Select this component when a 400 V blocking capability and 1 A continuous current handling are required in a small surface-mount form factor. The fast recovery characteristic makes it suitable for high-frequency applications where standard rectifiers would exhibit excessive reverse recovery charge. Consider the avalanche energy rating if the application involves significant inductive kickback or transient voltage events exceeding standard breakdown limits.

Part Context

This part belongs to Vishay's AR series of avalanche rectifiers, which are designed to withstand unclamped inductive switching events. The SMF package provides a compact solution for space-constrained designs. The series is commonly used in automotive and industrial applications where robustness against voltage spikes is critical for maintaining system integrity and preventing premature component failure.

Replacement Considerations

Direct replacements must match the 400 V Vr, 1 A Io, and DO-219AB package dimensions. Verify that substitute components offer comparable avalanche ruggedness and similar reverse recovery times to ensure no degradation in circuit performance or reliability under transient conditions.