AR1FD-M3/I

Overview

The AR1FD-M3/I is a surface-mount fast avalanche rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features a single diode configuration in a DO-219AB (SMF) package. Key electrical parameters include a maximum repetitive reverse voltage of 200 V and an average forward rectified current of 1 A. The device exhibits a typical forward voltage of 1.25 V at 1 A and a maximum reverse leakage current of 1 µA at 200 V. It supports a maximum surge current of 30 A and has a typical reverse recovery time of 140 ns. The junction temperature range spans from -55 °C to +175 °C.

Feature Summary

• Fast avalanche recovery technology for efficient switching applications
• High thermal stability with extended operating temperature range
• Low reverse leakage current for improved efficiency
• Robust construction capable of handling high surge currents

Applications

• High-frequency DC/DC converters
• Switching power supplies
• Freewheeling diodes in inductive load circuits
• Reverse battery protection circuits

Procurement Notes

Verify the specific suffix against official Vishay documentation, as 'M3' indicates lead-free status compliant with RoHS directives. Confirm the 'I' suffix details regarding tape and reel specifications or specific packaging variants directly from the manufacturer's ordering information sheet. Ensure the component matches the DO-219AB footprint requirements for your PCB design before finalizing procurement.

Selection Notes

Select this component when a fast-recovery rectifier with avalanche capability is required in a compact surface-mount form factor. The 200 V rating suits low-voltage AC-DC conversion stages. Consider the 1 A current limit and 140 ns recovery time for frequency constraints. Compare with non-avalanche variants if transient voltage suppression is not needed in the circuit design.

Part Context

This part belongs to the AR1F series of surface-mount fast avalanche rectifiers. The series offers various voltage ratings including 200 V, 600 V, and 1000 V options within the same DO-219AB package family. These devices are designed for general-purpose rectification where fast switching and ruggedness are prioritized over ultra-low forward voltage drops found in Schottky alternatives.

Replacement Considerations

Direct substitutes within the same Vishay family include AR1FM-M3/H (1000 V) and AR1FJ-M3/H (600 V) for higher voltage applications. For lower voltage needs, verify compatibility with RS1FD-M3/I, noting differences in recovery characteristics and leakage specifications between the RS and AR series.