AR1FKHM3/H

Overview

The AR1FKHM3/H is a fast recovery avalanche rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features an 800 V DC reverse voltage rating and a 1 A average forward current capability. The device utilizes avalanche technology with a maximum reverse leakage current of 1 µA at 800 V. Key electrical parameters include a reverse recovery time (trr) of 120 ns, a forward voltage of 1.6 V at 1 A, and a junction capacitance of 9.3 pF at 4 V and 1 MHz. It operates within a junction temperature range of -55°C to 175°C and is housed in the DO-219AB (SMF) surface-mount package.

Feature Summary

• Incorporates avalanche technology for robust operation under transient conditions
• Fast recovery characteristics with a 120 ns reverse recovery time
• High thermal stability supporting a maximum junction temperature of 175°C
• Designed for surface-mount assembly in compact DO-219AB packages

Applications

• High-voltage switching power supplies
• Inductive load protection circuits
• Freewheeling diodes in high-frequency converters

Procurement Notes

Verify the specific suffix against official Vishay documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the datasheet revision date to validate parameter accuracy before finalizing component selection for production.

Selection Notes

Select this component when an 800 V blocking capability and 1 A continuous current are required in a small surface-mount footprint. The avalanche-rated construction makes it suitable for applications experiencing voltage spikes. Compare the 120 ns reverse recovery time against circuit switching frequencies to ensure minimal switching losses and adequate performance margins.

Part Context

This part belongs to the AR1F series of fast recovery avalanche rectifiers from Vishay. These devices are designed for general-purpose high-voltage applications requiring reliable performance in compact form factors. The series supports various voltage ratings while maintaining consistent current handling capabilities across different package options.

Replacement Considerations

Official substitutes include AR1FGHM3/H (400V), AR1FMHM3/H (1000V), and AR1FKHM3/I (tape & reel variant). Verify voltage ratings and package dimensions match before substitution.

FAQ

What is the maximum junction temperature for the AR1FKHM3/H?

The maximum operating junction temperature is 175°C.

Does the AR1FKHM3/H support avalanche operation?

Yes, the device is specifically rated as an avalanche rectifier.