AS1FKHM3/I

Overview

The AS1FKHM3/I is a standard recovery rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features an 800 V maximum repetitive reverse voltage and supports a continuous forward current of 1.5 A. The device utilizes the eSMP technology and is housed in a surface-mount DO-219AB (SMF) package. Key electrical characteristics include a forward voltage of 990 mV at 1.5 A, a reverse leakage current of 140 nA at 800 V, and a typical reverse recovery time of 1.3 µs. It operates within a junction temperature range of -55°C to +175°C.

Feature Summary

• High-voltage capability with 800 V reverse voltage rating for robust blocking performance
• Extended thermal operation supporting junction temperatures up to 175°C
• Automotive-grade reliability certified under AEC-Q101 standards
• Compact surface-mount SMF packaging designed for automated assembly

Applications

• Automotive electronics requiring high-reliability rectification
• General-purpose power supply circuits
• Industrial control systems
• DC-DC converter stages

Procurement Notes

Verify the specific suffix against official documentation, as ordering codes may indicate variations in tape-and-reel specifications or manufacturing origin without altering the core electrical function. Confirm RoHS compliance status and ensure the component matches the required DO-219AB footprint for your PCB layout. Cross-reference the manufacturer part number directly with the datasheet to avoid substitution errors.

Selection Notes

Select this component when designing circuits that require high reverse voltage blocking combined with moderate current handling in a compact form factor. The 1.5 A rating and 800 V breakdown make it suitable for primary-side rectification or freewheeling applications. Ensure the thermal management strategy accommodates the specified 175°C junction limit for long-term reliability in demanding environments.

Part Context

This part belongs to Vishay's eSMP series of surface-mount rectifiers. The series is engineered to replace larger through-hole components while maintaining high reliability. The AS1FKHM3/I variant specifically targets automotive and industrial markets where space constraints and thermal resilience are critical design parameters.

Replacement Considerations

Consult official Vishay substitution guides for verified equivalents. Do not assume compatibility based solely on voltage and current ratings; verify reverse recovery time and package pinout alignment before implementation.