AS1FM-M3/H

Overview

The AS1FM-M3/H is a standard avalanche surface-mount rectifier manufactured by Vishay General Semiconductor. It features a maximum repetitive peak reverse voltage of 1000 V and an average forward current rating of 1.5 A. The device supports a peak forward surge current of 30 A and operates within a junction temperature range of -55 °C to +175 °C. Packaged in the SMF (DO-219AB) case, it utilizes glass passivated pellet chip junction technology.

Feature Summary

• Features low forward voltage drop and low reverse current characteristics
• Includes avalanche capability for energy absorption applications
• Compatible with automated placement and wave or reflow soldering processes
• Constructed with a glass passivated pellet chip junction

Applications

• General purpose rectification in power supplies
• Inverter and converter circuits
• Freewheeling diodes for consumer electronics
• Automotive electronic systems
• Telecommunication equipment

Procurement Notes

Verify the specific ordering code against the manufacturer's documentation to ensure correct grade selection. The base part number suffix M3 indicates commercial grade compliance, while HM3 denotes automotive grade qualification. Confirm package dimensions and terminal plating specifications match the design requirements before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high reverse voltage blocking capabilities in a compact surface-mount form factor. The avalanche rating allows for robustness against transient energy events. Ensure thermal management strategies account for the specified thermal resistance values under expected operating conditions and ambient temperatures.

Part Context

This device belongs to the eSMP series of standard avalanche rectifiers from Vishay. It shares the SMF package outline with other variants in the family but is distinguished by its 1000 V reverse voltage rating. The product line includes multiple voltage options ranging from 200 V to 1000 V within the same physical footprint.

Replacement Considerations

AS1FMHM3/H