1N4247US

Overview

The Microchip Technology 1N4247US is a standard recovery rectifier diode designed for through-hole and surface-mount applications. It features a single silicon element with a maximum repetitive peak reverse voltage of 600V and an average forward current rating of 1A. The device utilizes a hermetically sealed glass MELF package, ensuring reliability in harsh environments. Key electrical characteristics include a maximum forward voltage of 1.3V at 3A and a reverse leakage current of 1µA at 600V. It supports a maximum surge current of 25A and operates within a junction temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed voidless glass construction for environmental protection
• Military qualification per MIL-PRF-19500/286 standards
• High thermal stability with extended operating temperature range

Applications

• Commercial and military electronic circuits requiring high reliability
• General-purpose rectification in power supply units
• Protection circuits in aerospace and defense systems

Procurement Notes

Verify the specific suffix US indicates the MELF package variant distinct from axial lead versions. Confirm military qualification requirements against project specifications. Check for RoHS compliance status as indicated by manufacturer documentation. Ensure ordering quantities align with distributor minimums. Validate datasheet revisions for updated mechanical dimensions.

Selection Notes

Select this component when hermetic sealing and military-grade reliability are required for rectification tasks. Compare MELF footprint constraints against available PCB space. Evaluate thermal management needs given the 175°C maximum junction temperature. Consider surge current capabilities for inductive load switching scenarios. Verify compatibility with automated assembly processes for SMD packaging.

Part Context

This part belongs to the 1N4245 through 1N4249 series of standard recovery rectifiers. These devices share similar electrical ratings but differ in package types and specific voltage or current variations. The series is widely used in applications demanding robust performance under extreme conditions. Microchip Technology maintains production standards consistent with historical military specifications.

Replacement Considerations

Equivalent parts include Sensitron Semiconductor variants such as 1N4247US. Other manufacturers may offer compatible MELF rectifiers with matching 600V and 1A ratings. Verify pinout orientation and physical dimensions before substitution. Ensure reverse recovery time specifications meet circuit timing requirements.