1N249A

Single Diodes Overview

The Microchip Technology 1N249A is a silicon power rectifier diode designed for high-current applications. It features a maximum DC reverse voltage (Vr) of 100 V and an average rectified forward current (Io) of 40 A. The device utilizes a DO-5 (DO-203AB) stud mount package with glass passivated die construction. Key electrical specifications include a maximum forward voltage of 1.19 V at 90 A and a peak surge current rating of 800 A. The component exhibits a low leakage current, typically specified at 10 uA.

Single Diodes Feature Summary

• Glass passivated die construction for enhanced reliability
• Stud mount configuration in DO-5 package for efficient thermal management
• High surge current capability rated at 800 A
• Low cost non-RoHS compliant packaging option

Single Diodes Applications

• Industrial power supply rectification
• Battery charging circuits
• General purpose power conversion systems

Single Diodes Procurement Notes

Verify the specific manufacturer source, as historical data indicates production by Microsemi Corporation prior to acquisition by Microchip Technology. Confirm compliance requirements regarding the non-RoHS package designation if environmental regulations apply to your assembly process. Ensure the stud mount interface matches your heatsink or chassis mounting hardware specifications before procurement.

Single Diodes Selection Notes

Select this component when a robust, high-current single-phase rectifier is required for industrial environments. The 40 A continuous current rating and 800 A surge capacity make it suitable for heavy-duty loads. Consider the DO-5 stud mount form factor for direct chassis mounting applications where board space is limited but thermal dissipation needs are high.

Single Diodes Part Context

The 1N249A belongs to the standard silicon power rectifier family, historically associated with Microsemi Corporation specifications before corporate integration. It represents a legacy part number widely used in established industrial designs requiring reliable high-current rectification. The transition to Microchip Technology maintains the technical specifications while updating manufacturing and support structures.

Single Diodes Replacement Considerations

Direct substitutes may include other 1N249A variants from different manufacturers such as New Jersey Semi-Conductor Products, Inc., provided they meet the identical 100 V / 40 A / DO-5 specifications. Verify pinout compatibility and thermal resistance characteristics when cross-referencing with generic equivalents.