1N1197A

Single Diodes Overview

The Microchip Technology 1N1197A is a standard recovery silicon rectifier diode designed for high-power applications. It features a maximum DC reverse voltage (Vr) of 500 V and an average forward current (Io) rating of 40 A. The device utilizes a DO-203AB (DO-5) stud mount package, facilitating robust thermal management and mechanical stability in industrial environments. Key electrical characteristics include a maximum forward voltage of 1.19 V at 90 A and a reverse leakage current of 10 µA at 500 V. It operates within a junction temperature range of -65°C to +200°C.

Single Diodes Feature Summary

• High thermal resistance capability enabled by the stud mount DO-203AB package design
• Standard recovery speed suitable for general-purpose power conversion
• Wide operating junction temperature range extending up to 200°C

Single Diodes Applications

• Industrial power supply rectification
• Battery charging systems
• Motor drive circuits

Single Diodes Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified partners. Confirm RoHS compliance status as the datasheet indicates non-compliance. Validate the specific manufacturing lot against the latest Product Change Notification (PCN) documentation regarding packaging label changes issued in June 2025. Ensure the ordering suffix matches the required package variant.

Single Diodes Selection Notes

Select this component when a 40 A continuous current rating and 500 V blocking voltage are required in a stud-mount configuration. Consider the 1.19 V forward voltage drop for thermal calculations at peak load currents. Evaluate the DO-203AB footprint compatibility with existing heatsink infrastructure. Compare performance metrics against alternative standard recovery diodes if lower forward voltage or faster switching speeds are necessary for the specific application topology.

Single Diodes Part Context

The 1N1197A belongs to the 1N1197 series of standard recovery rectifiers manufactured by Microchip Technology. This series is characterized by rugged silicon construction and high surge current handling capabilities. The part is commonly used in medium-to-high power electronic systems where reliable rectification under harsh thermal conditions is critical. It serves as a direct replacement for legacy components in established industrial designs requiring equivalent electrical specifications.

Single Diodes Replacement Considerations

Cross-reference with other manufacturers' equivalents such as Digitron 1N1189A for identical 40 A / 500 V specifications. Verify pinout compatibility and mounting hole dimensions before substitution. Ensure thermal interface material requirements align with the stud mount geometry.