1N3291

Single Diodes Overview

The 1N3291 is a standard recovery rectifier diode manufactured by Microchip Technology. It features a maximum DC reverse voltage of 400 V and an average forward current rating of 100 A. The device utilizes a DO-205AA (DO-8) stud-mount package, designed for high-power applications. Key electrical characteristics include a maximum reverse leakage current of 10 mA at 400 V and a typical forward voltage drop of 1.55 V at 310 A. The junction temperature range spans from -65°C to 200°C.

Single Diodes Feature Summary

• High current handling capability with a 100 A average forward current rating
• Robust thermal performance supporting junction temperatures up to 200°C
• Standard recovery speed suitable for general-purpose rectification
• Stud-mount construction for efficient heat dissipation

Single Diodes Applications

• Industrial power supplies
• Motor drive rectification circuits
• Welding equipment power stages
• Heavy-duty battery charging systems

Single Diodes Procurement Notes

Verify the specific suffix designation when ordering, as variants such as 1N3291R exist with identical electrical ratings but may differ in packaging or manufacturing lot details. Confirm RoHS compliance status prior to integration, as legacy series components often fall outside current environmental directives. Ensure the procurement documentation explicitly references the Microchip Technology part number to avoid substitution errors with generic equivalents.

Single Diodes Selection Notes

Select this component for applications requiring high surge current capacity and robust thermal management via stud mounting. Evaluate the 400 V reverse voltage rating against peak inverse voltage transients in the circuit. Consider the 1.55 V forward voltage drop for efficiency calculations at high load currents. Verify that the mechanical mounting interface matches the DO-205AA flange dimensions for proper thermal contact.

Single Diodes Part Context

The 1N3291 belongs to the legacy 1N32xx series of high-power silicon rectifiers produced by Microchip Technology. This series is characterized by rugged construction and high current capabilities, making it suitable for demanding industrial environments. The component represents a standard industry form factor for stud-mounted diodes, ensuring compatibility with existing heatsink designs and mechanical assemblies.

Single Diodes Replacement Considerations

Cross-reference with other 100 A, 400 V stud-mount rectifiers from manufacturers like Vishay or Littelfuse. Ensure equivalent forward voltage and reverse leakage specifications are met. Verify mechanical footprint compatibility with the DO-205AA package before substituting.