1N3491

Single Diodes Overview

The Microchip Technology 1N3491 is a silicon power rectifier designed for medium-current applications. It features a press-fit DO-21 package, providing robust mechanical stability for high-vibration environments. The device offers a repetitive peak reverse voltage of 50 V and an average forward current rating of 35 A. It includes a 400 A surge current rating and utilizes a glass-passivated die to ensure low leakage current and soft recovery characteristics. The operational temperature range extends from -65 °C to +175 °C junction temperature.

Single Diodes Feature Summary

• Glass-passivated die construction ensures reliable operation under harsh conditions with low leakage current.
• Soft recovery characteristics minimize switching losses and electromagnetic interference during operation.
• Press-fit DO-21 package provides secure mounting and enhanced thermal dissipation capabilities.

Single Diodes Applications

• Industrial power supply rectification
• Battery charging systems
• DC motor drive circuits

Single Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N3491 designation has been produced by multiple entities including Motorola and Microsemi. Confirm that the received component matches the Microchip Technology specification sheet regarding package dimensions and electrical ratings. Ensure the part number suffix aligns with the required packaging format. Cross-reference datasheets to confirm the 35A current rating and 50V voltage rating are consistent with your design requirements before procurement.

Single Diodes Selection Notes

Select this component when a medium-current rectifier with high surge capability is required in a press-fit configuration. The 35A continuous current rating suits applications demanding significant power handling without excessive heat sinking. The 50V reverse voltage rating limits suitability to low-voltage DC systems. Consider the DO-21 package constraints for PCB layout or chassis mounting. Evaluate the 175°C junction temperature limit against ambient operating conditions to ensure adequate thermal margin.

Single Diodes Part Context

The 1N3491 belongs to the standard 1N series of silicon rectifiers, historically associated with general-purpose power conversion. While originally defined by other manufacturers like Motorola, Microchip Technology now produces variants under this designation. The DO-21 package distinguishes it from axial-leaded counterparts, offering a different form factor for industrial assembly. This component serves as a bridge between low-power signal diodes and high-power industrial rectifiers.

Single Diodes Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with generic 1N3491 equivalents from other manufacturers only if their datasheets explicitly match the 35A/50V/DO-21 specifications.