1N3139

Single Diodes Overview

The Microchip Technology 1N3139 is a silicon power rectifier diode designed for high-current applications. It features a stud mount configuration within the DO-205AA (DO-8) package, facilitating robust thermal management and secure mechanical attachment to heat sinks. The device supports a maximum repetitive peak reverse voltage of 50 V and handles a continuous forward current of 100 A. Key electrical characteristics include a forward voltage drop of 1.2 V at rated current, a reverse leakage current of 50 µA at 350 V, and a maximum surge current capability of 1.6 kA. The operational temperature range extends from -65 °C to specified limits.

Single Diodes Feature Summary

• High current handling capability suitable for demanding power conversion tasks
• Stud mount construction ensures stable mechanical fixation and efficient heat dissipation
• Silicon rectifier technology provides reliable performance in harsh environments

Single Diodes Applications

• Industrial power supply rectification
• Motor drive circuits
• Welding equipment power stages

Single Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N3139 designation has been produced by multiple entities including Microsemi and Solid State Inc. Confirm that the received component matches the required DO-205AA stud mount package and terminal configuration. Ensure datasheet specifications align with your circuit requirements regarding voltage ratings and thermal resistance before integration.

Single Diodes Selection Notes

Select this component when designing systems requiring high continuous current capacity with a simple mounting solution. The stud mount style is preferred over leaded packages for higher power densities where direct heatsink contact is necessary. Evaluate thermal management strategies carefully, as the device relies on external cooling infrastructure to maintain junction temperatures within safe operating limits during high-load conditions.

Single Diodes Part Context

This part belongs to the family of standard silicon power rectifiers used in industrial electronics. Historically associated with manufacturers like Microsemi and Solid State Inc., it serves as a fundamental building block for converting AC to DC in heavy-duty applications. The DO-8 package is a legacy form factor still utilized in equipment designed for long-term reliability and serviceability.

Single Diodes Replacement Considerations

Cross-reference with other 100 A, 50 V stud-mount rectifiers. Verify pinout compatibility and thermal interface dimensions. Ensure substitute parts meet or exceed the 1.6 kA surge current rating and 1.2 V forward voltage specification.