1N3903R

Single Diodes Overview

The 1N3903R is a high-reliability fast recovery rectifier diode manufactured by Microchip Technology. It is qualified per MIL-PRF-19500/308 and features a 150°C junction temperature rating with a 50 Amps current capability. The device offers reverse voltage ratings ranging from 50 to 400 Volts depending on the specific variant within the series. It utilizes a stud mount package configuration designed for robust industrial applications requiring verified performance under extreme thermal conditions.

Single Diodes Feature Summary

• Qualified per MIL-PRF-19500/308 for high reliability
• Supports 150°C junction temperature operation
• Features 50 Amps current rating capability
• Available in multiple reverse voltage levels

Single Diodes Applications

• High-reliability power conversion systems
• Industrial equipment requiring military-grade components
• Fast recovery rectification circuits

Single Diodes Procurement Notes

Verify the specific suffix designation against the official Microchip datasheet to confirm the exact reverse voltage rating, as the series spans 50V to 400V. Ensure the procurement documentation explicitly references MIL-PRF-19500/308 qualification status. Confirm the package type matches the required mechanical mounting specifications for the target application environment.

Single Diodes Selection Notes

Select this component when military-grade reliability and high thermal tolerance are mandatory. The 50A current rating supports heavy-duty rectification needs. Verify that the specific voltage variant aligns with the circuit's peak inverse voltage requirements. Consider the stud mount form factor for appropriate heat dissipation and mechanical stability in the final assembly design.

Single Diodes Part Context

This part belongs to the 1N39xx series of high-reliability fast recovery rectifiers produced by Microchip Technology. The series includes variants such as 1N3909, 1N3910, 1N3911, 1N3912, and 1N3913. These devices are engineered for demanding environments where standard commercial grade components may fail due to thermal or electrical stress.

Single Diodes Replacement Considerations

Direct substitutes include other parts qualified to MIL-PRF-19500/308 with matching 50A ratings and compatible voltage classes. Verify pinout compatibility and thermal resistance characteristics before substitution.