1N3909R

Single Diodes Overview

The Microchip Technology 1N3909R is a high-reliability fast recovery rectifier diode designed for demanding environments. It features a 50 Ampere average forward current rating and supports repetitive peak reverse voltages ranging from 50 to 400 Volts depending on the specific device level within the series. The component utilizes a stud mount configuration in a DO-203AB (DO-5) package, ensuring robust mechanical stability. It operates with a junction temperature range of -65°C to 150°C and exhibits a maximum reverse recovery time of 200 nanoseconds.

Single Diodes Feature Summary

• Qualified per MIL-PRF-19500/308 for high reliability applications
• Hermetically sealed construction for environmental protection
• Fast recovery characteristics suitable for high-frequency switching

Single Diodes Applications

• Spacecraft power systems
• Military aircraft electronics
• Shipboard power distribution

Single Diodes Procurement Notes

Verify the specific voltage sub-type required, as the 1N3909R designation covers a range of reverse voltage ratings within the MIL-PRF-19500/308 qualified family. Confirm that the hermetic seal and stud mount form factor align with the thermal and mechanical constraints of the target assembly. Ensure compliance with the specific military qualification standards mandated by the system design requirements.

Single Diodes Selection Notes

Select this component when high reliability and radiation hardness are critical, such as in aerospace or defense projects. The choice depends on matching the specific voltage rating within the 50V to 400V range to the circuit's peak inverse voltage requirements. Consider the thermal management capabilities of the stud mount interface for effective heat dissipation during continuous operation at high current loads.

Single Diodes Part Context

The 1N3909R belongs to a family of high-reliability fast recovery rectifiers manufactured by Microchip Technology. This series includes variants like the 1N3909, 1N3910, and 1N3913, all sharing similar physical packages and electrical speeds but differing in voltage ratings. The 'R' suffix typically denotes a specific packaging or qualification variant within the military-grade product line.

Single Diodes Replacement Considerations

Direct replacements include other MIL-PRF-19500/308 qualified devices such as the 1N3909A or 1N3909AR, provided the voltage rating matches exactly. Cross-reference with other manufacturers offering hermetically sealed stud-mount fast recovery diodes meeting the same military specification.