1N3909

Single Diodes Overview

The Microchip Technology 1N3909 is a high-reliability fast recovery rectifier diode designed for demanding applications. It features a 50 Ampere average forward current rating and supports peak repetitive reverse voltages ranging from 50 to 400 Volts depending on the specific variant within the series. The device utilizes a DO-203AB (DO-5) axial leaded package suitable for stud or chassis mounting. It operates with a junction temperature range of -65°C to 150°C and exhibits a maximum reverse recovery time of 200 nanoseconds, ensuring efficient performance in high-speed switching environments.

Single Diodes Feature Summary

• High reliability construction qualified per MIL-PRF-19500/308 standards
• Fast recovery characteristics with a maximum reverse recovery time of 200 ns
• Robust thermal management capability supporting a junction temperature up to 150°C
• High current handling capacity rated at 50 Amperes average forward current

Single Diodes Applications

• Military and aerospace power supply circuits requiring high reliability
• Industrial equipment utilizing stud-mounted rectification
• High-voltage DC power conversion systems
• Chassis or panel mount rectifier applications

Single Diodes Procurement Notes

Verify the specific voltage sub-rating required, as the 1N3909 designation covers a voltage range up to 400V. Confirm that the DO-203AB package style matches the mechanical constraints of the target assembly. Ensure compliance with military qualification requirements if the application demands adherence to MIL-PRF-19500/308 standards. Check for RoHS status as this component may not be compliant.

Single Diodes Selection Notes

Select the 1N3909 when a high-current, fast-recovery rectifier is needed for stud-mount installations. This component is appropriate for designs requiring robustness against harsh environmental conditions and high thermal loads. Consider the specific reverse voltage requirement within the 50V to 400V range to ensure adequate safety margins. Evaluate the physical mounting space available for the DO-203AB package before finalizing the design.

Single Diodes Part Context

The 1N3909 belongs to a family of high-reliability fast recovery rectifiers manufactured by Microchip Technology. This series includes variants such as the 1N3910, 1N3911, 1N3912, and 1N3913, which differ primarily in their peak repetitive reverse voltage ratings. These devices are engineered for critical applications where standard commercial components would fail due to electrical stress or environmental factors.

Single Diodes Replacement Considerations

Direct substitutes include other parts within the same Microchip series, specifically the 1N3910, 1N3911, 1N3912, and 1N3913, provided the voltage rating meets the circuit requirements. Cross-brand replacements must match the 50A current rating, 200ns reverse recovery time, and DO-203AB package dimensions.