1N3649R

Single Diodes Overview

The Microchip Technology 1N3649R is a high-reliability power rectifier qualified per MIL-PRF-19500/260. It features glass passivated die and glass-to-metal seal construction in a DO-203AA (DO-4) stud mount package. The device supports a peak repetitive reverse voltage of 800 V, an average forward current of 3.3 A at 150°C case temperature, and a peak surge forward current of 25 A. It operates within a case temperature range of -65°C to 150°C.

Single Diodes Feature Summary

• Glass passivated die with glass-to-metal seal construction for enhanced durability
• Qualified per MIL-PRF-19500/260 for high reliability applications
• Stud mount configuration suitable for high-power thermal management

Single Diodes Applications

• High reliability power rectification circuits
• Military and aerospace electronic systems
• Industrial power supplies requiring rugged components

Single Diodes Procurement Notes

Verify the specific revision level and lot traceability against MIL-PRF-19500/260 requirements before procurement. Confirm that the ordering suffix 'R' correctly denotes the reversed polarity configuration as specified in the datasheet notes. Ensure compatibility with the required mounting hardware torque specifications.

Single Diodes Selection Notes

Select this component when a stud-mount rectifier with 800 V blocking capability is required. The 3.3 A average forward current rating must be evaluated against the actual thermal resistance and case temperature conditions. Consider the 25 A surge rating for transient load protection needs.

Single Diodes Part Context

This part belongs to the 1N3649 series of high-reliability power rectifiers manufactured by Microchip Technology. It is functionally equivalent to the non-suffix 1N3649 but includes the 'R' designation indicating reversed polarity orientation where the anode is connected to the stud.

Single Diodes Replacement Considerations

Direct substitutes include the 1N3649 (non-reversed polarity) and other devices from the same MIL-PRF-19500/260 qualified family such as the 1N1124A or 1N1126A if voltage ratings align.