1N3644

Single Diodes Overview

The Microchip Technology 1N3644 is a high voltage standard recovery rectifier diode qualified to MIL-PRF-19500/279 for JAN and JANTX levels. It features a voidless hermetically sealed glass package with tungsten slugs. The device has a working peak reverse voltage of 1500 V, a minimum breakdown voltage of 1800 V, and a maximum forward voltage of 5.0 V at 250 mA. Steady-state power dissipation is 1.5 W at 25°C, with an average rectified forward current of 0.25 A at 55°C and 0.10 A at 100°C.

Single Diodes Feature Summary

• Voidless hermetically sealed glass construction with triple-layer passivation for absolute high voltage stability.
• Military qualification per MIL-PRF-19500/279 available in JAN and JANTX reliability levels.
• Inherently radiation hard design suitable for environments where failure cannot be tolerated.

Single Diodes Applications

• High voltage standard recovery rectification circuits
• Military and other high-reliability applications
• Bridges, half-bridges, catch diodes, and voltage multipliers
• X-ray machines, power supplies, transmitters, and radar equipment

Single Diodes Procurement Notes

Verify the specific ordering suffix to confirm the required reliability level (JAN or JANTX) and RoHS compliance status. Commercial grade versions are available without military qualification. Confirm lead finish options, as tin/lead or matte/tin finishes may apply depending on the grade. Ensure the procurement documentation references the correct MIL-PRF-19500/279 qualification for the intended application environment.

Single Diodes Selection Notes

Select the 1N3644 when a 1500 V working peak reverse voltage is required in high-reliability systems. Consider this component for designs demanding low reverse leakage and inherent radiation hardness. Evaluate thermal constraints carefully, as the average forward current decreases significantly at higher ambient temperatures compared to commercial alternatives.

Single Diodes Part Context

This component belongs to the 1N3643 through 1N3647 series of high voltage rectifiers manufactured by Microsemi Corporation, now part of Microchip Technology. These devices are JEDEC registered and designed for robust performance in extreme conditions. The series utilizes voidless hard glass packages with tungsten slugs to ensure thermal stability and hermetic sealing.

Single Diodes Replacement Considerations

Direct replacements include the 1N4254, which shares similar electrical characteristics but lacks the specific JAN/JANTX military qualification. Other series members like the 1N3643 or 1N3645 offer different voltage ratings within the same package style.