1N6640US

Overview

The Microchip Technology 1N6640US is a small signal switching diode housed in a hermetically sealed D-5D glass package. It features a peak reverse voltage of 75 V and a working peak reverse voltage of 50 V. The device supports an operating current of 300 mA with a maximum surge current of 2.5 A. Electrical characteristics include a forward voltage ranging from 0.76 V to 1.00 V at specified currents, a reverse current of 100 nA at +25°C, and a typical recovery time of 4.0 ns. It operates within a temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed non-cavity glass package designed for high reliability applications
• Metallurgically bonded construction ensuring robust physical integrity
• Fast switching capability with low reverse recovery time suitable for computer circuits

Applications

• Signal or computer diode circuits
• High-reliability aerospace and defense systems
• General purpose switching applications requiring hermetic sealing

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm exact qualification levels such as JAN, JANTX, or JANTXV per MIL-PRF-19500/609. Ensure the procurement specification matches the required hermetic seal standards and metallurgical bonding requirements defined in the datasheet. Confirm lead finish specifications if tin/lead compatibility is necessary for the assembly process.

Selection Notes

Select this component when a hermetically sealed glass package is mandatory for environmental protection. The 1N6640US is appropriate for designs requiring a 75 V peak reverse voltage rating and fast switching speeds around 4 ns. Consider the thermal resistance of 50 °C/W and the axial coefficient of expansion (+4 PPM/°C) when designing the mounting surface system to ensure mechanical stability across the wide operating temperature range.

Part Context

This part belongs to the 1N6639US through 1N6641US series of switching diodes manufactured by Microchip Technology. These devices share similar package dimensions and electrical architectures but differ in breakdown voltage ratings. The 1N6640US specifically provides a 75 V peak reverse voltage, positioning it between the 100 V rated 1N6639US and other variants in the family.

Replacement Considerations

Direct drop-in replacements must match the D-5D case style and hermetic glass construction. Verify that substitute parts meet the same MIL-PRF-19500/609 qualification standards and possess equivalent thermal resistance and axial coefficient of expansion values to maintain mounting surface compatibility.