1N6638U/TR

Overview

The Microchip Technology 1N6638U/TR is a small signal switching diode designed for surface mount applications. It features a single configuration within the D-5D-2 package. Key electrical parameters include a peak reverse voltage of 125 V, an average forward current of 200 mA, and a maximum surge current of 2.5 A. The device exhibits a fast recovery time of 4.5 ns with a maximum diode capacitance of 2.5 pF. Forward voltage is specified at 1.1 V, while reverse current reaches 500 nA. Operating temperatures range from -65°C to +175°C.

Feature Summary

• Fast switching capability with 4.5 ns recovery time suitable for high-speed digital circuits
• Wide operating temperature range extending to +175°C for demanding environments
• Low junction capacitance of 2.5 pF minimizing signal distortion in computer diode applications

Applications

• Signal or computer diode circuits
• High-speed switching applications
• Digital logic interface protection

Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm the D-5D-2 surface mount package matches the target PCB footprint. Ensure the 200 mA forward current rating satisfies the circuit requirements. Check for RoHS compliance status as indicated by manufacturer documentation. Validate the JANTX quality level if radiation hardness or military specifications are required for the project.

Selection Notes

Select this component when a surface mount switching diode with low capacitance is required. The 125 V reverse voltage rating suits low-voltage signal processing tasks. Compare against through-hole variants like 1N6638 if board space permits larger packages. Consider the 4.5 ns recovery speed for timing-critical designs. Verify thermal management needs given the wide temperature range capabilities.

Part Context

This part belongs to the 1N6638 series of switching diodes manufactured by Microchip Technology. It shares characteristics with other variants in the family such as the JANS and JAN versions. The U/TR designation specifically denotes the surface mount reel format. These diodes are commonly used in general purpose switching roles within electronic assemblies requiring reliable performance across extreme temperatures.

Replacement Considerations

Direct substitutes include the JANTX1N6638U/TR which shares identical electrical specifications and package type. The JANS1N6638US/TR offers similar performance with potential differences in qualification standards. Verify pinout compatibility and thermal resistance values before substituting any alternative part numbers.