1N4449/TR

Single Diodes Overview

The Microchip Technology 1N4449/TR is a small-signal switching diode designed for high-speed applications. It features a peak reverse voltage of 75 V and an average forward current rating of 30 mA. The device exhibits a maximum reverse recovery time of 4 ns and a junction capacitance of 2 pF at 0 V. Operating temperatures range from -65 °C to +150 °C. It utilizes a DO-35-2 through-hole package with metallurgically bonded construction.

Single Diodes Feature Summary

• Hermetically sealed glass construction with internal metallurgical bonding
• Very low capacitance for minimal signal distortion
• Fast switching speeds with minimal reverse recovery times
• Double-plug DO-35 package design

Single Diodes Applications

• High frequency data lines
• RS-232 & RS-422 interface networks
• Ethernet 10 Base T
• Switching core drivers
• Computers and peripheral equipment

Single Diodes Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging per EIA-296 standards. Confirm RoHS compliance status, as non-compliant versions exist within this series. Ensure the ordering quantity aligns with factory reel specifications. Cross-reference the part number against the latest Microchip datasheet to confirm availability of screening options such as MIL-PRF-19500 if required for the application.

Single Diodes Selection Notes

Select this component for circuits requiring fast switching and low capacitance in a through-hole format. The 75 V reverse voltage rating suits general-purpose signal processing. Verify that the 30 mA forward current meets load requirements. Consider the operating temperature range limits for environmental suitability. Compare junction capacitance values against other series members like 1N4149-1 if lower capacitance is critical.

Single Diodes Part Context

This part belongs to the JEDEC registered 1N4149, 1N4151, 1N4154, and 1N4446–1N4449 series of switching diodes. These devices are characterized by hermetically sealed glass packages and metallurgical bonding. The series supports various reliability levels and screening options, including military specifications, while maintaining standard commercial grades for general use.

Single Diodes Replacement Considerations

1N4149-1

Single Diodes FAQ

What is the junction capacitance of the 1N4449-1?

The junction capacitance is 2 pF at 0 V.

Does the 1N4449-1 feature metallurgical bonding?

Yes, it has internal metallurgical bonded construction.