1N4149TR

Single Diodes Overview

The onsemi 1N4149TR is a small signal switching diode housed in a DO-35 axial lead package. It features a maximum repetitive reverse voltage of 100 V and an average rectified forward current rating of 500 mA. The device exhibits a fast reverse recovery time of 4 ns and a low total capacitance of 2 pF. Electrical characteristics include a maximum forward voltage of 1.0 V at 10 mA and a maximum reverse leakage current of 25 nA at 20 V. Thermal performance specifies a power dissipation of 500 mW and a junction-to-ambient thermal resistance of 300 °C/W.

Single Diodes Feature Summary

• Fast switching capability with a 4 ns reverse recovery time for high-speed signal processing
• Low parasitic capacitance to minimize signal distortion in high-frequency circuits
• Robust surge handling with a non-repetitive peak forward surge current rating of 4 A

Single Diodes Applications

• High-speed switching circuits
• Signal clamping and protection
• General-purpose rectification

Single Diodes Procurement Notes

Verify the specific ordering suffix 'TR' corresponds to the Tape & Reel packaging configuration containing 10,000 units per reel. Confirm that the component meets Pb-Free requirements as indicated in the manufacturer's ordering information. Ensure the selected variant matches the required DO-35 axial lead package dimensions for your assembly process.

Single Diodes Selection Notes

Select this component when a fast switching speed and low capacitance are critical for circuit performance. The 100 V reverse voltage rating provides adequate headroom for standard logic and signal levels. Consider the 500 mA continuous current limit and 4 A surge capability to ensure reliability under expected load conditions.

Single Diodes Part Context

This part belongs to the 1N4149 series of small signal diodes manufactured by onsemi. The 'TR' suffix specifically denotes the tape and reel packaging format, distinguishing it from bulk packaged versions. It is designed for general-purpose applications requiring reliable switching performance in a compact axial lead package.

Single Diodes Replacement Considerations

Compatible substitutes include other 1N4149 variants from different manufacturers, provided they meet the same electrical specifications and utilize the DO-35 package.