1N4149

Single Diodes Overview

The onsemi 1N4149 is a small signal diode housed in an axial lead DO-35 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 peak non-repetitive forward surge current of 1.0 A for a pulse width of 1.0 s, or 4.0 A for a pulse width of 1.0 /C0109s. Electrical characteristics include a maximum forward voltage of 1.0 V at 10 mA, a maximum reverse leakage current of 25 nA at 20 V, and a total capacitance of 2 pF at 1.0 MHz. The reverse recovery time is specified as 4 ns under defined test conditions.

Single Diodes Feature Summary

• Fast switching capability with a 4 ns reverse recovery time
• Hermetically sealed glass construction for environmental stability
• High thermal resistance junction-to-ambient rating

Single Diodes Applications

• General-purpose switching applications
• Clamping circuits
• Protection circuits

Single Diodes Procurement Notes

Verify the specific ordering suffix to confirm packaging format, such as bulk units versus tape and reel quantities. Ensure the selected variant meets the required Pb-Free status if mandated by project specifications. Cross-reference the document number 98AON13443G to access the most current mechanical dimensions and electrical limits before finalizing procurement.

Single Diodes Selection Notes

Select this component when a fast-switching diode with a 100 V reverse voltage rating is required. The DO-35 axial lead package facilitates through-hole mounting. Evaluate the 500 mA average forward current limit against circuit load requirements. Confirm that the 4 ns reverse recovery time satisfies the speed constraints of the target application environment.

Single Diodes Part Context

This part belongs to the standard small-signal diode family manufactured by onsemi. It utilizes silicon epitaxial planar technology within a glass encapsulation. The product line provides reliable performance for low-power electronic designs requiring rapid transition between conducting and blocking states.

Single Diodes Replacement Considerations

Consult official cross-reference documentation for verified equivalent part numbers from other manufacturers. Do not substitute based solely on generic parameter matching without verifying package compatibility and absolute maximum ratings.