1N4448

Overview

The onsemi 1N4448 is a small signal switching diode housed in a DO-204AH (DO-35) axial lead package. It features a maximum repetitive reverse voltage of 100 V and an average rectified forward current of 200 mA. The device exhibits a typical reverse recovery time of 4.0 ns, with a maximum power dissipation of 500 mW. Electrical characteristics include a forward voltage of up to 1.0 V at specified currents and a total capacitance of 2.0 pF at zero bias.

Feature Summary

• Fast switching capability with a 4.0 ns reverse recovery time
• Hermetically sealed glass construction for environmental resistance
• High thermal stability supporting operation up to +175°C junction temperature

Applications

• General purpose high-speed switching circuits
• Clamping and protection applications
• Signal demodulation tasks

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the packing method. Options include bulk packaging or tape and reel configurations. Ensure the selected variant matches the required mechanical handling specifications for your assembly process.

Selection Notes

Select this component when a fast switching speed is required alongside moderate current handling capabilities. The DO-35 through-hole package facilitates manual insertion and standard PCB mounting. Confirm that the 100 V reverse voltage rating meets the peak circuit requirements.

Part Context

This part belongs to the 1N91x and 1N4x48 series from onsemi. It shares the same physical package and core electrical performance profile as other members like the 1N4148. The primary distinction lies in the specific reverse voltage breakdown ratings defined within the family datasheet.

Replacement Considerations

The 1N4148 is a documented member of the same product family sharing identical package dimensions and similar electrical parameters.