1N4448WS-HE3-18

Overview

The 1N4448WS-HE3-18 is a small signal fast switching diode manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum DC reverse voltage (Vr) of 75 V and an average rectified forward current (Io) of 150 mA. The device exhibits a typical forward voltage (Vf) of 720 mV at 5 mA and a reverse leakage current of 5 µA at 75 V. Key electrical characteristics include a reverse recovery time (trr) of 4 ns and a junction capacitance of 4 pF at 0 V, 1 MHz. It operates within a junction temperature range of -55°C to 150°C and is housed in the SOD-323 surface-mount package.

Feature Summary

• Fast switching capability with a reverse recovery time of 4 ns for high-speed signal processing
• Automotive grade qualification compliant with AEC-Q101 standards
• Compact SOD-323 surface-mount package design for space-constrained applications

Applications

• High-speed signal switching circuits
• Automotive electronic systems requiring AEC-Q101 compliance
• General purpose rectification in compact PCB layouts

Procurement Notes

This component is officially obsolete and no longer manufactured by Vishay General Semiconductor - Diodes Division. Procurement must rely on verified direct substitutes or remaining stock from authorized distributors. Verify that replacement parts maintain identical electrical specifications, package dimensions, and automotive qualification status to ensure circuit compatibility and reliability.

Selection Notes

Select this component for applications requiring fast switching speeds and automotive reliability in a small surface-mount footprint. Ensure the design accommodates the 150 mA current limit and 75 V reverse voltage rating. Due to its obsolete status, engineers should prioritize alternative components with matching trr, Vf, and AEC-Q101 certification during new designs.

Part Context

The 1N4448WS-HE3-18 belongs to the 1N4448 series of small signal switching diodes. It shares core electrical performance with through-hole variants but utilizes the SOD-323 package for surface-mount technology. This series is designed for general-purpose switching and rectification tasks where speed and size are critical factors in system architecture.

Replacement Considerations

Direct substitute part numbers include 1N4448TAP and 1N4448WS-E3-08 from Vishay. Verify that replacements match the 75 V Vr, 150 mA Io, and SOD-323 package constraints.