1N4448W-HE3-18

Overview

The 1N4448W-HE3-18 is a small signal 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 reverse recovery time (trr) of 4 ns and a forward voltage (Vf) of 720 mV at 5 mA. Reverse leakage current is specified as 5 µA at 75 V. It operates within a junction temperature range of -55°C to 150°C and utilizes the SOD-123 surface mount package.

Feature Summary

• High-speed switching capability with a 4 ns reverse recovery time for efficient signal processing.
• Automotive-grade reliability certified under AEC-Q101 standards for harsh environment operation.
• Compact SOD-123 surface-mount package design optimized for space-constrained printed circuit board layouts.

Applications

• Automotive electronic circuits requiring AEC-Q101 qualified components
• General-purpose high-speed signal switching applications
• Clamping and protection circuits in consumer electronics

Procurement Notes

Verify component authenticity through authorized distribution channels due to end-of-life status. Confirm specific ordering suffixes match required packaging formats such as tape and reel or cut tape. Ensure compliance with RoHS3 directives and check for any product change notices affecting mechanical or electrical specifications prior to final procurement decisions.

Selection Notes

Select this component when automotive qualification and high-speed performance are critical requirements. The SOD-123 package offers a compact footprint suitable for dense surface-mount designs. Consider the 75 V reverse voltage rating and 150 mA current capacity against circuit demands. Evaluate thermal management needs given the -55°C to 150°C operating range for reliable long-term performance.

Part Context

This part belongs to the 1N4448 series of standard switching diodes from Vishay. It represents the surface-mount variant housed in an SOD-123 package, distinct from through-hole equivalents like the DO-35. The HE3 designation indicates Halogen-free and Green compliant construction, aligning with modern environmental regulations for semiconductor manufacturing.

Replacement Considerations

Public documentation confirms the 1N4448W-HE3-18 is obsolete. Direct substitutes include the 1N4448W-AQ by Diotec Semiconductor and the 1N4448W-7-F by Diodes Incorporated. Verify pin compatibility and electrical parameter alignment before integrating alternative sources into existing designs.