1N4448WS

Overview

The onsemi 1N4448WS is a small signal switching diode designed for high-speed applications. It features a peak reverse voltage of 75 V and a maximum forward current of 150 mA. The device exhibits a fast recovery time of 4 ns, ensuring minimal signal delay in high-frequency circuits. It operates within a junction temperature range of -55°C to +150°C and has a maximum surge current rating of 4 A. The component is housed in an SOD-323F-2 surface-mount package.

Feature Summary

• High conductance design optimized for efficient signal switching
• Fast switching capability with 4 ns recovery time for high-frequency performance
• Compact SMD form factor suitable for space-constrained PCB layouts

Applications

• High-speed digital signal processing circuits
• Clamping and protection in RF communication systems
• Logic level shifting and isolation in consumer electronics

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout orientation and packaging type. Ensure the selected variant matches the required RoHS compliance status and moisture sensitivity level for your assembly process. Cross-reference the part number with authorized distributors to confirm availability and authenticity before finalizing procurement.

Selection Notes

Select this component when a compact surface-mount solution is required for high-speed switching tasks. The 1N4448WS offers a balance of low capacitance and fast recovery, making it suitable for frequencies where standard rectifiers would introduce excessive delay. Consider the SOD-323F-2 footprint constraints during PCB layout to ensure proper thermal and electrical performance.

Part Context

This device belongs to the 1N4148 family of small-signal switching diodes, widely used in general-purpose electronic designs. The 'WS' suffix typically denotes a specific surface-mount package configuration offered by onsemi. It serves as a modern replacement for through-hole variants in automated manufacturing environments requiring smaller footprints.

Replacement Considerations

Direct substitutes include other 1N4148 series diodes in SOD-323 packages from different manufacturers, provided they meet the 75V reverse voltage and 4ns recovery time specifications. Verify that alternative parts maintain compatible forward voltage drop and leakage current characteristics for circuit compatibility.