2N4948

Overview

The Central Semiconductor Corp 2N4948 is a silicon rectifier diode designed for general-purpose applications. It features a maximum average forward rectified current of 1.0 A and a maximum repetitive peak reverse voltage of 1000 V. The device utilizes a DO-41 axial leaded plastic package, which provides mechanical stability and thermal dissipation capabilities. Electrical characteristics include a low reverse leakage current to ensure efficient blocking performance in the off-state. The component supports high temperature soldering procedures and is rated for operation across a wide temperature range, ensuring reliability in various circuit environments.

Feature Summary

• High voltage blocking capability with 1000 V reverse voltage rating
• Robust 1.0 A continuous forward current handling
• DO-41 molded plastic package with UL flammability classification 94V-0
• Low reverse leakage current for improved efficiency

Applications

• General purpose rectification in power supplies
• Free wheeling diode circuits
• High voltage switching applications

Procurement Notes

Verify the manufacturer designation carefully, as the 2N4948 part number is historically associated with multiple semiconductor vendors including Central Semiconductor, Microchip, and others. Confirm the specific datasheet matches the required electrical tolerances and package dimensions. Ensure the supplier provides traceable documentation regarding RoHS compliance status and manufacturing origin to meet project specifications.

Selection Notes

Select this component when a standard 1A, 1000V rectifier is required in an axial DO-41 package. Consider the thermal derating curves provided in the official datasheet for ambient temperatures exceeding 75°C. Evaluate the reverse recovery time if used in high-frequency switching applications, although it is primarily optimized for general-purpose rectification rather than ultra-fast switching scenarios.

Part Context

The 2N4948 belongs to the family of standard silicon rectifier diodes commonly used in industrial and consumer electronics. It shares functional similarities with other 1A/1000V devices but may differ in specific parameters like reverse recovery time or leakage current depending on the manufacturer. Central Semiconductor's version emphasizes reliability and compliance with industry standards for through-hole mounting.

Replacement Considerations

Cross-reference with 1N4948 variants from other manufacturers only after verifying identical pinout, voltage ratings, and current capabilities. Ensure substitute components meet the same thermal and mechanical requirements.