1N4948US

Overview

The 1N4948US is a fast recovery rectifier manufactured by Microchip Technology. 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-204AD (DO-41) axial leaded package with a molded plastic body. It is designed for high-efficiency applications requiring fast switching characteristics and low reverse leakage. The component supports high temperature soldering and offers high forward surge current capability.

Feature Summary

• Fast recovery rectification for high efficiency
• Low reverse leakage current
• High forward surge current capability

Applications

• General purpose rectification in power supplies
• High frequency switching circuits
• Reverse polarity protection

Procurement Notes

Verify the specific suffix US against the official Microchip datasheet to confirm package type and compliance status. Ensure the ordering part number matches the required voltage and current ratings for the target application. Confirm availability through authorized distributors as supply levels may vary.

Selection Notes

Select this component when a 1000 V reverse voltage rating and 1 A continuous forward current are required. The DO-41 package is suitable for through-hole mounting. Consider thermal derating requirements at elevated ambient temperatures above 75 C. Verify compatibility with existing PCB footprints for axial leaded components.

Part Context

This part belongs to the 1N494x series of fast recovery rectifiers from Microchip Technology. The series includes variants with different reverse voltage ratings ranging from 200 V to 1000 V. The 1N4948US specifically denotes the 1000 V variant in the standard axial package configuration.

Replacement Considerations

Compatible substitutes include other 1A 1000V fast recovery diodes in DO-41 packages such as 1N4007 or 1N5395, provided reverse recovery time specifications meet circuit requirements.