KBU4M-E4/51

Overview

The KBU4M-E4/51 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features a peak repetitive reverse voltage of 400 V and an average forward rectified current of 4 A. The device utilizes standard recovery technology with a maximum forward voltage drop of 1.1 V at 4 A. Reverse leakage current is specified at 5 µA at the rated voltage. It operates within a junction temperature range of -55°C to 150°C and is housed in a through-hole KBPM package.

Feature Summary

• Single-phase bridge rectifier configuration for AC-to-DC conversion
• Through-hole KBPM package design for robust mounting
• Standard recovery technology suitable for general-purpose applications

Applications

• General-purpose power supply circuits
• AC-to-DC rectification in industrial equipment
• Battery charging systems

Procurement Notes

Verify the specific manufacturer part number against official Vishay documentation to ensure authenticity. Confirm that the component matches the required electrical specifications, including voltage and current ratings, before integration into designs. Check for any end-of-life notices or obsolescence alerts associated with this specific suffix and package variant.

Selection Notes

Select this component when a 4 A current rating and 400 V blocking voltage are required in a through-hole format. Ensure the application environment stays within the -55°C to 150°C junction temperature limits. Compare thermal resistance characteristics against PCB layout constraints to maintain safe operating temperatures under full load conditions.

Part Context

This component belongs to the KBP series of bridge rectifiers from Vishay. The KBP series is widely recognized for its reliability in medium-power applications. The E4 suffix typically indicates compliance with specific environmental standards, such as RoHS directives, distinguishing it from older non-compliant variants within the same electrical family.

Replacement Considerations

Direct replacements must match the 4 A / 400 V specification and KBPM through-hole package. Verify pinout compatibility and thermal performance characteristics. Consult manufacturer cross-reference lists for equivalent parts from other vendors if availability is constrained.