KBU4K

Overview

The KBU4K is a single-phase bridge rectifier manufactured by onsemi. It features a maximum average forward rectified current of 4 A and a repetitive peak reverse voltage of 400 V. The device utilizes a plastic molded package with a flange mount configuration for thermal management. Key electrical parameters include a maximum RMS bridge current of 6 A, a peak forward surge current capability of 120 A at 60 Hz, and a maximum DC blocking voltage of 400 V. The component operates within a junction temperature range of -55 °C to +175 °C and maintains a low forward voltage drop typical of silicon rectifiers.

Feature Summary

• High thermal stability enabled by robust flange mount construction
• Capable of handling high surge currents during transient events
• Designed for reliable operation across extended temperature ranges

Applications

• General purpose AC to DC power supply conversion
• Battery charging circuits requiring moderate current ratings
• Industrial control systems utilizing standard bridge rectification

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current nomenclature database, as legacy part numbers may have undergone naming convention updates. Confirm compliance with RoHS directives and lead-free status through official datasheets or certified distributor documentation before finalizing procurement specifications.

Selection Notes

Select this component when a 4 A continuous current rating and 400 V reverse voltage are required in a compact flange-mount form factor. Ensure the application's thermal design can accommodate the heat dissipation characteristics of the plastic molded package. Verify that the surge current requirements do not exceed the specified 120 A limit under standard test conditions.

Part Context

This component belongs to the general-purpose bridge rectifier family offered by onsemi. It serves as a fundamental building block for converting alternating current to direct current in various electronic assemblies. The product line emphasizes reliability and thermal performance for industrial and commercial applications.

Replacement Considerations

Consult the manufacturer's cross-reference guide for verified substitute part numbers. Ensure any replacement matches the 4 A current rating, 400 V voltage rating, and compatible mounting style to maintain circuit integrity.