KBU4B-M3/A

Overview

The KBU4B-M3/A is a single-phase standard bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features an average forward rectified current of 4 A and a maximum repetitive peak reverse voltage of 400 V. The device utilizes the KBU plastic package with through-hole mounting. Key electrical parameters include a forward voltage of 1.1 V at 4 A and a reverse leakage current of 5 µA at 400 V. It operates within a junction temperature range of -55°C to 150°C.

Feature Summary

• Glass passivated junction construction for high reliability
• Plastic encapsulation utilizing the KBU case style
• Compliant with RoHS directive and halogen-free standards

Applications

• General purpose AC to DC power supply conversion
• Battery charging circuits
• DC power adapters

Procurement Notes

Verify the specific suffix against official datasheets, as packaging variations exist. Confirm component authenticity via manufacturer channels or authorized distributors. Ensure the ordering part number matches the required voltage and current ratings for the target application design.

Selection Notes

Select this component when a 4 A current rating and 400 V blocking voltage are required in a compact through-hole form factor. Compare thermal performance and forward voltage drop against alternative bridge rectifiers in similar packages to ensure compatibility with the system's efficiency and heat dissipation requirements.

Part Context

This component belongs to the KBU series of bridge rectifiers from Vishay. The series offers various voltage ratings and current capacities within the same standardized plastic housing. The M3 suffix indicates compliance with modern environmental directives, distinguishing it from older non-compliant variants in the same product family.

Replacement Considerations

Direct parameter-equivalent substitutes may include other 4 A, 400 V bridge rectifiers in the KBU package. Verify pinout compatibility and thermal characteristics before substitution. Cross-reference with Vishay's official replacement guides for confirmed compatible part numbers.