UD4KB40-BP

Bridge Rectifier Overview

The UD4KB40-BP is a single-phase bridge rectifier manufactured by Micro Commercial Components (MCC). It features glass passivated chip junctions and epoxy meeting UL 94 V-0 flammability ratings. The device supports an average rectified forward current of 4 A at a case temperature of 140°C, with a peak repetitive reverse voltage of 400 V. Electrical characteristics include a maximum reverse current of 5 µA at 25°C and 100 µA at 125°C. Thermal resistance from junction to case is 1.5 °C/W, while junction to ambient is 55 °C/W without a heatsink. The component operates within a temperature range of -55°C to 150°C.

Bridge Rectifier Feature Summary

• Glass passivated chip junction for enhanced reliability
• High surge forward current capability
• Halogen-free green device construction

Bridge Rectifier Applications

• General purpose AC to DC power supply conversion
• Industrial control systems requiring robust rectification
• Automotive electronics applications

Bridge Rectifier Procurement Notes

Verify authenticity through authorized MCC distributors or direct purchase to avoid counterfeit components. Confirm RoHS compliance via the BP suffix designation. Ensure storage conditions align with manufacturer guidelines to maintain product integrity prior to assembly.

Bridge Rectifier Selection Notes

Select this component for circuits requiring 4 A continuous current and 400 V reverse blocking voltage. Evaluate thermal management requirements based on the specified junction-to-case resistance. Verify package dimensions against PCB layout constraints before finalizing design integration.

Bridge Rectifier Part Context

This part belongs to the UD4KB series of bridge rectifiers, which covers voltage ratings from 50 V to 1000 V. The series utilizes a D3K package style suitable for through-hole mounting. It shares common mechanical and electrical characteristics with other variants in the family, differing primarily in peak repetitive reverse voltage specifications.

Bridge Rectifier Replacement Considerations

Compatible substitutes include the KBP406G-BP and KBJ408GL-BP, provided they meet the required 4 A current rating and 400 V reverse voltage specifications. Verify pinout compatibility and thermal performance parameters before implementation.