UD3KB40-BP

Bridge Rectifier Overview

The MCC UD3KB40-BP is a single-phase glass passivated bridge rectifier rated for a peak repetitive reverse voltage of 400 V and an average forward current of 3 A. It utilizes a D3K-4 through-hole package with solder pin termination. The device features a maximum non-repetitive peak surge current of 180 A at 1 ms square wave or 170 A at 8.3 ms half sine wave. Electrical characteristics include a typical forward voltage of 1.0 V at 1.5 A, a maximum reverse current of 100 μA at 125°C, and a junction capacitance of 25 pF. Thermal resistance from junction to case is 1.5 °C/W.

Bridge Rectifier Feature Summary

• Glass passivated chip junction construction
• High surge forward current capability
• Epoxy meets UL 94 V-0 flammability rating
• Halogen-free green device compliant with RoHS

Bridge Rectifier Applications

• General purpose AC to DC power supply conversion
• Battery charging circuits
• Industrial control systems

Bridge Rectifier Procurement Notes

Verify authenticity by purchasing directly from Micro Commercial Components or authorized distributors listed on the official website. Counterfeit parts are prevalent; unauthorized sources lack traceability and warranty coverage. Confirm the BP suffix indicates RoHS compliance and bulk packaging specifications (25 pcs/tube, 1500 pcs/box) before ordering.

Bridge Rectifier Selection Notes

Select this component for applications requiring 400 V blocking voltage and 3 A continuous current in a compact D3K-4 package. Ensure thermal management accounts for the 55 °C/W junction-to-ambient resistance without a heatsink. Verify that the 180 A surge rating exceeds expected inrush currents during startup conditions.

Bridge Rectifier Part Context

This part belongs to the UD3KB series of bridge rectifiers covering voltages from 50 V to 1000 V. The 'B' denotes bridge configuration, '40' specifies the 400 V rating, and 'BP' indicates RoHS compliance with bulk packaging. It shares the D3K-4 mechanical footprint with other variants like UD3KB05 and UD3KB100.

Bridge Rectifier Replacement Considerations

Direct substitutes within the same family include UD3KB20 (200 V) or UD3KB60 (600 V) if voltage ratings differ. Cross-manufacturer replacements must match the 3 A current, 400 V reverse voltage, D3K-4 package dimensions, and 1.0 V forward voltage characteristics.