KBU4M-M3/P

Overview

The KBU4M-M3/P is a single-phase 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 1000 V. The component utilizes glass passivation for junction protection and is housed in a KBU-4 through-hole package with solder pin termination. Key electrical characteristics include a maximum non-repetitive peak forward surge current of 150 A, a typical forward voltage drop of 1 V at rated current, and a maximum reverse leakage current of 5 µA at the rated voltage. The device supports a wide operating junction temperature range from -55°C to +150°C.

Feature Summary

• Glass passivated junctions provide mechanical stress resistance and improved long-term stability under thermal cycling conditions.
• High surge current capability allows reliable operation during transient overload events common in AC-to-DC conversion applications.
• Through-hole mounting design facilitates integration into standard printed circuit board layouts requiring robust mechanical anchoring.

Applications

• General purpose AC-to-DC full-wave rectification in switching power supplies
• Power supply units for home appliances and consumer electronics
• Adapters and chargers requiring isolated DC output stages

Procurement Notes

Verify the specific suffix P indicates tube packaging when reviewing distributor listings, as this affects handling procedures. Confirm RoHS compliance status via the official datasheet before finalizing procurement specifications. Ensure the ordering part number matches the exact voltage and current ratings required for the target circuit design to avoid compatibility issues.

Selection Notes

Select this component when a 1000 V blocking voltage is necessary for high-voltage AC inputs. The 4 A current rating suits moderate power applications where space constraints favor the KBU form factor over larger industrial packages. Verify that the PCB layout accommodates the specific lead spacing and physical dimensions defined in the mechanical drawings.

Part Context

This part belongs to the KBU series of glass-passivated single-phase bridge rectifiers. The M3 designation typically signifies lead-free construction compliant with EU directives. The KBU-4 package offers a compact footprint relative to its current handling capacity, making it suitable for dense electronic assemblies compared to older axial or larger block-style rectifier designs.

Replacement Considerations

Direct replacements must match the 4 A current rating and 1000 V reverse voltage specification. Verify that alternative manufacturers offer identical KBU-4 package dimensions and pinout configurations to ensure mechanical interchangeability without PCB redesign.

FAQ

What is the maximum non-repetitive peak forward surge current?

The maximum non-repetitive peak forward surge current is 150 A.

Does this component use glass passivation?

Yes, the KBU4M-M3/P features glass passivated junctions for enhanced durability.

What is the maximum reverse leakage current?

The maximum reverse leakage current is 5 µA at the rated repetitive peak reverse voltage.