KBU4M-M3/A

Overview

The KBU4M-M3/A is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features an average forward rectified current (Io) of 4 A and a maximum repetitive peak reverse voltage (Vrrm) of 1000 V. The device exhibits a maximum forward voltage drop (Vf) of 1.1 V at 4 A and a non-repetitive peak forward surge current (Ifsm) of 150 A. Operating within a junction temperature range of -50°C to +150°C, it utilizes a glass-passivated silicon chip for enhanced stability. The component is housed in a KBU plastic package designed for through-hole mounting.

Feature Summary

• Glass-passivated silicon chips provide mechanical stress resistance and stable electrical performance across operating conditions.
• High surge current capability supports robust operation during transient load events.
• Plastic case construction offers flameproof molding compound compliance with UL recognition.

Applications

• General-purpose AC-to-DC power supply circuits
• Battery charging systems
• Low-voltage DC power supplies

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and marking consistency. Confirm RoHS compliance status via the manufacturer's latest documentation before integration. Ensure storage conditions align with semiconductor handling standards to prevent moisture sensitivity issues prior to soldering.

Selection Notes

Select this component when a 4 A rating and 1000 V blocking voltage are required in a compact through-hole form factor. Compare thermal dissipation requirements against the KBU package's thermal resistance characteristics. Validate that the 1.1 V forward voltage drop meets system efficiency targets compared to lower-drop alternatives.

Part Context

This part belongs to the KBU series of single-phase bridge rectifiers from Vishay. The series offers various voltage ratings and current capacities within the same standardized KBU plastic housing. This specific model provides a balance of high voltage blocking capability and moderate current handling for general industrial applications.

Replacement Considerations

Direct parameter-equivalent substitutes include the KBU4M-M3/P variant from the same manufacturer. Verify pin compatibility and thermal characteristics when considering cross-manufacturer replacements such as those from Littelfuse or ON Semiconductor in the KBU footprint.