KBU6B-E4/51

Overview

The KBU6B-E4/51 is a single-phase bridge rectifier from Vishay Semiconductors, utilizing silicon P-n junction technology. It features an average forward rectified current of 6 A and a maximum repetitive peak reverse voltage of 100 V. The device is housed in a plastic KBU case with four pins for through-hole mounting. Key electrical characteristics include a non-repetitive peak forward surge current of 250 A, a maximum DC blocking reverse current of 5 μA, and a maximum forward voltage drop of 1 V. It operates within a temperature range of -50°C to +150°C.

Feature Summary

• Isolated case construction for direct heat sinking without additional insulators
• High surge current capability for robust transient protection
• Compliant with RoHS standards and free of halogenated substances

Applications

• AC-DC power supply circuits
• Battery charging systems
• General-purpose rectification in low-voltage electronics

Procurement Notes

Verify the specific suffix against the manufacturer's latest datasheet to confirm pinout orientation and marking conventions. Ensure the component meets the required environmental compliance standards for the target assembly process. Cross-reference the package dimensions with PCB footprint libraries to guarantee mechanical fit during integration.

Selection Notes

Select this component when a 100 V rating is sufficient for the application, as higher voltage variants like KBU6D or KBU6G offer increased reverse voltage capabilities. Consider the KBU package size relative to available board space compared to smaller surface-mount alternatives. Evaluate thermal management requirements based on the 6 A continuous current rating and ambient operating conditions.

Part Context

This part belongs to the Vishay KBU6 series of single-phase bridge rectifiers, which provides various voltage ratings ranging from 50 V to 1000 V. The series shares a common KBU plastic package and 6 A current rating, allowing for design flexibility while maintaining consistent mechanical and thermal characteristics across different voltage requirements.

Replacement Considerations

Direct substitutes within the same family include KBU6A-E4/51 (50 V) and KBU6D-E4/51 (200 V), provided the voltage rating aligns with circuit needs. Other manufacturers offering equivalent 6 A, 100 V bridge rectifiers in the KBU package may require verification of pinout compatibility and forward voltage specifications.