KBU6K-E4/51

Overview

The KBU6K-E4/51 is a single-phase bridge rectifier from Vishay's KBU6 series, designed for general-purpose applications. It features a peak repetitive reverse voltage (Vrrm) of 700 V and an average forward rectified current (Io) of 6 A. The device supports a peak non-repetitive forward surge current (Ifsm) of 250 A and exhibits a maximum forward voltage drop (Vf) of 1.1 V at rated current. Reverse leakage current (Ir) is limited to 5 µA. Operating within a junction temperature range of -50 °C to +150 °C, it utilizes a KBU package with four pins for through-hole mounting.

Feature Summary

• Robust thermal management capability supporting high-temperature operation up to 150 °C
• High surge current handling capacity suitable for transient protection in power circuits
• Low forward voltage drop design for improved energy efficiency
• Standardized KBU through-hole footprint for reliable PCB integration

Applications

• General-purpose AC-to-DC power supply conversion
• Battery charging circuitry
• Industrial control systems requiring isolated DC rails

Procurement Notes

Verify the specific suffix E4/51 against official Vishay documentation to confirm RoHS compliance and lead-free status. Ensure the ordering part number matches the required voltage rating of 700 V. Cross-reference datasheet revisions to confirm pinout consistency. Validate that the KBU package dimensions align with the target PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a 700 V blocking voltage and 6 A continuous current are required in a compact through-hole form factor. Compare Vf characteristics against alternative bridge rectifiers to ensure thermal performance meets system requirements. Verify that the 250 A surge rating exceeds the expected inrush currents of the load. Confirm compatibility with operating temperatures up to 150 °C for harsh environments.

Part Context

This component belongs to the Vishay KBU6 series of single-phase bridge rectifiers. The series offers various voltage ratings while maintaining consistent mechanical dimensions and electrical characteristics such as surge current handling. The KBU6K variant specifically provides 700 V blocking capability, distinguishing it from lower or higher voltage counterparts within the same physical package family.

Replacement Considerations

Direct replacements must match the 700 V Vrrm, 6 A Io, and KBU package type. Verify equivalent Ifsm ratings and Vf specifications to maintain thermal performance. Check for identical pinout configurations to ensure board compatibility without redesign.