KBU8D-E4/51

Overview

The Vishay KBU8D-E4/51 is a single-phase bridge rectifier from the KUB8 series, housed in a KBU through-hole package. It features a peak repetitive reverse voltage (Vrrm) of 200 V and an average forward rectified current (If) of 8 A. The device supports a peak non-repetitive forward surge current (Ifsm) of 300 A. Electrical characteristics include a maximum peak forward voltage (Vf) of 1 V and a peak reverse current (Ir) of 10 μA. The component operates within a temperature range of -50°C to +150°C and has physical dimensions of 23.7 mm in length and 19.3 mm in height.

Feature Summary

• Four-terminal single-phase bridge configuration for AC-to-DC conversion
• Through-hole mounting design compatible with standard PCB layouts
• High thermal stability supporting operation up to 150°C junction temperature

Applications

• General-purpose power supply circuits requiring low-voltage rectification
• Battery charging systems operating within 200 V reverse voltage limits
• Industrial control equipment power stages

Procurement Notes

Verify the complete part number including suffixes such as /51 against official Vishay documentation to ensure correct packaging and compliance specifications. Confirm that the KBU package style matches the target board footprint requirements. Cross-reference electrical ratings with system demands to prevent overstress conditions during operation or transient events.

Selection Notes

Select this component when an 8 A continuous current rating and 200 V blocking capability are required in a compact through-hole form factor. Compare the 300 A surge rating against expected inrush currents in the specific application. Ensure the 1 V forward voltage drop aligns with thermal management constraints compared to alternative packages like GBPC or KBPC.

Part Context

This device belongs to the Vishay KUB8 series, which utilizes the KBU plastic package. The series offers various voltage ratings while maintaining consistent mechanical dimensions and pin configurations. The KBU8D variant specifically targets applications needing moderate current handling with robust surge protection capabilities in a standard industrial enclosure.

Replacement Considerations

Compatible substitutes within the same family include KBU8B-E4/51 (100 V), KBU8G-E4/51 (400 V), and KBU8M-E4/51 (1000 V). These parts share identical mechanical footprints and current ratings but differ in reverse voltage blocking capabilities. Verify voltage derating requirements before substituting.