KBU4D-E4/51

Overview

The KBU4D-E4/51 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features a peak repetitive reverse voltage (Vrrm) of 200 V and an average forward rectified current (If) of 4 A per leg. The device supports a peak non-repetitive forward surge current (Ifsm) of 200 A at 60 Hz. Electrical characteristics include a maximum peak forward voltage (Vf) of 1 V and a peak reverse leakage current (Ir) of 5 μA. It operates within a junction temperature range of -50°C to +150°C. The component utilizes a KBU package with four pins for through-hole mounting, measuring 23.7 mm in length and 19.3 mm in height.

Feature Summary

• Single-phase full-wave rectification configuration
• Through-hole mounting via four-pin KBU package
• High thermal stability up to 150°C junction temperature

Applications

• General-purpose AC to DC power supply conversion
• Low-voltage rectification circuits requiring 200 V blocking capability
• Industrial control systems utilizing standard bridge rectifiers

Procurement Notes

Verify the specific suffix /51 against official Vishay documentation to confirm reel or tube packaging specifications. Ensure the E4 designation aligns with required halogen-free compliance standards for the target assembly process. Cross-reference the KBU4 series datasheet for detailed mechanical drawing tolerances before finalizing procurement orders.

Selection Notes

Select this component when a 200 V reverse voltage rating and 4 A continuous current are sufficient for the application. The KBU4 series offers a compact footprint compared to higher-current variants like KUB8. Verify that the 1 V forward voltage drop meets the efficiency requirements of the low-voltage output stage.

Part Context

This part belongs to the Vishay KBU4 series of single-phase bridge rectifiers. The series provides various voltage ratings from 50 V to 1000 V while maintaining a consistent 4 A current rating and KBU package form factor. The KBU4D variant specifically addresses applications requiring a 200 V blocking voltage threshold.

Replacement Considerations

Compatible substitutes within the same family include KBU4B-E4/51 (100 V), KBU4G-E4/51 (400 V), and KBU4K-E4/51 (800 V). These parts share identical electrical current ratings, package dimensions, and pin configurations, allowing for direct physical replacement if voltage ratings are adjusted accordingly.