KBU8G

Overview

The KBU8G is a single-phase bridge rectifier manufactured by onsemi, designed for general-purpose power supply applications. It features an average forward rectified current of 8 A and a maximum repetitive peak reverse voltage of 800 V. The device utilizes a plastic molded package with a UL recognized flammability rating of 94V-0. Electrical characteristics include a maximum RMS diode current of 12.56 A and a non-repetitive peak forward surge current capability of 300 A at 60 Hz for one half-cycle. The component operates within a junction temperature range of -55 °C to +175 °C.

Feature Summary

• High thermal stability enabling operation up to 175 °C junction temperature
• Plastic molded construction with UL 94V-0 flame retardancy rating
• Low forward voltage drop for improved efficiency in power conversion

Applications

• General purpose full-wave bridge rectification in AC-DC power supplies
• Battery charging circuits requiring high surge current handling
• Industrial control systems utilizing standard bridge rectifier configurations

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm compliance with RoHS directives and halogen-free status. Ensure the package marking matches the KBU8G designation to distinguish it from similar current-rated bridge rectifiers. Confirm that the supplier provides traceable documentation for automotive or industrial qualification if required by the end application.

Selection Notes

Select this component when an 8 A continuous current rating and 800 V blocking voltage are required in a through-hole bridge configuration. Evaluate the thermal resistance parameters relative to the heatsinking strategy, as the device supports high junction temperatures. Compare the forward voltage characteristics against alternative brands to ensure compatibility with the target power supply efficiency targets.

Part Context

This component belongs to the family of single-phase silicon bridge rectifiers produced by onsemi. It serves as a discrete solution for converting alternating current to direct current in medium-power electronic circuits. The KBU8G is part of a broader series offering various voltage and current ratings, standardized for use in conventional printed circuit board layouts for power adapters and motor drives.

Replacement Considerations

Substitutes must match the 8 A current rating, 800 V reverse voltage, and KBU package footprint. Verify equivalent forward voltage and reverse leakage specifications to maintain circuit performance.