KBL08-E4/51

Overview

The Vishay KBL08-E4/51 is a single-phase bridge rectifier from the KBL series, designed for general-purpose power supply applications. It features an average forward rectified current of 8A and a maximum repetitive peak reverse voltage of 800V. The device utilizes a plastic KBL package with four pins and flange mount installation. Key electrical characteristics include a peak non-repetitive forward surge current of 200A and a maximum DC blocking current of 5µA at rated voltage. Operating temperatures range from -55°C to +150°C junction temperature.

Feature Summary

• High voltage capability up to 800V for robust reverse blocking
• Compact KBL plastic package suitable for surface or flange mounting
• Low leakage current ensures efficient operation under high bias

Applications

• AC-DC converter circuits
• Power supply units
• Battery chargers

Procurement Notes

Verify the specific suffix /51 indicates tape and reel packaging when ordering. Confirm RoHS compliance status via the manufacturer datasheet as E4 denotes lead-free termination. Ensure thermal management design accounts for the 150°C maximum junction temperature rating during continuous operation.

Selection Notes

Select this component when 8A continuous current and 800V reverse voltage are required in a compact form factor. Compare against GBL series for similar performance in slightly different package dimensions. Verify that the 200A surge current rating meets the inrush requirements of the target circuit application.

Part Context

This part belongs to Vishay's KBL series of bridge rectifiers, which offers various voltage ratings from 50V to 1000V while maintaining the same 8A current capacity. The KBL package provides a cost-effective solution for medium-power applications compared to larger through-hole packages like KBPC.

Replacement Considerations

Direct replacements include KBL06-E4/51 (600V) if voltage headroom allows, or KBL10-E4/51 (10A) for higher current needs. Cross-reference with other manufacturers' KBL-style 8A 800V bridges ensuring identical pinout and thermal pad configuration.