KBL408G

Overview

The GeneSiC Semiconductor KBL408G is a single-phase glass-passivated silicon bridge rectifier designed for general-purpose power conversion. It features a molded plastic case with silver-plated copper leads and supports an average forward rectified current of 4 A. The device provides a repetitive peak reverse voltage rating of 800 V, making it suitable for AC-to-DC applications in environments ranging from -50 °C to +150 °C junction temperature. Key electrical characteristics include a maximum instantaneous forward voltage of 1.1 V at 4 A and a peak forward surge current capability of 120 A under single sine-wave conditions.

Feature Summary

• Single-phase glass-passivated silicon construction
• Silver-plated copper leads for solderability
• Molded plastic case for reliable low-cost construction

Applications

• Printed circuit board mounting
• General-purpose AC to DC rectification
• Power supply input stages

Procurement Notes

Verify the specific datasheet version and manufacturer documentation when sourcing components. Confirm that the part number matches the exact electrical ratings required for your application, particularly the 800 V reverse voltage and 4 A current limits. Ensure compliance with environmental standards such as lead-free requirements if applicable to your manufacturing process.

Selection Notes

Select this component for applications requiring a robust 4 A bridge rectifier with an 800 V blocking voltage. Consider the thermal management capabilities within the specified -50 °C to +150 °C operating range. Derate the current by 20% if used with capacitive loads to ensure reliability and prevent excessive stress on the internal diode structure during operation.

Part Context

The KBL408G belongs to the KBL series of bridge rectifiers, which includes variants like the KBL406G and KBL410G. These parts share similar mechanical dimensions and package styles but differ in their voltage ratings. The KBL series is widely used in consumer electronics and industrial equipment where space-saving through-hole mounting is preferred over surface-mount alternatives.

Replacement Considerations

Compatible substitutes include the KBL408G from other manufacturers such as Comchip Technology or Sensitron. Ensure any replacement maintains the same 4 A current rating, 800 V reverse voltage, and KBL package footprint to guarantee mechanical and electrical compatibility without redesigning the PCB layout.