KBL406

Overview

The MDD KBL406 is a single-phase silicon bridge rectifier designed for through-hole mounting. It features a maximum repetitive peak reverse voltage of 600 V and an average forward output rectified current of 4.0 A at a case temperature of 50°C. The device supports a peak forward surge current of 125 A under JEDEC testing conditions. Electrical characteristics include a maximum DC blocking voltage of 600 V, a typical forward voltage drop of 1.0 V at 4.0 A, and a maximum DC reverse current of 10 µA at 25°C. The component operates within a junction temperature range of -65°C to +150°C and utilizes a molded plastic KBL package with solder-plated terminals.

Feature Summary

• High forward surge current capability for robust transient handling
• Low reverse leakage current across operating temperatures
• Guaranteed high-temperature soldering resistance up to 260°C
• UL flammability classification 94V-0 for the plastic package

Applications

• Printed circuit board installations requiring AC-to-DC conversion
• Power supply circuits utilizing resistive or inductive loads
• General-purpose rectification in industrial electronics

Procurement Notes

Verify that the specific order matches the original MDD KBL406 part number. Confirm compliance with RoHS and RoHS III standards as specified in the documentation. Ensure the packaging format aligns with bulk requirements, typically supplied in boxes containing 500 pieces per unit. Validate terminal solderability against MIL-STD-750 Method 2026 if strict military-grade reliability is required for the application.

Selection Notes

Select this component when a 600 V reverse voltage rating and 4 A continuous current capacity are necessary for single-phase applications. Consider the thermal resistance of 20 °C/W and the -65°C to +150°C operating range for environments with significant heat generation. Ensure the PCB layout accommodates the KBL package dimensions and allows for adequate airflow to maintain case temperatures below 50°C for full current rating adherence.

Part Context

The KBL406 belongs to the KBL series of through-hole silicon bridge rectifiers manufactured by MDD. This series includes variants with different voltage ratings ranging from 50 V to 1000 V while maintaining the same 4 A current capacity and physical footprint. The KBL package provides a compact solution for general-purpose rectification, offering mechanical stability and reliable electrical performance in standard electronic assemblies.

Replacement Considerations

Cross-reference models such as KBL406G-BP from Micro Commercial Components (MCC) offer similar specifications. Verify that substitute parts match the 600 V reverse voltage, 4 A forward current, and KBL package dimensions to ensure compatibility with existing PCB footprints and thermal management designs.