KBL404

Overview

The KBL404 is a single-phase glass passivated bridge rectifier manufactured by EIC Semiconductor Inc. It features a maximum average forward current of 4.0 A and a maximum repetitive peak reverse voltage of 400 V. The device has a maximum RMS voltage rating of 280 V and a maximum DC blocking voltage of 400 V. Electrical characteristics include a maximum forward voltage of 1.05 V at 2 A, a maximum DC reverse current of 10 µA at 25 °C, and a peak forward surge current capability of 120 A. The typical thermal resistance from junction to ambient is 21 °C/W.

Feature Summary

• Glass passivated chip construction for high reliability
• Low reverse leakage current and low forward voltage drop
• High surge current capability with UL94V-0 flame retardant epoxy

Applications

• Printed circuit board installations
• General purpose AC to DC conversion
• Power supply circuits requiring 400 V reverse voltage

Procurement Notes

Verify the component against the official EIC Semiconductor datasheet revision 06 dated September 20, 2020. Confirm that the part number matches the specific 400 V rating within the KBL400-KBL410 series. Ensure the package type corresponds to the mechanical dimensions provided in the documentation.

Selection Notes

Select this component when a 4.0 A bridge rectifier with a 400 V reverse voltage rating is required. Consider the 120 A surge current capability for applications with potential inrush currents. Verify that the operating temperature range of -55 °C to +150 °C meets the environmental requirements of the target system.

Part Context

The KBL404 belongs to the KBL400 through KBL410 series of glass passivated bridge rectifiers. This family offers varying reverse voltage ratings from 50 V to 1000 V while maintaining a consistent 4.0 A average forward current rating. The series utilizes a molded plastic case suitable for PCB mounting.

Replacement Considerations

Other components from the same KBL400-KBL410 series may be considered if different voltage ratings are acceptable. Cross-referencing with other manufacturers offering identical KBL package dimensions and electrical specifications is recommended for supply chain flexibility.

FAQ

What is the maximum non-repetitive peak forward surge current?

The maximum non-repetitive peak forward surge current is 120 A for a single half-sine wave of 8.3 ms duration at an initial junction temperature of 25 °C.

How does capacitive loading affect the current rating?

For capacitive loads, the output current must be derated by 20% compared to resistive or inductive load conditions.

What is the typical thermal resistance value?

The typical thermal resistance from junction to ambient (RθJA) is 21 °C/W, measured with the unit mounted on a 3" x 3" x 0.11" thick copper plate.