KBL400

Overview

The KBL400 is a single-phase silicon bridge rectifier manufactured by EIC Semiconductor Inc. It features glass passivated chips and supports a maximum repetitive peak reverse voltage of 50 V, with corresponding maximum RMS and DC blocking voltages of 35 V and 50 V respectively. The device provides a maximum average forward current of 4.0 A at an ambient temperature of 40°C and withstands a peak forward surge current of 120 A for a half-sine wave cycle. Electrical characteristics include a maximum forward voltage drop of 1.05 V per diode at 2 A, and a maximum DC reverse leakage current of 10 µA at 25°C. The component operates within a junction temperature range of -55 to +150°C.

Feature Summary

• Glass passivated chip construction ensures high reliability and low reverse current.
• High current capability with a 4.0 A average forward rating and 120 A surge capacity.
• Low forward voltage drop minimizes power loss during conduction.
• Molded plastic case with UL94V-0 flame retardant epoxy suitable for PCB mounting.

Applications

• Printed circuit board assembly for AC to DC conversion
• Power supply units requiring single-phase rectification
• General purpose rectification in electronic equipment

Procurement Notes

Verify the manufacturer part number against official datasheets to confirm specifications such as voltage ratings and package dimensions. Ensure compliance with environmental directives like RoHS if required by the application. Check terminal solderability standards and polarity markings on the physical component to guarantee correct installation orientation on the printed circuit board.

Selection Notes

Select this component based on the required peak inverse voltage and average forward current ratings for the specific circuit design. Consider the thermal resistance and operating temperature range when designing heat dissipation strategies. Verify that the surge current capability meets the transient requirements of the load to prevent device failure during startup or fault conditions.

Part Context

The KBL400 belongs to the KBL series of miniature single-phase bridge rectifiers produced by EIC Semiconductor Inc. This series offers various voltage ratings ranging from 50 V to 1000 V while maintaining a consistent 4.0 A current rating. The components are designed for through-hole mounting and utilize glass passivation technology to enhance durability and electrical performance in standard rectifier applications.

Replacement Considerations

Compatible substitutes include the KBL400 from Panjit International and Diodes Incorporated. These alternatives share identical electrical parameters and mechanical footprint, allowing for direct pin-to-pin replacement without modifying the printed circuit board layout or circuit design.

FAQ

What is the maximum average forward current rating?

The maximum average forward current is 4.0 A at an ambient temperature of 40°C.

How does capacitive loading affect the current rating?

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

What is the typical thermal resistance value?

The typical thermal resistance from junction to ambient is 21 °C/W when mounted on a 3" x 3" copper plate.