KBF404

Overview

The Good-Ark Semiconductor KBF404 is a glass-passivated single-phase bridge rectifier designed for general-purpose AC-to-DC full-wave rectification. It features a maximum average rectified output current of 4.0A and a maximum repetitive peak reverse voltage of 400V. The device utilizes a KBF through-hole package with matte tin-plated leads, ensuring high surge current capability and reliability in high-temperature environments up to 260°C for 10 seconds. Operating junction temperatures range from -55°C to +150°C, with a typical junction capacitance of 34pF at 4V and 1MHz.

Feature Summary

• Glass passivation provides stable electrical characteristics and low leakage current.
• High surge current capability supports robust performance under transient load conditions.
• Moisture sensitivity level 1 per J-STD-020 ensures reliable handling and storage.
• Halogen-free molding compound meets IEC 61249-2-21 definitions for environmental safety.

Applications

• AC-to-DC bridge full-wave rectification in TV and monitor power supplies.
• Switching mode power supplies (SMPS) for adapters and home appliances.
• Rectification circuits in printers and audio equipment.

Procurement Notes

Verify the component against the official Good-Ark Semiconductor datasheet Doc.USKBF401-KBF410xSG2.0 dated Oct. 2023. Confirm that the part number matches the specific 400V rating within the KBF401-KBF410 series. Ensure the package type is KBF and check for RoHS compliance and halogen-free status as specified in the mechanical data section of the document.

Selection Notes

Select the KBF404 when a 400V peak reverse voltage is required for single-phase bridge rectification applications. This model is suitable for circuits demanding a 4.0A continuous output current without a heatsink. Consider the thermal resistance values and derating curves if operating near the maximum temperature limits or in enclosed spaces requiring efficient heat dissipation.

Part Context

The KBF404 belongs to the KBF401-KBF410 series of glass-passivated single-phase bridge rectifiers manufactured by Good-Ark Semiconductor. This family offers varying reverse voltage ratings from 100V to 1000V while maintaining a consistent 4.0A output current capability. The series is designed for PCB mounting and general-purpose rectification tasks across various consumer and industrial electronics.

Replacement Considerations

Compatible substitutes include other 400V, 4A single-phase bridge rectifiers in the KBF package. Verify pinout compatibility and thermal resistance specifications before substitution. Ensure the replacement component meets the same glass passivation and halogen-free requirements for equivalent performance and regulatory compliance.