KBPF404G B0G

Overview

The KBPF404G is a 4A, 400V glass passivated bridge rectifier from Taiwan Semiconductor Corporation. It belongs to the KBPF series, which includes variants with reverse voltages up to 1000V. The device features a quad configuration in a KBPF package. Key electrical parameters include a forward current of 4A, a repetitive peak reverse voltage of 400V, and a surge peak forward current of 120A. The maximum junction temperature is 150°C. Typical thermal resistance from junction to lead is 12°C/W, while junction-to-ambient is 56°C/W. Forward voltage is typically 1.1V at 2A and 25°C.

Feature Summary

• Glass passivation provides reliable low-cost construction utilizing molded plastic technique.
• High surge current capability supports demanding transient loads.
• Compliant with RoHS Directive 2011/65/EU and WEEE 2002/96/EC standards.
• Halogen-free according to IEC 61249-2-21 requirements.

Applications

• General purpose AC/DC bridge full wave rectification for SMPS
• Space constrained appliance applications

Procurement Notes

Verify the specific part number suffix against the manufacturer's datasheet to confirm voltage rating and packaging details. Ensure compliance with UL Recognized File # E-326243 if required for end-product certification. Confirm that the ordering code matches the desired packing quantity and tube specifications provided in the official documentation.

Selection Notes

Select the KBPF404G when a 400V repetitive peak reverse voltage is required for 4A applications. Consider higher voltage variants within the KBPF40xG series if system design demands increased reverse voltage margins. Evaluate thermal performance based on PCB copper pad size, as junction-to-ambient resistance depends on mounting conditions.

Part Context

The KBPF404G is part of the KBPF404G-KBPF407G family manufactured by Taiwan Semiconductor Corporation. This series offers glass passivated bridge rectifiers with varying reverse voltage ratings from 400V to 1000V. All members share the same 4A forward current rating and KBPF package style, differing primarily in their peak reverse voltage capabilities.

Replacement Considerations

Direct substitutes within the same family include KBPF405G (600V), KBPF406G (800V), and KBPF407G (1000V). These parts maintain identical current ratings and package dimensions, allowing for pin-compatible upgrades where higher voltage tolerance is needed without altering board layout.

FAQ

What is the typical forward voltage drop at rated current?

The typical forward voltage is 1.1V when measured at an forward current of 2A and a junction temperature of 25°C.

How does the junction capacitance vary with reverse voltage?

At 1MHz frequency and 4.0V reverse bias, the typical junction capacitance is 39pF. The capacitance decreases as the applied reverse voltage increases, as shown in the typical characteristics curves.

What are the absolute maximum ratings for storage temperature?

The storage temperature range is -55°C to +150°C, matching the operating junction temperature limits.