KBU804G T0G

Overview

The KBU804G T0G is a glass passivated bridge rectifier from the KBU series manufactured by Taiwan Semiconductor Corporation. It provides a maximum repetitive peak reverse voltage of 400V, a maximum RMS voltage of 280V, and a maximum DC blocking voltage of 400V. The device supports a maximum average forward rectified current of 8A and a peak forward surge current of 200A for an 8.3ms single half-sine wave. Typical instantaneous forward voltage is 1.0V at 4A and 1.1V at 8A. Maximum DC reverse current is 5μA at 25°C and 500μA at 125°C. Operating junction and storage temperature ranges are -55°C to +150°C.

Feature Summary

• Glass passivated junctions ensure long-term reliability and stability under various operating conditions.
• High case dielectric strength allows for robust performance in demanding electrical environments.
• Compliant with RoHS Directive 2011/65/EU and WEEE 2002/96/EC standards for environmental safety.
• Halogen-free molding compound meets IEC 61249-2-21 definitions for material composition.

Applications

• Adapters
• Chargers
• Battery Chargers

Procurement Notes

Verify the specific ordering suffix 'T0G' corresponds to the green compound packing code as documented. Confirm compliance requirements such as UL recognition file E-326243 and JESD 201 class 1A whisker test status match project specifications. Ensure mechanical mounting torque does not exceed 0.56 Nm during installation to prevent damage to the component.

Selection Notes

Select this component when a 400V reverse voltage rating and 8A continuous current capacity are required. Consider the KBU package form factor for printed circuit board mounting applications. Evaluate thermal resistance values if heatsinking or derating curves are necessary for high ambient temperature operations.

Part Context

This part belongs to the KBU801G through KBU807G family of glass passivated bridge rectifiers. The series offers varying voltage ratings from 50V to 1000V while maintaining a consistent 8A current capability. The KBU804G specifically addresses the 400V requirement within this standardized product line.

Replacement Considerations

Direct substitutes include other KBU804 variants from different manufacturers offering identical 400V/8A specifications. Verify pinout compatibility and physical dimensions before substitution to ensure proper fit on existing PCB layouts.

FAQ

What is the typical junction capacitance per leg?

The typical junction capacitance per leg is 400pF, measured at 1MHz with an applied reverse voltage of 4.0V DC.

Does the 'G' suffix indicate a functional change?

No, the 'G' suffix indicates the use of a green halogen-free molding compound according to IEC 61249-2-21 definitions, without altering electrical functionality.

What is the maximum mounting torque allowed?

The maximum mounting torque is 0.56 Nm to prevent mechanical damage to the bridge rectifier case.