GBU401

Overview

The GBU401 is a single-phase glass-passivated bridge rectifier manufactured by SMC Diode Solutions. It features a maximum average forward rectified current of 4.0A and a repetitive peak reverse voltage of 400V. The device utilizes a GBU package, which is an in-line miniature form factor designed for surface-mount or through-hole integration depending on the specific variant configuration. Key electrical parameters include a maximum non-repetitive peak surge current capability and a maximum RMS input voltage rating suitable for standard AC line applications. The component is engineered to provide reliable rectification in power supply circuits with high thermal stability.

Feature Summary

• Glass passivation provides mechanical protection and meets UL requirements for flame resistance classification 94V-0.
• High surge current capability allows the device to withstand transient overloads during startup or fault conditions.
• Low forward voltage drop minimizes conduction losses and improves overall system efficiency.

Applications

• AC-to-DC converter power supplies
• Battery chargers
• General-purpose rectification in electronic equipment

Procurement Notes

Verify the exact package variant and lead time with authorized distributors, as manufacturing sources may vary. Confirm that the ordering suffix matches the required terminal configuration and packaging type. Ensure compliance with RoHS directives if restricted substances are prohibited in the target assembly. Cross-reference the manufacturer part number against the latest datasheet revision to confirm parameter consistency before finalizing procurement orders.

Selection Notes

Select this component when a 4.0A current rating and 400V reverse voltage are required for single-phase rectification. Evaluate the thermal management requirements based on the ambient temperature and mounting surface area. Consider the physical footprint constraints of the GBU package relative to the PCB layout. Verify that the surge current ratings exceed the expected inrush currents of the load circuit to prevent device failure during operation.

Part Context

The GBU401 belongs to the GBU series of single-phase bridge rectifiers produced by SMC Diode Solutions. This series is widely used in industrial and consumer electronics for converting alternating current to direct current. The GBU package offers a compact solution compared to traditional axial-leaded bridges, allowing for higher density circuit designs while maintaining robust electrical performance and reliability standards.

Replacement Considerations

Direct replacements include equivalent 4A/400V bridge rectifiers from other manufacturers such as Diodes Incorporated or Taiwan Semiconductor, provided the pinout and package dimensions match exactly. Verify that substitute components meet the same UL recognition and flammability ratings. Ensure thermal characteristics and forward voltage drops are compatible with the original design specifications.