GBU4B

Overview

The GBU4B is a single-phase bridge rectifier from onsemi, housed in the GBU package. It features glass-passivated silicon junctions and is rated for a repetitive peak reverse voltage of 50 V with an average forward rectified current of 4 A. The device supports a maximum non-repetitive peak forward surge current of 150 A at 60 Hz. Operating characteristics include a maximum DC blocking voltage of 50 V, a maximum RMS voltage of 35 V, and a maximum average forward voltage drop of 1.1 V per element. The unit functions within a junction temperature range of -55 °C to +175 °C.

Feature Summary

• Glass passivated chip junctions provide high reliability and long-term stability under thermal stress.
• Molded plastic case material meets UL flammability classification rating 94V-0.
• High surge overload rating accommodates transient current spikes during power-up or fault conditions.

Applications

• AC-DC power supply circuits requiring compact bridge rectification.
• General-purpose rectification in low-voltage electronic equipment.
• Battery charging systems operating within specified voltage limits.

Procurement Notes

Verify component authenticity by checking for the manufacturer logo and part marking on the package surface. Confirm RoHS compliance status through official documentation, as lead-free finishes may vary by production batch. Ensure the ordering suffix matches the required packaging format, such as tape and reel or tube, before finalizing purchase orders.

Selection Notes

Select this component when a 50 V reverse voltage rating and 4 A continuous current capacity are sufficient for the application. The GBU package offers a balance between current handling and board space efficiency. Verify that the expected surge currents remain below the 150 A limit to prevent device failure during transient events.

Part Context

The GBU4B belongs to the GBU series of single-phase bridge rectifiers, which includes variants with higher voltage ratings up to 1000 V. This family utilizes a standard GBU outline for mounting compatibility across different voltage classes. The series is designed for general-purpose applications where moderate current and low voltage drops are required.

Replacement Considerations

Direct replacements must match the 4 A current rating, 50 V reverse voltage, and GBU package dimensions. Verify that alternative manufacturers offer equivalent glass-passivated junction technology and similar thermal resistance values to ensure performance parity in existing designs.