GBS4B

Overview

The Diotec Semiconductor GBS4B is a single-phase bridge rectifier from the GBS4A to GBS4M series, rated for an average forward current (IFAV1) of 4 A at TA = 50°C. It features a peak forward surge current (IFSM) of 80 A for half sine-waves at 50 Hz and 90 A at 60 Hz. The device has a maximum repetitive reverse voltage (VRRM) ranging from 50 V to 1000 V depending on the specific suffix variant. Forward voltage (VF) is less than 1.05 V at IF = 2 A and Tj = 25°C, with leakage current (IR) below 5 µA at VR = VRRM. Thermal resistance junction-to-case (RthC) is less than 12 K/W per device.

Feature Summary

• Single-phase bridge rectifier configuration designed for standard commercial and industrial applications
• Robust surge current handling capability suitable for mains-powered circuits
• Low thermal resistance junction-to-case for efficient heat dissipation in through-hole mounting

Applications

• General-purpose AC to DC power supply rectification
• Industrial control systems requiring reliable bridge rectification
• Consumer electronics power adapters

Procurement Notes

Verify the specific reverse voltage rating by checking the full part number suffix (e.g., GBS4B indicates a specific VRRM value within the series). Confirm compliance with RoHS and ELV directives as stated in the datasheet documentation. Ensure the ordering code matches the required voltage class for the target application circuit design.

Selection Notes

Select the GBS4B based on the required peak inverse voltage for the specific AC input line. Consider the thermal environment; derating is necessary if ambient temperature exceeds 50°C. Verify that the protective resistance and load capacitor values align with the recommended Rt and CL parameters to prevent exceeding the surge current limits during startup.

Part Context

The GBS4B belongs to the GBS4A...GBS4M family of single-phase bridge rectifiers manufactured by Diotec Semiconductor AG. This series offers various voltage ratings while maintaining a consistent 4 A average forward current capability. The components are housed in a through-mountable package suitable for general-purpose rectification tasks in electronic equipment.

Replacement Considerations

Direct replacements must match the 4 A current rating and the specific reverse voltage of the GBS4B. Equivalent bridge rectifiers should be verified for compatible thermal resistance and physical footprint dimensions to ensure mechanical fit.