GBU8K

Overview

The onsemi GBU8K is a single-phase silicon bridge rectifier designed for general-purpose power supply applications. It features a peak repetitive reverse voltage (Vrrm) of 800 V and an average forward rectified current (If) of 8 A at 45°C ambient temperature. The device supports a peak non-repetitive forward surge current (Ifsm) of 200 A for a single half-sine wave under specified conditions. Electrical characteristics include a maximum peak forward voltage (Vf) of 1 V at 8 A and a maximum peak reverse leakage current (Ir) of 50 μA at 800 V. The component operates within a junction temperature range of -55°C to +150°C and utilizes a GBU through-hole package with four pins.

Feature Summary

• Glass-passivated silicon junction construction provides reliable performance and high surge overload capability.
• Molded plastic case meets Underwriters Laboratory flammability classification 94V-0.
• Terminals are solderable per MIL-STD-202, Method 208, allowing flexible mounting positions.

Applications

• General-purpose AC-to-DC conversion in power supplies
• Bridge rectification circuits for resistive or inductive loads
• Printed circuit board mounting in industrial electronics

Procurement Notes

Verify the specific manufacturer source document when sourcing this component, as datasheet parameters may vary between original equipment manufacturers and third-party producers. Confirm that the received parts match the electrical ratings and mechanical dimensions listed in the official specification sheet for the intended application environment.

Selection Notes

Select the GBU8K when an 800 V reverse voltage rating and 8 A continuous current capacity are required in a GBU through-hole package. Ensure the thermal management design accounts for the 1 V forward voltage drop at full load to maintain junction temperatures within the specified 150°C limit during operation.

Part Context

The GBU8K belongs to the GBU8 series of glass-passivated single-phase bridge rectifiers from onsemi. This series offers standardized voltage ratings ranging from 50 V to 800 V, sharing common mechanical and electrical characteristics such as the 8 A current rating and 200 A surge capability across different voltage variants.

Replacement Considerations

Compatible substitutes include other GBU8K variants from different manufacturers, such as MCC GBU8K-BP, provided they meet the same 800 V, 8 A, and GBU package specifications. Verify pinout compatibility and thermal performance before substitution.