SMC Diode Solutions GBU806

Overview

GBU806 from Diodes Incorporated is an 8A standard recovery bridge rectifier in GBU package, rated for 600V repetitive peak reverse voltage (V_RRM), 1.0V max forward voltage at 4A, and 5µA max reverse leakage at 25°C. It features glass-passivated die construction, 1500V_RMS case dielectric strength, and 200A non-repetitive surge capability - used in AC/DC front-end power supplies for industrial motor drives.

For engineers reviewing the GBU806 datasheet, GBU806 pinout, GBU806 application, or GBU806 equivalent, key selection criteria include V_RRM margin for line-voltage transients, thermal resistance (2.2°C/W junction-to-case), I_FSM rating for inrush handling, and UL recognition (E95060) for safety-compliant designs.

Technical Context

The GBU806 integrates four silicon diodes in a single-phase full-wave bridge configuration with standard recovery characteristics (t_rr not specified but typical for standard recovery bridges). Its 600V V_RRM supports universal-input (85–265V_AC) rectification, and the 200A I_FSM enables robust startup under capacitive input loads.

Thermal performance is defined with mounting on a 50mm × 50mm × 1.6mm copper heatsink (R_θJC = 2.2°C/W), and its 130pF typical junction capacitance minimizes high-frequency noise coupling in switching supply inputs.

Key Specifications

Pinout & Package

Package: GBU - 4-pin through-hole plastic package (UL 94V-0), designed for #6 screw mounting with 5.0 in-lb max torque; weight ≈3.7 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bridge rectifier applications.

Compared with GBU6K, GBU806 offers 33% higher average current and lower forward drop; versus GBU8J, it lacks AEC-Q101 qualification but shares identical power ratings and thermal behavior - making GBU806 optimal for cost-sensitive industrial power supplies where automotive qualification is unnecessary.

Availability

GBU806 is available at Aetrix Electronics and suitable for industrial motor drives, LED street lighting power supplies, appliance control boards, and commercial HVAC fan controllers requiring stable component supply across multi-year production cycles.

Supply support for GBU806 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.

The GBU series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, thermally robust AC/DC conversion in industrial, lighting, and appliance applications where fast recovery is not required.

FAQ

What is the maximum operating junction temperature for GBU806?

The GBU806 has a specified operating junction temperature range of −55°C to +150°C. This allows reliable operation in high-ambient environments such as enclosed industrial enclosures or outdoor lighting fixtures, provided thermal design maintains T_J within limits using the 2.2°C/W R_θJC value and appropriate heatsinking.

Can GBU806 be used in place of GBU804 or GBU808?

Yes - GBU806 is pin-compatible and mechanically identical to other GBU-series rectifiers. The only difference is V_RRM: GBU804 is rated for 400V, GBU806 for 600V, and GBU808 for 800V. Substitution requires verifying that the 600V rating meets system overvoltage requirements and does not exceed necessary margin.

Is GBU806 lead-free and RoHS compliant?

Yes, GBU806 features a lead-free finish and complies with EU RoHS directives 2002/95/EC, 2011/65/EU, and 2015/863/EU. Diodes Incorporated confirms full compliance including applicable exemptions, and the device carries Halogen- and Antimony-free "Green" designation per their quality definitions.

Does GBU806 require a heatsink in all applications?

A heatsink is required to sustain the full 8.0A I_F(AV) rating - the datasheet specifies this current at T_C = +100°C, meaning case temperature must be held at or below 100°C. For lower-load applications (e.g., ≤3A continuous), natural convection may suffice, but thermal verification using R_θJC = 2.2°C/W and ambient conditions is mandatory.