Taiwan Semiconductor Corporation GBU805-K

Overview

GBU805-K from Taiwan Semiconductor is a 8A, 600V repetitive peak reverse voltage (VRRM) standard single-phase bridge rectifier in GBU package, featuring 200A surge current capability, 1.1V max forward voltage at 8A/25°C, and <5µA reverse leakage at 25°C - used in AC/DC front-end stages of switching mode power supplies.

For engineers reviewing the GBU805-K datasheet, GBU805-K pinout, GBU805-K application, or GBU805-K equivalent, key selection criteria include VRRM rating, thermal resistance (R_θJC = 2°C/W), junction temperature range (–55°C to +150°C), and UL recognition (E-326243) for safety-compliant power conversion designs.

Technical Context

The GBU805-K integrates four silicon diodes in a single-phase full-wave bridge configuration with quad internal layout, enabling direct AC-to-DC rectification without external wiring. Its GBU molded package provides 1500V_RMS dielectric strength and meets UL 94V-0 flammability requirements.

Thermally, it delivers R_θJA = 21°C/W (free air) and R_θJC = 2°C/W, supporting high-power density layouts where case-to-heatsink conduction is prioritized. Reverse recovery behavior is not specified; device operates as a standard (non-fast-recovery) rectifier.

Key Specifications

Pinout & Package

Package: GBU - molded plastic case with 4 matte tin-plated leads, UL 94V-0 rated, 4.00g weight, 0.56 N·m max mounting torque. Polarity marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU805-K, GBU806-K offers higher reverse voltage headroom at identical thermal and current ratings, while GBU804-K reduces cost but sacrifices safety margin - making GBU805-K the optimal balance for 230V/265V_AC universal-input power supplies.

Availability

GBU805-K is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED lighting drivers requiring stable component supply with consistent parametric performance across production batches.

Supply support for GBU805-K 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and consumer markets since 1979.

The GBU series was designed specifically for high-reliability, cost-optimized AC/DC front-end rectification in space-constrained power supplies - emphasizing thermal robustness, safety certification, and manufacturability in automated SMT assembly.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) of the GBU805-K?

The GBU805-K has a VRRM rating of 600 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version F2103). This value defines the highest sustained reverse voltage each internal diode can block without breakdown and is critical for selecting appropriate AC input voltage ranges - for example, 600 V VRRM supports universal-input SMPS designs up to 265 V_AC with adequate safety margin. The GBU805-K is part of the GBU804-K to GBU807-K family, where VRRM scales incrementally by 200 V per variant.

Does the GBU805-K have UL recognition, and what is the file number?

Yes, the GBU805-K is UL Recognized with File # E-326243, as stated in the Features section of the official Taiwan Semiconductor datasheet. This certification applies to the entire GBU804-K through GBU807-K series and validates compliance with UL 60950-1 and UL 62368-1 for use in end-product safety evaluations. The GBU805-K's molded GBU package contributes to this qualification via its 1500 V_RMS dielectric strength and UL 94V-0 flammability rating - essential for commercial and industrial power supply approvals.

What is the forward voltage (VF) specification for the GBU805-K at full rated current?

The GBU805-K has a maximum forward voltage of 1.1 V at 8 A and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss - translating to approximately 8.8 W of power dissipation at full continuous load. At 4 A, VF is ≤1.0 V. These values are critical for thermal design, especially when using the GBU805-K in compact, unventilated enclosures where heatsinking is limited.

Is the GBU805-K RoHS compliant and halogen-free?

Yes, the GBU805-K is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. This means the molding compound contains no brominated or chlorinated flame retardants, and all homogeneous materials meet EU RoHS Directive 2011/65/EU limits for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. These attributes are required for CE marking and export to environmentally regulated markets - confirming the GBU805-K's suitability for global electronics manufacturing.

What is the thermal resistance from junction to case (RθJC) for the GBU805-K?

The GBU805-K has a junction-to-case thermal resistance (R_θJC) of 2°C/W, as published in the Thermal Performance section of the official datasheet. This low value reflects efficient internal thermal conduction from the silicon die to the outer case surface, enabling effective heat transfer to an external heatsink or copper-clad PCB area. When designing with the GBU805-K, this parameter must be combined with heatsink thermal resistance and ambient conditions to ensure junction temperature remains below +150°C - especially under sustained 8 A loads in high-temperature environments.