Taiwan Semiconductor Corporation GBU805H

Overview

GBU805H from Taiwan Semiconductor is an AEC-Q101 qualified 8A, 600V standard bridge rectifier in GBU package, featuring 200A surge current capability, 1500VRMS dielectric strength, and typical reverse leakage <5µA at 25°C - used in automotive-grade AC/DC front-ends and industrial SMPS.

For engineers reviewing the GBU805H datasheet, GBU805H pinout, GBU805H application, or GBU805H equivalent, key selection factors include its 600V VRRM rating, 2°C/W junction-to-case thermal resistance, AEC-Q101 qualification status, and compatibility with high-reliability lighting and adapter designs requiring robust surge handling.

Technical Context

The GBU805H integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode/common-anode topology. Its 600V repetitive peak reverse voltage (VRRM) and 420V RMS reverse voltage rating support universal-input offline rectification up to 265VAC.

Thermally optimized for PCB mounting, it delivers 21°C/W junction-to-ambient resistance and sustains 8A average forward current with derating above 75°C case temperature. Junction capacitance is 94pF per diode at 1MHz and 4V reverse bias.

Key Specifications

Pinout & Package

Package: GBU - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 4.0g weight, polarity marked on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU805 and GBU8K, the GBU805H uniquely combines AEC-Q101 qualification, GBU surface-mount package, and 2°C/W thermal resistance - making it optimal for space-constrained, high-reliability AC/DC conversion where qualification and thermal performance are jointly critical.

Availability

GBU805H is available at Aetrix Electronics and suitable for automotive lighting systems, industrial SMPS front-ends, and medical-grade AC adapters requiring stable component supply and long-term lifecycle assurance.

Supply support for GBU805H 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 global industrial, automotive, and consumer markets since 1979.

The GBU series was designed specifically for high-reliability, high-surge AC/DC rectification in space-constrained applications - emphasizing AEC-Q101 compliance, thermal efficiency, and UL recognition for safety-critical power conversion.

FAQ

What is the peak repetitive reverse voltage rating of the GBU805H?

The GBU805H has a repetitive peak reverse voltage (VRRM) rating of 600 V. This value defines the maximum instantaneous reverse voltage the device can block repeatedly without breakdown. It corresponds to a 420 V RMS reverse voltage rating and supports universal AC inputs up to 265 VAC with appropriate design margin. The rating is validated per JEDEC standards and confirmed in Taiwan Semiconductor's M2103 datasheet revision.

Is the GBU805H suitable for automotive applications?

Yes, the GBU805H is AEC-Q101 qualified, making it suitable for automotive applications such as LED headlamp drivers, body control modules, and infotainment power supplies. Its qualification includes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature reverse bias. The GBU805H's 150°C maximum junction temperature and low IR at elevated temperatures further support under-hood deployment.

What is the thermal resistance from junction to case for the GBU805H?

The junction-to-case thermal resistance (R_θJC) of the GBU805H is 2°C/W. This low value enables efficient heat transfer from the silicon die to the PCB copper pour or external heatsink. When mounted on a 25 mm² 2-oz copper pad, the device achieves effective thermal management for continuous 8A operation up to 75°C case temperature, as specified in the derating curve of the GBU805H datasheet.

How does the GBU805H differ from the GBU805?

The GBU805H differs from the GBU805 solely by AEC-Q101 qualification - all electrical parameters (VRRM = 600 V, IFSM = 200 A, VF ≤ 1.1 V), package (GBU), pinout, and thermal specs are identical. The "H" suffix denotes automotive qualification, including additional reliability testing and traceability. For non-automotive industrial or commercial use, GBU805 remains functionally equivalent but lacks formal automotive validation.

What is the typical junction capacitance of the GBU805H per diode?

The typical junction capacitance (C_J) of the GBU805H is 94 pF per diode, measured at 1 MHz and 4.0 V reverse bias. This value applies to the GBU805–GBU807 variants and is lower than earlier GBU801–GBU804 versions (211 pF), supporting reduced high-frequency switching noise in PFC and resonant topologies. The capacitance directly impacts EMI filter design and snubber sizing in high-frequency SMPS designs using the GBU805H.