Taiwan Semiconductor Corporation GBU603H

Overview

GBU603H from Taiwan Semiconductor is a 6A, 600V AEC-Q101 qualified standard bridge rectifier in GBU package, featuring 175A surge current capability, 1.1V max forward voltage at 6A, and <5µA reverse leakage at 25°C - used in automotive-grade AC/DC front-ends for lighting and adapters.

For engineers reviewing the GBU603H datasheet, GBU603H pinout, GBU603H application, or GBU603H equivalent, key selection criteria include peak reverse voltage (600V), thermal resistance (R_θJC = 2°C/W), AEC-Q101 qualification status, and UL recognition (E-326243) for safety-critical power conversion designs.

Technical Context

The GBU603H integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode/common-anode topology. It operates across -55°C to +150°C junction temperature range and supports 8.3ms non-repetitive surge currents up to 175A.

Thermal performance is defined by R_θJA = 21°C/W (free air) and R_θJC = 2°C/W, enabling direct heatsink mounting. Its matte tin-plated leads comply with J-STD-002 solderability standards and UL 94V-0 molding compound ensures flame resistance.

Key Specifications

Pinout & Package

Package: GBU - molded plastic case with 4-pin inline terminal configuration (AC1, AC2, +, –), UL 94V-0 rated, 4.0g weight, 0.56 N·m max mounting torque.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU603 and GBU6K, the GBU603H uniquely combines AEC-Q101 qualification, UL recognition, and halogen-free construction - making it the sole option for certified automotive and safety-critical industrial rectification where regulatory compliance drives component selection.

Availability

GBU603H is available at Aetrix Electronics and suitable for automotive lighting systems, industrial AC/DC adapters, commercial LED drivers, and medical-grade power supply input stages requiring stable component supply and long-term lifecycle support.

Supply support for GBU603H 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 automotive, industrial, and consumer markets since 1979.

The GBU series was designed specifically for high-reliability AC/DC front-end rectification in space-constrained, thermally demanding applications - emphasizing surge robustness, safety certification readiness, and automotive-grade quality.

FAQ

What is the peak repetitive reverse voltage rating of the GBU603H?

The GBU603H has a peak repetitive reverse voltage (V_RRM) rating of 600 V. This value defines the maximum AC voltage the device can block during normal operation without breakdown. It corresponds to a 420 V_RMS input, making the GBU603H suitable for universal-input (90–264 V_AC) and 230 V_AC-only power supplies. The rating is validated per JEDEC JESD22-A115A and confirmed in Taiwan Semiconductor's N2103 datasheet.

Is the GBU603H qualified to AEC-Q101, and what does that mean for design use?

Yes, the GBU603H is explicitly AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code. This means it has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and high-temperature reverse bias (HTRB). For automotive designs, this qualification validates suitability for under-hood and cabin applications where reliability under thermal and mechanical stress is mandatory - unlike the non-H variant GBU603.

What is the forward voltage drop of the GBU603H at full rated current?

The GBU603H exhibits a maximum forward voltage drop (V_F) of 1.1 V at 6 A and 25°C junction temperature, per the datasheet's Electrical Specifications table. This value increases with temperature and current; at 3 A, V_F is ≤1.0 V. The low V_F minimizes conduction losses and improves thermal efficiency in compact power supplies where heatsinking is limited.

Does the GBU603H have UL recognition, and why does it matter?

Yes, the GBU603H carries UL Recognition under file #E-326243, confirming compliance with UL 60747-4 for discrete semiconductors. This matters because UL recognition streamlines end-product safety certification (e.g., UL 62368-1) by eliminating the need for additional component-level testing. It also assures dielectric strength (1500 V_RMS) and flammability (UL 94V-0) compliance - critical for commercial and medical power supplies.

What is the thermal resistance from junction to case (R_θJC) for the GBU603H, and how is it used in thermal design?

The GBU603H has a junction-to-case thermal resistance (R_θJC) of 2°C/W, measured under standardized conditions. This parameter enables accurate calculation of case temperature rise above ambient when power dissipation is known: T_case = T_junction − (P_diss × 2). When mounted to a heatsink via screw or clip, R_θJC forms the first segment of the thermal path - allowing engineers to size interface materials and heatsink thermal mass for sustained 6 A operation at 150°C max junction temperature.