Taiwan Semiconductor Corporation GBU404H

Overview

GBU404H from Taiwan Semiconductor is a 4A, 400V repetitive peak reverse voltage (V_RRM) AEC-Q101 qualified standard bridge rectifier in GBU package, featuring 1500V_RMS dielectric strength, 150A non-repetitive surge current (8.3ms), and 4°C/W junction-to-case thermal resistance - used in automotive-grade AC/DC front-ends and industrial SMPS.

For engineers reviewing the GBU404H datasheet, GBU404H pinout, GBU404H application, or GBU404H equivalent, key selection criteria include V_RRM = 400V, I_F = 4A, AEC-Q101 qualification status, thermal resistance R_θJC = 4°C/W, and UL recognition E-326243 - all critical for high-reliability power conversion designs.

Technical Context

The GBU404H 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 surge events up to 150A at 25°C ambient.

Its electrical behavior is defined by forward voltage ≤1.1V at 4A/25°C, reverse leakage ≤5µA at 400V/25°C, and junction capacitance of 100pF per diode at 1MHz/4V - enabling stable rectification in high-frequency switching supplies.

Key Specifications

Pinout & Package

GBU404H uses the industry-standard GBU molded plastic package (19.0 × 13.0 × 16.5 mm), with matte tin-plated leads compliant with J-STD-002 solderability requirements and UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU404 and GBU6K, the GBU404H uniquely combines AEC-Q101 compliance with the compact GBU footprint and 4A/400V rating - making it the optimal choice for space-constrained, automotive-qualified rectification where qualification evidence and thermal performance are jointly required.

Availability

GBU404H is available at Aetrix Electronics and suitable for automotive onboard chargers, industrial LED drivers, medical AC/DC adapters, and appliance SMPS requiring stable component supply with traceable AEC-Q101 qualification.

Supply support for GBU404H 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, specializing in power devices, rectifiers, and protection components.

The GBU404H belongs to TSC's AEC-Q101-qualified bridge rectifier product line, engineered for automotive and industrial power conversion systems demanding high surge immunity, thermal robustness, and safety certification.

FAQ

What is the peak repetitive reverse voltage rating of the GBU404H?

The GBU404H has a peak repetitive reverse voltage (V_RRM) rating of 400 V. This value is fixed for the "4" suffix in the part number and confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version M2103). Exceeding 400 V in continuous reverse bias risks irreversible breakdown of the internal diodes.

Does the GBU404H meet AEC-Q101 reliability standards?

Yes, the "H" suffix in GBU404H explicitly denotes AEC-Q101 qualification per Taiwan Semiconductor's ordering information. This includes stress testing for temperature cycling, high-temperature operating life, and mechanical shock - validated for use in automotive power electronics where long-term reliability under thermal and vibration stress is mandatory.

What is the thermal resistance from junction to case for the GBU404H?

The junction-to-case thermal resistance (R_θJC) of the GBU404H is 4 °C/W, as specified in the Thermal Performance section of the datasheet. This low value enables effective heat transfer to an external heatsink mounted on the case, supporting sustained 4A operation within the 150°C maximum junction temperature limit.

How does the GBU404H differ from the GBU404 part number?

The GBU404H differs from GBU404 solely in AEC-Q101 qualification - both share identical electrical parameters (V_RRM = 400 V, I_F = 4 A, R_θJC = 4 °C/W), package (GBU), and pinout. The "H" suffix adds automotive-grade reliability validation but does not alter physical dimensions, marking, or soldering profile.

What is the maximum non-repetitive surge current the GBU404H can withstand?

The GBU404H supports a maximum non-repetitive forward surge current (I_FSM) of 150 A for an 8.3 ms half-sine wave at T_J = 25°C, as documented in the Absolute Maximum Ratings table. At elevated junction temperatures (125°C), this rating reduces to 80 A - a critical design constraint for inrush current limiting in capacitor-input filter stages.