Taiwan Semiconductor Corporation GBU604H

Overview

GBU604H from Taiwan Semiconductor is a 6A, 400V repetitive peak reverse voltage (VRRM) 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 GBU604H datasheet, GBU604H pinout, GBU604H application, or GBU604H equivalent, key selection criteria include VRRM rating, AEC-Q101 qualification status, thermal resistance (R_θJC = 2°C/W), junction temperature range (–55°C to +150°C), and UL recognition (E-326243).

Technical Context

The GBU604H integrates four silicon diodes in a single-phase full-wave bridge configuration with quad internal layout, enabling direct AC-to-DC conversion without external wiring. Its 400V VRRM rating targets mid-voltage industrial and automotive power supplies where transient robustness and high IFSM are critical.

Thermally optimized with R_θJC = 2°C/W and R_θJA = 21°C/W, the device supports continuous 6A conduction at case temperatures up to 95°C. The matte tin-plated leads comply with J-STD-002 for reliable soldering, and the UL 94V-0 molding compound ensures flame-retardant PCB mounting.

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 GBU604 and GBU6K, the GBU604H uniquely combines AEC-Q101 qualification, 175A IFSM, and UL recognition - making it the only option among the three qualified for automotive lighting and industrial equipment requiring long-term reliability under thermal stress.

Availability

GBU604H is available at Aetrix Electronics and suitable for automotive LED drivers, industrial AC/DC adapters, commercial lighting ballasts, and white goods power supplies requiring stable component supply and long-lifecycle support.

Supply support for GBU604H 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 GBU604H belongs to TSC's AEC-Q101-qualified bridge rectifier product line, engineered specifically for high-reliability AC/DC conversion in harsh-environment applications including automotive lighting and industrial power systems.

FAQ

What is the peak repetitive reverse voltage (VRRM) rating of the GBU604H?

The GBU604H has a VRRM rating of 400 V. This value defines the maximum allowable sinusoidal reverse voltage the device can block repeatedly without breakdown. It corresponds to a 280V RMS AC input, making the GBU604H suitable for universal-input (85–265VAC) and 230V-only power supplies. The rating is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version N2103).

Is the GBU604H pin-compatible with other GBU-series bridge rectifiers?

Yes, the GBU604H shares the same GBU package outline and 4-pin terminal configuration (AC1, AC2, +, –) with all members of the GBU601–GBU607 family. Pinout, footprint, and mounting dimensions are identical across the series, enabling drop-in replacement within the same VRRM class - provided thermal and surge requirements remain compatible. Mechanical drawings confirm consistent lead pitch and body dimensions.

Does the GBU604H require a heatsink in 6A continuous operation?

The GBU604H can sustain 6A average forward current without an external heatsink only if the case temperature remains ≤95°C, based on its R_θJA = 21°C/W and R_θJC = 2°C/W ratings. In enclosed or high-ambient environments (>50°C), a heatsink or substantial PCB copper pour is recommended. Thermal derating curves in the datasheet show usable current drops to ~4.5A at 100°C case temperature.

What does the "H" suffix signify in GBU604H?

The "H" suffix in GBU604H denotes AEC-Q101 qualification. This means the device has undergone rigorous automotive-grade reliability testing - including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). It is not merely a packaging variant; the "H" version undergoes additional screening and traceability controls beyond the standard GBU604.

How does the GBU604H's junction capacitance affect EMI performance?

The GBU604H exhibits a typical junction capacitance (C_J) of 211 pF per diode at 1 MHz and 4.0 V reverse bias. This value influences high-frequency switching noise and common-mode EMI generation during commutation. Lower C_J reduces dv/dt-induced displacement current, helping meet CISPR-22/32 conducted emission limits - especially critical in compact, unshielded lighting and adapter designs.