Taiwan Semiconductor Corporation GBU1004

Overview

GBU1004 from Taiwan Semiconductor is a 10A, 400V repetitive peak reverse voltage (VRRM) standard bridge rectifier in GBU package, with typical junction capacitance of 211 pF at 1 MHz and VR = 4.0 V, forward voltage ≤1.1 V at 10 A, and reverse current ≤5 µA at 25°C - used in AC/DC front-end stages of compact switching mode power supplies.

For engineers reviewing the GBU1004 datasheet, GBU1004 pinout, GBU1004 application, or GBU1004 equivalent, key selection criteria include VRRM rating, thermal resistance (R_θJC = 2°C/W), surge capability (IFSM = 220 A), junction capacitance for EMI-sensitive designs, and AEC-Q101 qualification availability via GBU1004H variant.

Technical Context

The GBU1004 integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling AC-to-DC conversion without external interconnection. Its GBU package features matte tin-plated leads compliant with J-STD-002 and UL 94V-0 molding compound.

Thermal performance is defined by R_θJA = 21°C/W and R_θJC = 2°C/W, supporting operation up to T_J = 150°C. Junction capacitance (211 pF @ 1 MHz, VR = 4.0 V) is specified only for GBU1001–GBU1004 variants, distinguishing them from higher-voltage GBU1005–GBU1007 (94 pF).

Key Specifications

Pinout & Package

GBU1004 uses the industry-standard GBU package: molded plastic body (UL 94V-0), 4-pin single-in-line (SIP) configuration with polarity marked on top surface. Leads are matte tin-plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU1004, the GBU1004H offers identical performance with certified automotive reliability, while GBU8K trades 2 A current capacity and GBU package compatibility for doubled VRRM - making GBU1004 optimal for cost-sensitive, space-constrained 400 V-class SMPS where qualification and footprint are primary constraints.

Availability

GBU1004 is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C power adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for GBU1004 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 GBU1004 belongs to TSC's standard bridge rectifier product line, engineered for high-reliability AC/DC conversion in compact, thermally demanding power supplies - emphasizing low leakage, high surge tolerance, and consistent manufacturability across voltage grades.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for GBU1004?

The GBU1004 has a VRRM rating of 400 V, meaning it can block up to 400 V of repetitive reverse voltage across its terminals. This value is confirmed in the Absolute Maximum Ratings table for the GBU1004 row and defines the highest AC input voltage (e.g., 280 V_RMS) the device can safely rectify without breakdown. Exceeding this rating risks irreversible avalanche failure.

Does GBU1004 have AEC-Q101 qualification?

The base GBU1004 is not AEC-Q101 qualified; however, the GBU1004H variant is explicitly listed as AEC-Q101 qualified in the ordering information section. Both share identical electrical and thermal specifications, but GBU1004H undergoes additional stress testing per AEC-Q101 standards for automotive applications. For non-automotive use, GBU1004 remains fully suitable.

What is the junction capacitance (CJ) of GBU1004 and why does it matter?

The GBU1004 has a typical junction capacitance of 211 pF measured at 1 MHz and VR = 4.0 V, as specified in the Electrical Specifications table. This parameter directly affects high-frequency noise generation and EMI filter design - higher capacitance increases common-mode current, potentially raising conducted emissions. It is distinct from GBU1005–GBU1007 (94 pF), confirming voltage-grade-dependent parasitic behavior.

Can GBU1004 replace GBU1002 in an existing design?

No - GBU1004 (VRRM = 400 V) and GBU1002 (VRRM = 100 V) differ significantly in reverse voltage rating and are not interchangeable without circuit review. Substituting GBU1004 for GBU1002 introduces unnecessary cost and thermal overhead, while using GBU1002 in a 400 V design risks catastrophic failure. Always match VRRM to the peak line voltage requirement of the application.

What is the thermal resistance from junction to case (RθJC) for GBU1004?

The GBU1004 has a junction-to-case thermal resistance (R_θJC) of 2°C/W, as stated in the Thermal Performance table. This low value indicates efficient heat transfer from the silicon die to the external case surface, enabling effective conduction cooling when mounted to a heatsink or metal chassis - critical for maintaining T_J ≤ 150°C in high-power-density designs.