Taiwan Semiconductor Corporation GBU407

Overview

GBU407 from Taiwan Semiconductor is a 4A, 1000V peak repetitive reverse voltage (V_RRM) standard quad bridge rectifier in GBU package, rated for 150A non-repetitive surge current (I_FSM, 8.3ms), with 1.1V max forward voltage at 4A and 25°C, used in high-voltage AC/DC front-end conversion for industrial power supplies.

For engineers reviewing the GBU407 datasheet, GBU407 pinout, GBU407 application, or GBU407 equivalent, key selection criteria include verified V_RRM = 1000V, I_F = 4A continuous rating, thermal resistance R_θJC = 4°C/W, UL recognition (E-326243), and AEC-Q101 qualification availability (GBU407H variant).

Technical Context

The GBU407 integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling direct AC-to-DC conversion without external interconnection. Its 1000V V_RRM supports input stages handling 700V RMS line voltage (e.g., 3-phase rectified or 600V DC bus applications), and its 150A I_FSM withstands cold-start surges in high-power SMPS.

Thermally, the device features low junction-to-case resistance (4°C/W) and operates up to 150°C junction temperature, with 1500V_RMS dielectric isolation between case and terminals - critical for reinforced insulation in Class II power adapters and lighting drivers meeting IEC 61347/62368.

Key Specifications

Pinout & Package

Package: GBU - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 4.0g weight, 20 pcs/tube packing. Dimensions per Taiwan Semiconductor Package Outline Drawing GBU (Rev. M2103).

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU407, GBU10K offers higher current and better thermal performance but demands board rework, while GBU4J reduces voltage margin by 40% - making GBU407 the optimal balance of 1000V robustness, 4A capability, and drop-in GBU footprint for industrial and high-surge applications.

Availability

GBU407 is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, LED streetlight drivers, and universal-input AC/DC adapters requiring stable component supply, long-lifecycle support, and compliance with UL, RoHS, and halogen-free standards.

Supply support for GBU407 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, computing, 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 voltage margin, surge resilience, and regulatory compliance over raw current density.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) specified for GBU407?

The GBU407 has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, as confirmed in Taiwan Semiconductor's Absolute Maximum Ratings table for the GBU401–GBU407 family. This rating applies across the full operating temperature range and defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown. The GBU407 is the highest-voltage variant in the GBU40x series, with V_RRM scaling linearly from 50V (GBU401) to 1000V (GBU407).

Does GBU407 have AEC-Q101 qualification, and how is it designated?

Yes, the AEC-Q101 qualified version of GBU407 is designated as GBU407H per Taiwan Semiconductor's Ordering Information. The "H" suffix explicitly indicates qualification to AEC-Q101 stress test standards for discrete semiconductors, covering HTOL, TC, HTRB, and ESD. Standard GBU407 is not AEC-Q101 qualified; only GBU407H carries this automotive-grade reliability validation.

What is the forward voltage (V_F) of GBU407 at its rated 4A current?

The forward voltage (V_F) of GBU407 is specified as ≤1.1 V at I_F = 4 A and T_J = 25°C, per the Electrical Specifications table. This value represents the maximum voltage drop across the entire bridge (two diodes conducting in series), resulting in ≤4.4 W total conduction loss. At elevated junction temperatures (e.g., 125°C), V_F decreases slightly due to negative temperature coefficient of silicon diodes.

What is the thermal resistance from junction to case (R_θJC) for GBU407, and why does it matter?

The junction-to-case thermal resistance (R_θJC) for GBU407 is 4°C/W, as published in the Thermal Performance section. This low value enables efficient heat transfer from the silicon die to an external heatsink mounted directly to the case - critical for sustaining 4A continuous current in high-ambient environments. With R_θJC = 4°C/W, a 3W power dissipation yields only a 12°C temperature rise from junction to case, simplifying thermal design.

Is GBU407 UL recognized, and what is its recognition file number?

Yes, GBU407 is UL Recognized under file number E-326243, as stated in the FEATURES section of the datasheet. This recognition confirms compliance with UL 60747-4 for discrete semiconductors and validates the device's electrical insulation, flammability (UL 94V-0), and construction integrity. UL recognition reduces time and cost for end-equipment safety certification, especially in Class II power supplies and lighting products.