Taiwan Semiconductor Corporation GBU1005-K

Overview

GBU1005-K from Taiwan Semiconductor is a 10A, 600V standard bridge rectifier in GBU package, configured as a quad diode arrangement for full-wave AC-to-DC conversion. It delivers 200A surge current capability, operates up to 150°C junction temperature, and is UL Recognized (E-326243) for use in compact power adapters and SMPS.

For engineers reviewing the GBU1005-K datasheet, GBU1005-K pinout, GBU1005-K application, or GBU1005-K equivalent, key selection factors include its 600V repetitive peak reverse voltage, 0.98V max forward voltage at 10A/25°C, 1.7°C/W junction-to-lead thermal resistance, and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

The GBU1005-K integrates four silicon PN-junction diodes in a single-phase bridge configuration, enabling full-wave rectification without external interconnection. Its thermal design supports mounting on an aluminum heat sink (4" × 6" × 0.25") to maintain R_θJA at 7.6°C/W and sustain continuous 10A conduction.

Electrical behavior is characterized by low forward voltage drop (0.92V typ. at 5A/25°C), tight reverse leakage (≤5μA at 25°C), and stable junction capacitance (68pF at 1MHz/4V), making it suitable for high-efficiency, noise-sensitive switching power supplies.

Key Specifications

Pinout & Package

GBU1005-K uses the standardized GBU molded plastic package (UL 94V-0 rated), with matte tin-plated leads solderable per J-STD-002 and compliant with JESD 201 Class 1 whisker testing. Polarity is marked on the case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU1005-K, the ON Semiconductor GBU1005 offers alternate safety certification but higher thermal resistance, while the Diodes Inc. KBU1005 requires careful variant selection to match RoHS/halogen-free compliance - making GBU1005-K optimal for new consumer power designs requiring full environmental alignment.

Availability

GBU1005-K is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat-panel TV power stages requiring stable component supply, consistent parametric performance, and full regulatory documentation.

Supply support for GBU1005-K 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 power and protection markets since 1979.

The GBU series reflects TSC's focus on high-reliability, cost-optimized bridge rectifiers for mainstream consumer and industrial power conversion - emphasizing thermal robustness, safety certification, and environmental compliance.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for GBU1005-K?

The GBU1005-K has a VRRM rating of 600 V, verified per Taiwan Semiconductor's datasheet revision B2305. This value is fixed for the GBU1005-K variant and distinguishes it from the GBU1006-K (800 V) and GBU1007-K (1000 V). The 600 V rating provides sufficient margin for 230 VAC nominal inputs with transient peaks up to 340 V, making GBU1005-K appropriate for universal-input SMPS designs.

Does GBU1005-K support surface-mount or through-hole assembly?

GBU1005-K uses a through-hole GBU package with four axial leads designed for wave or selective soldering. It is not a surface-mount device; the package outline specifies lead spacing and body dimensions compatible with standard 0.1" pitch PCB footprints. The matte tin plating meets J-STD-002 solderability requirements, and the 3.96 g weight confirms mechanical stability during reflow-handling processes.

Is GBU1005-K RoHS and halogen-free compliant?

Yes, GBU1005-K is both RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the manufacturer's datasheet. The molding compound is UL 94V-0 rated, and the device carries no brominated or chlorinated flame retardants. This compliance is certified for the GBU1005-K part number specifically and applies to all units shipped under version B2305 and later.

What is the forward voltage drop of GBU1005-K at full rated current?

At 10 A and 25°C junction temperature, the GBU1005-K exhibits a maximum forward voltage drop of 0.98 V per diode pair (i.e., across the bridge output), with a typical value of 0.92 V. This specification is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction loss - resulting in ≤9.8 W total dissipation at full load, which informs heatsinking requirements in final designs using GBU1005-K.

Can GBU1005-K replace GBU1004-K in an existing design?

No - GBU1004-K is rated for 400 V VRRM, while GBU1005-K is rated for 600 V. Although both share the same 10 A current rating and GBU package, substituting GBU1005-K for GBU1004-K may over-specify voltage margin without harm, but replacing GBU1005-K with GBU1004-K risks failure under 230 VAC transients. Always verify line-voltage stress margins before interchange; GBU1005-K is not a drop-in replacement for lower-voltage variants.