Taiwan Semiconductor Corporation GBU1505

Overview

GBU1505 from Taiwan Semiconductor is a 15A, 600V standard bridge rectifier in GBU package, featuring quad diode configuration, 220A surge current capability, 1.00V max forward voltage at 15A/25°C, and UL Recognized (E-326243) construction - used in AC/DC front-end stages of switching mode power supplies.

For engineers reviewing the GBU1505 datasheet, GBU1505 pinout, GBU1505 application, or GBU1505 equivalent, key selection criteria include repetitive peak reverse voltage (600V), average forward current (15A), thermal resistance (R_θJC = 1.0°C/W), junction temperature range (–55°C to +150°C), and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

The GBU1505 integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. It operates across –55°C to +150°C junction temperature and delivers 15A average forward current with 220A non-repetitive surge rating (t = 8.3ms).

Thermal performance is defined by R_θJC = 1.0°C/W and R_θJL = 1.5°C/W when mounted on a specified 4" × 6" × 0.25" aluminum heatsink. Reverse leakage remains ≤5 μA at 25°C and ≤500 μA at 125°C under rated V_RRM.

Key Specifications

Pinout & Package

Package: GBU - molded plastic case (UL 94V-0), matte tin-plated leads, 3.96 g weight, polarity marked on body. Dimensions: 22.30 × 18.80 × 7.90 mm (L × W × H), with 2.54 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU1505, GBU1506 provides higher reverse voltage headroom at no thermal or current penalty, while KBU1506 offers automotive-qualified assurance but with elevated forward drop - both require explicit voltage and loss budget review before substitution.

Availability

GBU1505 is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and television power modules requiring stable component supply, UL-compliant construction, and high-surge rectification capability.

Supply support for GBU1505 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 was designed specifically for high-current, high-reliability AC/DC front-end rectification in consumer and industrial power supplies - emphasizing surge robustness, thermal efficiency, and regulatory compliance.

FAQ

What is the maximum junction temperature rating for the GBU1505?

The GBU1505 has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range allows reliable deployment in thermally demanding environments such as enclosed TV power supplies or industrial adapters. The GBU1505 must be thermally managed using its low R_θJC (1.0°C/W) to stay within this limit under full 15A load.

Does the GBU1505 have UL recognition, and what is the file number?

Yes, the GBU1505 is UL Recognized under file number E-326243. This certification confirms compliance with UL 60950-1 and UL 62368-1 for use in end equipment requiring safety-agency approval. The GBU1505's UL recognition applies specifically to its GBU package construction and thermal performance as tested - critical for adapter and monitor manufacturers targeting North American markets.

What is the forward voltage specification for the GBU1505 at full rated current?

The GBU1505 specifies a maximum forward voltage (V_F) of 1.10 V at 15 A and 25°C, with typical value of 1.00 V. At elevated temperature (125°C), V_F drops to 0.92 V typical. These values directly determine conduction losses - for example, 1.10 V × 15 A = 16.5 W dissipation per device - making thermal design essential for GBU1505-based power stages.

Is the GBU1505 RoHS compliant and halogen-free?

Yes, the GBU1505 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives. This compliance is verified in TSC's material declarations and supports GBU1505 use in eco-label programs (e.g., Energy Star, EPEAT) and export to EU, Japan, and South Korea markets.

What are the mechanical dimensions and lead finish of the GBU1505 package?

GBU1505 uses the GBU package measuring 22.30 mm × 18.80 mm × 7.90 mm (L × W × H), with 2.54 mm lead pitch. Leads are matte tin-plated and solderable per J-STD-002. The package meets UL 94V-0 flammability rating and JESD 201 Class 1 whisker resistance - ensuring long-term interconnect integrity in reflow-soldered consumer electronics assemblies using the GBU1505.