Taiwan Semiconductor Corporation GBLA08

Overview

GBLA08 from Taiwan Semiconductor is a standard quad-configuration bridge rectifier with 800 V repetitive peak reverse voltage (VRRM), 4 A average forward current (IF) at TC = 50°C, and 120 A surge peak forward current (IFSM); it is widely used in AC/DC front-end stages of industrial switching mode power supplies.

For engineers reviewing the GBLA08 datasheet, GBLA08 pinout, GBLA08 application, or GBLA08 equivalent, key selection considerations include its 800 V VRRM rating, 10 °C/W junction-to-lead thermal resistance, glass-passivated junction for reliability, UL recognition (E-326243), and AEC-Q101 qualification option (GBLA08H).

Technical Context

The GBLA08 integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling direct AC-to-DC conversion without external interconnection. Its glass-passivated chip junction ensures stable reverse leakage (<5 µA at 25°C) and robustness against humidity and contamination.

Thermally, the device relies on PCB copper pad mounting (0.5" × 0.5") or heatsink mounting (2" × 3" × 0.25" Al-plate) to maintain junction temperature within –55°C to +150°C limits; R_θJA is 47 °C/W and R_θJL is 10 °C/W under specified conditions.

Key Specifications

Pinout & Package

Package: GBL - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 2.00 g typical weight, polarity marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and DB108S, the GBLA08 uniquely combines UL recognition, AEC-Q101 qualification option, 120 A surge rating, and 10 °C/W thermal resistance-making it optimal for thermally demanding, safety-critical, or automotive-adjacent power designs.

Availability

GBLA08 is available at Aetrix Electronics and suitable for industrial switching mode power supplies, LED lighting drivers, and consumer AC/DC adapters requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for GBLA08 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, specializing in rectifiers, TVS diodes, MOSFETs, and bipolar transistors since 1979.

The GBLA series belongs to TSC's standard bridge rectifier product line, engineered for high-reliability AC/DC conversion in industrial, lighting, and adapter applications where thermal robustness, safety certification, and long-term parametric stability are essential.

FAQ

What is the maximum junction temperature rating for GBLA08?

The GBLA08 has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This rating allows reliable operation in high-ambient environments such as enclosed LED drivers or industrial power supplies. Thermal design must ensure that actual junction temperature stays within this range using the specified R_θJL = 10 °C/W and appropriate PCB copper area or heatsinking. The GBLA08 datasheet defines derating curves for forward current versus ambient or case temperature.

Does GBLA08 have UL recognition and what is the file number?

Yes, the GBLA08 is UL Recognized under file number E-326243. This certification confirms compliance with UL 60950-1 and UL 62368-1 for use in information technology and audio/video equipment. UL recognition applies to the entire GBLA005–GBLA10 family, including GBLA08, and covers flammability (UL 94V-0), dielectric strength, and construction integrity. It supports end-product safety approvals without additional component-level testing.

What is the reverse leakage current specification for GBLA08 at elevated temperature?

At TJ = 125°C and rated reverse voltage, the GBLA08 exhibits a maximum reverse current (I_R) of 500 µA per diode. At 25°C, the limit is 5 µA. These values reflect worst-case leakage under pulsed test conditions (PW = 30 ms). Low IR ensures minimal standby power loss in offline power supplies and contributes to thermal stability during continuous operation, especially in high-temperature environments like enclosed lighting fixtures.

Is there an automotive-qualified version of GBLA08?

Yes-the GBLA08H is the AEC-Q101 qualified variant of GBLA08. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock per AEC-Q101 Rev D. The "H" suffix denotes automotive qualification; all electrical parameters remain identical to GBLA08. GBLA08H is intended for infotainment, body control, and ADAS power modules where extended temperature operation and reliability validation are mandatory.

What is the junction capacitance of GBLA08 and how does it affect EMI performance?

The GBLA08 has a typical junction capacitance (C_J) of 40 pF per diode at 1 MHz and 4.0 V reverse bias. This value is lower than earlier variants (e.g., GBLA04 at 95 pF), reducing high-frequency displacement current and associated common-mode noise. In SMPS designs, lower C_J helps suppress EMI generation at switching frequencies above 100 kHz, easing compliance with CISPR-22/32 standards-especially when paired with proper Y-capacitor placement and layout.