Taiwan Semiconductor Corporation GBL04

Overview

GBL04 from Taiwan Semiconductor is a 4A, 400V repetitive peak reverse voltage (VRRM) standard bridge rectifier in GBL package, featuring glass-passivated junctions, <1.1V forward voltage at 4A/25°C, <5µA reverse current at 25°C, and AEC-Q101 qualification option. It serves as the AC-to-DC input stage in compact off-line SMPS and LED drivers.

For engineers reviewing the GBL04 datasheet, GBL04 pinout, GBL04 application, or GBL04 equivalent, key selection criteria include VRRM margin for 230VAC surge handling, thermal resistance (RθJA = 32°C/W), junction temperature limit (150°C), and UL recognition (E-326243) for safety-compliant designs.

Technical Context

The GBL04 integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. Its glass-passivated junction ensures stable leakage performance up to 125°C and supports high-reliability operation in thermally constrained PCB layouts.

Thermal design relies on its 8°C/W junction-to-case (RθJC) and 13°C/W junction-to-lead (RθJL) resistances, enabling 4A continuous conduction at TC = 50°C without forced cooling when mounted on ≥0.5"×0.5" copper pads per JEDEC standards.

Key Specifications

Pinout & Package

Package: GBL - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 2.00g 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 GBU4K and KBP204, the GBL04 offers superior thermal efficiency (RθJA = 32°C/W vs. 40°C/W) and lower leakage (≤5µA), making it optimal for space-constrained, thermally sensitive, or low-standby-power designs-without requiring PCB redesign.

Availability

GBL04 is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and industrial AC-DC adapters requiring stable component supply, long-lifecycle assurance, and traceable sourcing.

Supply support for GBL04 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, consumer, and automotive markets since 1979.

The GBL series was developed for high-reliability, cost-optimized AC-DC front-end rectification in space-constrained applications, emphasizing thermal efficiency, safety certification readiness, and AEC-Q101 scalability.

FAQ

What is the maximum continuous forward current rating for GBL04 at 50°C case temperature?

The GBL04 is rated for 4A average forward current (IF) at TC = 50°C, as specified in the Absolute Maximum Ratings table. This value assumes proper PCB copper pad layout per JEDEC standards (0.5"×0.5" minimum). At higher case temperatures, derating applies per the Forward Current Derating Curve in the datasheet.

Does GBL04 have UL recognition, and what is the file number?

Yes, the GBL04 is UL Recognized under File # E-326243, confirming compliance with UL 60747-5 for discrete semiconductors. This recognition supports end-product safety certifications such as UL 62368-1 and IEC 62368-1 for power supplies using the GBL04.

Is there an AEC-Q101 qualified version of GBL04, and how is it identified?

Yes, the AEC-Q101 qualified version is designated GBL04H. The "H" suffix in the ordering code indicates full AEC-Q101 Rev D qualification, including stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD).

What is the typical junction capacitance of GBL04, and why does it matter?

The GBL04 exhibits 95 pF typical junction capacitance per diode at 1 MHz and 4.0V reverse bias. This low C_J value helps suppress high-frequency noise coupling into upstream EMI filters and improves overall conducted emissions performance in switch-mode power supplies.

How does the thermal resistance of GBL04 compare between junction-to-case and junction-to-ambient?

The GBL04 has RθJC = 8°C/W and RθJA = 32°C/W. The 4× difference reflects the dominant thermal path through the PCB copper; effective heat spreading via ≥0.5"×0.5" pads reduces effective RθJA significantly, enabling reliable 4A operation without external heatsinks.