Taiwan Semiconductor Corporation DBL201G

Overview

DBL201G from Taiwan Semiconductor is a 2A, 50V standard quad bridge rectifier in DBL package, featuring 50A peak surge current, 1.15V max forward voltage at 2A/25°C, and AEC-Q101 qualification option (DBL201GH). It serves as AC-to-DC conversion core in compact offline power supplies.

For engineers reviewing the DBL201G datasheet, DBL201G pinout, DBL201G application, or DBL201G equivalent, key selection factors include VRRM=50V, IF=2A, IFSM=50A, TJmax=150°C, and DBL package thermal resistance RθJA=40°C/W for thermal design validation.

Technical Context

This device integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. Its molded DBL package provides UL 94V-0 flammability rating and matte tin-plated leads compliant with J-STD-002 solderability.

Designed for high-reliability industrial and automotive-grade power conversion, it supports continuous operation up to 150°C junction temperature and withstands 8.3ms half-sine surge currents up to 50A, with reverse leakage ≤2µA at 25°C and ≤500µA at 125°C.

Key Specifications

Pinout & Package

DBL201G uses the DBL surface-mount package (4.8 × 5.8 × 2.2 mm), with matte tin-plated leads and polarity marked on top surface. The quad bridge has two AC input pins and one DC+ and one DC− output terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU2K and GBU2A, DBL201G delivers superior power density (4.8×5.8mm), lower thermal resistance (RθJA=40°C/W), and UL recognition out-of-box-making it optimal for space-constrained, thermally sensitive, and safety-certified designs.

Availability

DBL201G is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED driver power stages requiring stable component supply and consistent parametric performance across production lots.

Supply support for DBL201G 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 DBL201G belongs to TSC's standard bridge rectifier product line, engineered for cost-sensitive, high-volume AC-DC conversion where reliability, regulatory compliance, and thermal efficiency are critical in compact PCB layouts.

FAQ

What is the maximum junction temperature rating for DBL201G?

The DBL201G has a maximum junction temperature (TJ max) of +150°C, enabling operation in high-ambient environments such as enclosed power adapters or industrial control enclosures. This rating is validated per JEDEC standards and supported by its RθJA of 40°C/W. Derating curves in the DBL201G datasheet define safe operating current versus ambient temperature, and the device must be mounted on a PCB with adequate copper area to maintain TJ ≤150°C under full load.

Is DBL201G RoHS and halogen-free compliant?

Yes, DBL201G is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and all terminations use matte tin plating meeting J-STD-002 solderability requirements. These attributes are confirmed in Taiwan Semiconductor's official compliance documentation and apply to all DBL201G units shipped under version K2103 and later.

Does DBL201G have UL recognition?

Yes, DBL201G is UL Recognized under file number E-326854, covering flammability (UL 94V-0), dielectric strength, and construction safety for end-product certification. This recognition applies to the standard DBL201G variant and is verified through third-party testing. Engineers may reference this file number during UL listing submissions for power supplies using DBL201G as the primary rectifier.

What is the forward voltage specification for DBL201G at rated current?

The DBL201G specifies a maximum forward voltage (VF) of 1.15 V per diode at IF = 2 A and TJ = 25°C, measured under pulsed conditions (PW = 0.3 ms). This value reflects conduction loss across two series diodes in the bridge path, resulting in ≤2.3 V total drop at full output current-critical for efficiency calculation and thermal design in low-voltage output SMPS.

How does DBL201G differ from DBL201GH?

DBL201GH is the AEC-Q101 qualified version of DBL201G, sharing identical electrical parameters (VRRM=50V, IF=2A, VF≤1.15V) and DBL package, but subjected to additional stress tests including HTGB, TC, and UHAST per AEC-Q101 Rev D. The 'H' suffix denotes automotive qualification; DBL201G lacks this qualification and is intended for industrial/consumer applications unless explicitly tested and approved for automotive use.