Taiwan Semiconductor Corporation DBLS201G RDG

Overview

DBLS201G from Taiwan Semiconductor is a 2 A, 50 V repetitive peak reverse voltage (V_RRM) standard quad bridge rectifier in DBLS surface-mount package, featuring 50 A peak surge current (I_FSM), 1.15 V max forward voltage at 2 A, and AEC-Q101 qualification option. It serves as AC-to-DC conversion stage in compact off-line SMPS and LED drivers.

For engineers reviewing the DBLS201G datasheet, DBLS201G pinout, DBLS201G application, or DBLS201G equivalent, key selection criteria include V_RRM margin for input transient clamping, thermal resistance (R_θJL = 15 °C/W) for board-level heat dissipation, I_FSM rating for inrush handling, and RoHS/halogen-free compliance for automotive and lighting BOMs.

Technical Context

This discrete bridge rectifier integrates four silicon diodes in a single DBLS molded plastic package with matte tin-plated leads. Its quad configuration enables full-wave rectification without external interconnects, and its 150 °C maximum junction temperature supports operation in thermally constrained environments such as enclosed LED drivers.

The device exhibits 2 µA max reverse leakage at 25 °C and 500 µA at 125 °C, enabling stable DC bus hold-up under elevated ambient conditions. Thermal performance is defined by R_θJL = 15 °C/W and R_θJA = 40 °C/W, indicating efficient conduction to PCB copper and moderate dependence on airflow or heatsinking.

Key Specifications

Pinout & Package

Package: DBLS - Surface-mount, 4-terminal molded plastic case (UL 94V-0), 0.360 g weight, matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4A and MB2S, DBLS201G offers superior thermal performance (R_θJL = 15 °C/W), surface-mount scalability, and optional automotive qualification-making it optimal for space-constrained, thermally demanding, or safety-certified applications.

Availability

DBLS201G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C wall adapters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for DBLS201G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101 validation capability.

The DBLS series was developed to deliver high-reliability, surface-mount bridge rectifiers optimized for compact, high-efficiency AC/DC conversion in automotive lighting, industrial power modules, and consumer adapters.

FAQ

What is the maximum junction temperature rating for DBLS201G?

The DBLS201G has a maximum junction temperature (T_J) of +150 °C, as specified in the Absolute Maximum Ratings table. This allows reliable operation in high-ambient environments such as enclosed LED luminaires or industrial control cabinets. Derating curves in the datasheet define safe operating current versus ambient temperature, and thermal design must account for R_θJL = 15 °C/W to maintain DBLS201G within this limit under load.

Is DBLS201G pin-compatible with other DBLS2xxG variants?

Yes, all DBLS201G–DBLS209G devices share identical DBLS package dimensions, pinout, and terminal configuration. Only V_RRM (50 V to 1400 V) and corresponding V_F values differ across the family. This enables drop-in voltage-scaling during design iteration or BOM optimization without layout changes-provided the selected variant's reverse voltage rating meets system transient requirements.

Does DBLS201G meet automotive reliability standards?

The base DBLS201G is not AEC-Q101 qualified, but the DBLS201GH variant is explicitly certified to AEC-Q101. The "H" suffix denotes full qualification including HTOL, TC, HTRB, and ESD testing. For automotive lighting or infotainment power supplies, DBLS201GH must be specified; DBLS201G remains suitable for industrial and consumer applications where AEC-Q101 is not mandated.

What is the forward voltage specification for DBLS201G at rated current?

DBLS201G specifies a maximum forward voltage (V_F) of 1.15 V at I_F = 2 A and T_J = 25 °C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At higher junction temperatures or continuous DC load, V_F decreases slightly due to negative temperature coefficient, but system design should use the 1.15 V max for worst-case power loss calculation in DBLS201G.

How is moisture sensitivity classified for DBLS201G?

DBLS201G is rated Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and requires no baking prior to reflow soldering. This simplifies SMT manufacturing flow, eliminates moisture-related popcorning risk, and supports just-in-time assembly-critical for high-mix, low-volume production of DBLS201G-based power modules.