Taiwan Semiconductor Corporation DBL202G

Overview

DBL202G from Taiwan Semiconductor is a 2A, 100V repetitive peak reverse voltage (VRRM) standard quad bridge rectifier in DBL package, with 50A peak forward surge current (IFSM), 1.15V max forward voltage at 2A/25°C, and AEC-Q101 qualification available. It serves as AC-to-DC conversion core in compact off-line power supplies.

For engineers reviewing the DBL202G datasheet, DBL202G pinout, DBL202G application, or DBL202G equivalent, key selection factors include VRRM margin for 100V-rated input stages, thermal resistance (RθJL = 15°C/W), surge robustness (IFSM = 50A), and RoHS/halogen-free compliance for automotive and lighting designs.

Technical Context

The DBL202G integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling direct AC line rectification without external interconnection. Its molded DBL package provides UL 94V-0 flammability rating and matte tin-plated leads compliant with J-STD-002 solderability.

Thermally, it supports continuous operation up to TJ = 150°C with junction-to-lead resistance of 15°C/W, and exhibits IR ≤ 2 µA at 25°C and ≤ 500 µA at 125°C under rated reverse voltage, ensuring low leakage in high-temperature adapter and SMPS environments.

Key Specifications

Pinout & Package

Package: DBL - Molded plastic case, UL 94V-0 rated, 0.380 g weight, matte tin-plated leads, 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 GBU2K and MB2S, the DBL202G delivers superior surge robustness (50 A IFSM) and better thermal coupling (RθJL = 15°C/W), making it optimal for cost-sensitive, high-reliability 100 VAC-input power supplies where board space and thermal management are tightly constrained.

Availability

DBL202G is available at Aetrix Electronics and suitable for switching mode power supplies, USB wall adapters, and LED lighting applications requiring stable component supply, consistent lead-time visibility, and long-term lifecycle support.

Supply support for DBL202G 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, automotive, and industrial markets since 1979.

The DBL series was developed specifically for high-efficiency, low-cost AC/DC front-end rectification in compact consumer and industrial power supplies, emphasizing reliability, regulatory compliance, and manufacturability in high-volume PCB assembly.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) rating for DBL202G?

The DBL202G has a VRRM rating of 100 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version K2103). This value defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown, and is selected to provide safe margin above 70 Vrms AC input (e.g., 100 VAC nominal systems). The DBL202G must not be used in circuits where peak reverse voltage exceeds 100 V.

Is DBL202G suitable for automotive applications?

Yes - the DBL202G is offered in an AEC-Q101 qualified variant designated DBL202GH. This version undergoes rigorous stress testing per AEC-Q101 including temperature cycling, high-temperature reverse bias, and electrostatic discharge. Standard DBL202G (non-H suffix) is not AEC-Q101 qualified; only DBL202GH meets automotive reliability requirements. Both share identical electrical specs and DBL package.

What is the forward voltage drop (VF) specification for DBL202G at rated current?

The DBL202G has a maximum forward voltage of 1.15 V per diode at IF = 2 A and TJ = 25°C, as specified in the Electrical Specifications table. Since it is a full-wave bridge, total conduction drop across the conducting path is approximately 2 × VF = 2.3 V. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating during test.

Does DBL202G have halogen-free and RoHS-compliant construction?

Yes - the DBL202G uses halogen-free molding compound per IEC 61249-2-21 and is fully RoHS compliant (Pb-free, Cd-free, Hg-free, Cr⁶⁺-free, PBB/PBDE-free). These attributes are explicitly stated in the Features section of the Taiwan Semiconductor datasheet and verified via material declarations. The "G" suffix in DBL202G denotes green (halogen-free) compound.

What is the thermal resistance from junction to lead (RθJL) for DBL202G?

The DBL202G has a typical junction-to-lead thermal resistance (RθJL) of 15°C/W, as published in the Thermal Performance section of the datasheet. This parameter reflects heat transfer efficiency from the silicon die to the external lead frame, and is critical for estimating temperature rise under load when mounted on PCBs with limited copper area. It is measured under standardized low-airflow conditions.