Taiwan Semiconductor Corporation DBLS204G C1G

Overview

DBLS204G from Taiwan Semiconductor is a 2 A, 400 V repetitive peak reverse voltage (VRRM) standard quad bridge rectifier in DBLS surface-mount package, with 50 A peak surge current (IFSM), 1.15 V forward voltage at 2 A/25°C, and rated for -55°C to +150°C junction operation - used in compact AC/DC front-ends of LED drivers and low-power SMPS.

For engineers reviewing the DBLS204G datasheet, DBLS204G pinout, DBLS204G application, or DBLS204G equivalent, key selection criteria include VRRM = 400 V, IF = 2 A, VF ≤ 1.15 V @ 2 A, IFSM = 50 A, and DBLS package thermal resistance RθJA = 40 °C/W for thermal-limited board-level designs.

Technical Context

The DBLS204G integrates four silicon diodes in a single-phase bridge configuration with common-cathode/common-anode topology, enabling full-wave rectification without external interconnects. Its DBLS molded plastic package provides UL 94V-0 flammability rating and matte tin-plated leads compliant with J-STD-002 solderability.

Thermally, it delivers RθJL = 15 °C/W (junction-to-lead) and RθJA = 40 °C/W (junction-to-ambient), supporting conduction-limited operation up to 2 A continuous at TA ≤ 70°C. Reverse leakage remains ≤2 µA at 25°C and ≤500 µA at 125°C under rated VR.

Key Specifications

Pinout & Package

Package: DBLS - surface-mount, 4-terminal molded plastic case (UL 94V-0), 0.360 g 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 GBU4D, the DBLS204G offers superior thermal performance in SMT layouts (RθJA = 40 °C/W vs. ~50 °C/W), avoids through-hole tooling costs, and provides direct drop-in compatibility with other DBLS-series variants for BOM consolidation across voltage grades.

Availability

DBLS204G is available at Aetrix Electronics and suitable for LED drivers, USB-C adapters, and industrial sensor power supplies requiring stable component supply, RoHS/halogen-free compliance, and surface-mount manufacturability.

Supply support for DBLS204G 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 DBLS201G–DBLS209G series was designed specifically for cost-sensitive, high-volume AC/DC conversion in consumer and industrial power supplies - emphasizing robust surge immunity, SMT compatibility, and regulatory compliance without premium pricing.

FAQ

What is the peak repetitive reverse voltage rating for DBLS204G?

The DBLS204G has a repetitive peak reverse voltage (VRRM) rating of 400 V, confirmed in the Absolute Maximum Ratings table on page 1 of the Taiwan Semiconductor datasheet (Version J2103). This value defines the maximum instantaneous reverse voltage each internal diode can block repeatedly without breakdown, making DBLS204G suitable for 280 V RMS AC inputs such as universal mains or 230 VAC systems with safety margin.

Does DBLS204G require moisture sensitivity baking before reflow soldering?

No, DBLS204G does not require pre-reflow baking. It is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and processed directly in standard lead-free reflow profiles without preconditioning. This simplifies SMT line integration and eliminates bake-related yield loss or delamination risk for DBLS204G.

What is the forward voltage drop of DBLS204G at its rated current?

The DBLS204G exhibits a maximum forward voltage (VF) of 1.15 V per diode at IF = 2 A and TJ = 25°C, as specified in the Electrical Specifications table. Since the device is a full-wave bridge, total conduction drop across the conducting pair is approximately 2.3 V at full load - a key parameter for calculating conduction losses and thermal design in DBLS204G-based power supplies.

Is DBLS204G certified for automotive applications?

The base DBLS204G is not AEC-Q101 qualified; however, the pin-compatible variant DBLS204GH (with 'H' suffix) carries AEC-Q101 qualification. The standard DBLS204G meets industrial temperature range (-55°C to +150°C) and UL recognition (File # E-326854), but automotive use requires explicit validation of DBLS204GH or equivalent qualified parts per system-level requirements.

How does the thermal performance of DBLS204G compare to traditional GBU packages?

DBLS204G achieves RθJA = 40 °C/W versus ~50 °C/W for comparable through-hole GBU packages due to optimized surface-mount thermal path and direct PCB copper coupling. This 10 °C/W improvement allows DBLS204G to sustain 2 A continuous current at up to 70°C ambient without forced air - a measurable advantage over GBU4K in space-constrained, fanless applications like LED drivers or smart home hubs.