Taiwan Semiconductor Corporation DBL104G-T

Overview

DBL104G-T from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage (V_RRM) standard quad bridge rectifier in DBL package, featuring 40 A non-repetitive peak forward surge current (I_FSM), 1.1 V max forward voltage per diode at 1 A, and 2 µA max reverse current at 25°C - used in compact AC/DC front-end stages of low-power SMPS and LED drivers.

For engineers reviewing the DBL104G-T datasheet, DBL104G-T pinout, DBL104G-T application, or DBL104G-T equivalent, key selection criteria include verified V_RRM = 400 V, I_F = 1 A continuous rating, DBL surface-mount package footprint, thermal resistance R_θJA = 40 °C/W, and UL recognition (E-326854) for safety-compliant power conversion designs.

Technical Context

The DBL104G-T integrates four silicon junction diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals externally accessible. Its DBL molded plastic package supports automated PCB assembly and provides UL 94V-0 flammability compliance.

Thermal performance is defined by R_θJL = 15 °C/W (junction-to-lead) and R_θJA = 40 °C/W (junction-to-ambient), enabling operation up to T_J = 150 °C. Reverse leakage remains ≤500 µA at 125°C, supporting stable performance in thermally constrained environments.

Key Specifications

Pinout & Package

Package: DBL - surface-mount, 4-terminal molded plastic case with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker testing. Dimensions per Taiwan Semiconductor Package Outline Drawing DBL.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4K, DBL104G-T offers superior space efficiency and automated assembly compatibility, while GBU4D fails basic voltage rating alignment - making DBL104G-T the only validated 400 V, 1 A SMT bridge in this comparison for modern low-profile power supplies.

Availability

DBL104G-T is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB wall adapters requiring stable component supply, RoHS compliance, and UL-recognized safety certification.

Supply support for DBL104G-T 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, specializing in rectifiers, TVS diodes, MOSFETs, and power management devices.

The DBL series was designed specifically for cost-sensitive, high-volume AC/DC front-end applications where surface-mount integration, thermal reliability, and regulatory compliance are critical - targeting lighting, adapter, and industrial sensor markets.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for DBL104G-T?

The DBL104G-T has a V_RRM rating of 400 V, confirmed in the Absolute Maximum Ratings table on page 1 of the Taiwan Semiconductor datasheet (Version C2103). This value defines the highest instantaneous reverse voltage each diode can block repeatedly without breakdown, making DBL104G-T suitable for 230 VAC mains-derived inputs after derating per IEC 61000-3-2.

Is DBL104G-T compatible with lead-free reflow soldering processes?

Yes, DBL104G-T features matte tin-plated leads qualified per J-STD-002 for solderability and meets JEDEC JESD201 Class 1A whisker testing. Its DBL package is rated for peak reflow temperatures up to 260°C, fully supporting standard lead-free (Pb-free) PCB assembly without metallurgical degradation or solder joint reliability issues.

Does DBL104G-T have UL recognition, and what is the file number?

Yes, DBL104G-T is UL Recognized under File # E-326854, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet. This recognition covers the device's construction, flammability (UL 94V-0), and electrical safety performance - enabling faster end-product certification for North American markets.

What is the forward voltage (V_F) specification for DBL104G-T at rated current?

DBL104G-T specifies a maximum forward voltage of 1.1 V per diode at I_F = 1 A and T_J = 25°C, per the Electrical Specifications table. Since the device contains four diodes in bridge configuration, total conduction drop across the conducting pair is approximately 2.2 V under those conditions - a key parameter for calculating conduction losses in power budget analysis.

Can DBL104G-T replace DBL105G-T in a design?

No - DBL104G-T (V_RRM = 400 V) is not a drop-in replacement for DBL105G-T (V_RRM = 600 V). While both share identical package, pinout, and thermal specs, substituting DBL104G-T in a 600 V-rated circuit risks premature reverse breakdown under transient overvoltage or high-line conditions. Always match V_RRM to system-level stress requirements.