Taiwan Semiconductor Corporation DBL107G-T

Overview

DBL107G-T from Taiwan Semiconductor is a 1 A, 1000 V repetitive peak reverse voltage (VRRM) standard quad bridge rectifier in DBL package, with 40 A peak forward surge current (IFSM), 1.1 V max forward voltage per diode at 1 A, and rated for -55°C to +150°C junction temperature - used in high-voltage AC/DC conversion stages of industrial SMPS and lighting ballasts.

For engineers reviewing the DBL107G-T datasheet, DBL107G-T pinout, DBL107G-T application, or DBL107G-T equivalent, key selection criteria include verified VRRM = 1000 V, IFSM = 40 A, thermal resistance RθJL = 15 °C/W, RoHS/halogen-free compliance, and UL recognition E-326854 - all confirmed for this exact ordering variant.

Technical Context

The DBL107G-T integrates four silicon PN-junction diodes in a single-phase full-wave bridge configuration, optimized for high-voltage line rectification where VR(RMS) = 700 V supports 100–240 VAC input with margin. Its molded DBL package enables compact PCB mounting with matte tin-plated leads compliant to J-STD-002 solderability and JESD 201 Class 1A whisker resistance.

Thermal performance is defined by RθJL = 15 °C/W and RθJA = 40 °C/W, enabling 1 A continuous forward current (IF) with appropriate board copper area. Reverse leakage remains ≤2 µA at 25°C and ≤500 µA at 125°C under rated VRRM, supporting stable operation in thermally demanding environments.

Key Specifications

Pinout & Package

Package: DBL - molded plastic case meeting UL 94V-0 flammability rating; 0.360 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 GBU10K-E3/51 and MB10F, the DBL107G-T delivers superior surge robustness (40 A IFSM) in a compact DBL package with best-in-class RθJL = 15 °C/W - making it optimal for thermally dense, high-reliability AC/DC front-ends where both size and surge immunity matter.

Availability

DBL107G-T is available at Aetrix Electronics and suitable for industrial SMPS, LED lighting drivers, universal AC adapters, and appliance power supplies requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for DBL107G-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 since 1979.

The DBL107G-T belongs to TSC's DBL-series standard bridge rectifiers - engineered for cost-sensitive, high-volume AC/DC conversion applications demanding reliability, safety certification, and thermal efficiency in compact packages.

FAQ

What is the peak repetitive reverse voltage (VRRM) rating of the DBL107G-T?

The DBL107G-T has a VRRM rating of 1000 V, as explicitly specified in the Absolute Maximum Ratings table for this exact part number. This value is confirmed across Taiwan Semiconductor's official documentation and distinguishes DBL107G-T from lower-voltage variants like DBL104G-T (400 V) and DBL106G-T (800 V). The 1000 V rating enables safe operation with 700 V RMS input, supporting universal AC mains inputs up to 264 VAC with design margin. This parameter is measured under standard test conditions per JEDEC guidelines.

Does the DBL107G-T have UL recognition, and what is the file number?

Yes, the DBL107G-T is UL Recognized under file number E-326854, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet. This certification applies specifically to the DBL107G-T and its DBL-series siblings, confirming compliance with UL 60950-1 and UL 62368-1 for end-equipment safety. The marking "G" in DBL107G-T also denotes halogen-free, RoHS-compliant green compound, aligned with UL's material requirements. No additional testing is needed for UL-listed systems using this part.

What is the forward voltage (VF) specification for the DBL107G-T, and under what conditions is it measured?

The DBL107G-T has a maximum forward voltage of 1.1 V per diode, measured at IF = 1 A and TJ = 25°C using a 0.3 ms pulse width (per datasheet Note 1). This VF value reflects worst-case conduction loss under nominal load and room-temperature junction conditions. At elevated temperatures or higher currents, VF may increase slightly, but remains within design bounds for typical 1 A SMPS applications. The quad-bridge architecture means total bridge drop is ~2.2 V under full-load DC output conditions.

Is the DBL107G-T suitable for high-surge applications, and what is its IFSM rating?

Yes, the DBL107G-T is designed for high-surge applications with a peak forward surge current (IFSM) rating of 40 A for an 8.3 ms single half-sine waveform, as specified in the Absolute Maximum Ratings table. This exceeds the 30 A rating of DBL106G-T and DBL105G-T, making DBL107G-T the highest-surge variant in the DBL10xG-T family. It reliably handles inrush currents during cold start of bulk capacitors in offline power supplies without degradation, provided thermal design respects RθJL = 15 °C/W.

What package type does the DBL107G-T use, and what are its key mechanical attributes?

The DBL107G-T uses the DBL package - a compact, molded plastic case meeting UL 94V-0 flammability rating. Key mechanical attributes include matte tin-plated leads compliant with J-STD-002 solderability, JESD 201 Class 1A whisker resistance, polarity marking on top surface, and a mass of approximately 0.360 g. The DBL outline is distinct from GBU, KBP, or MB packages, with specific lead pitch and body dimensions documented in the Package Outline Dimensions drawing (Version C2103). No alternate package variants exist for DBL107G-T.