Taiwan Semiconductor Corporation DBL105G-T

Overview

DBL105G-T from Taiwan Semiconductor is a 1A, 600V standard quad bridge rectifier in DBL package, featuring 40A peak surge current (IFSM), 1.1V max forward voltage per diode at 1A, and 2µA max reverse leakage at 25°C. It is used in AC/DC front-end rectification for compact switching mode power supplies.

For engineers reviewing the DBL105G-T datasheet, DBL105G-T pinout, DBL105G-T application, or DBL105G-T equivalent, key selection criteria include repetitive peak reverse voltage (600V), thermal resistance (RθJL = 15°C/W), junction temperature range (–55°C to +150°C), and UL recognition (E-326854).

Technical Context

The DBL105G-T integrates four silicon diodes in a single-phase bridge configuration with common-cathode and common-anode terminals externally accessible. Its molded DBL package enables surface-mount compatibility while maintaining mechanical robustness per JESD201 Class 1A whisker testing and UL 94V-0 flammability rating.

Designed for high-reliability AC input rectification, it supports continuous 1A average forward current with derating above 75°C ambient and withstands non-repetitive 40A surge currents (8.3ms half-sine) without fusing-validated by I²t = 6.64 A²s rating.

Key Specifications

Pinout & Package

Package: DBL - Molded plastic, single-phase bridge rectifier housing with 4 leads (AC1, AC2, +, –), UL 94V-0 rated, matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 1A whisker testing. Weight: 0.360 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU6K-E3/54 and GBU6J, the DBL105G-T offers superior thermal performance in SMT layouts (RθJL = 15°C/W), tighter reverse leakage (≤2µA), and smaller DBL footprint-making it optimal for modern compact, high-efficiency AC/DC converters where PCB area and thermal headroom are constrained.

Availability

DBL105G-T is available at Aetrix Electronics and suitable for switching mode power supplies, USB wall adapters, and industrial control power modules requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for DBL105G-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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified products.

The DBL104G-T to DBL107G-T series was developed for cost-sensitive, high-volume AC/DC front-end applications demanding reliability, safety certification, and RoHS/halogen-free compliance in consumer and industrial power supplies.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for DBL105G-T?

The DBL105G-T has a VRRM rating of 600 V, meaning it can block up to 600 volts of reverse voltage repeatedly without breakdown. This value is specified in the Absolute Maximum Ratings table and distinguishes DBL105G-T from DBL104G-T (400 V), DBL106G-T (800 V), and DBL107G-T (1000 V). The 600 V rating makes DBL105G-T suitable for universal-input (90–264 VAC) power supplies with adequate safety margin.

Is DBL105G-T compatible with lead-free reflow soldering processes?

Yes, DBL105G-T features matte tin-plated leads that are fully compliant with J-STD-002 solderability requirements and qualified for lead-free reflow profiles (peak temperature up to 260°C). The DBL package's UL 94V-0 molding compound also withstands standard JEDEC moisture sensitivity level (MSL) handling, and the device is rated for reflow per IPC/JEDEC J-STD-020.

Does DBL105G-T have UL recognition, and what is the file number?

Yes, DBL105G-T is UL Recognized under File #E-326854. This certification applies to the entire DBL104G-T to DBL107G-T family and confirms compliance with UL 60747-4 for semiconductor devices. The recognition covers construction, flammability (UL 94V-0), and electrical safety-enabling faster end-product safety certification for designers using DBL105G-T in North American markets.

What is the junction-to-lead thermal resistance (RθJL) of DBL105G-T, and why does it matter?

The DBL105G-T has a typical RθJL of 15°C/W, measured from junction to lead. This low value enables efficient heat conduction from the silicon die directly into the PCB copper via the leads-critical for thermal management in compact SMT designs where heatsinks are impractical. A lower RθJL means less temperature rise at a given power dissipation, improving long-term reliability and allowing higher ambient operating temperatures.

Can DBL105G-T replace DBL104G-T in an existing design?

DBL105G-T can replace DBL104G-T only if the circuit's peak reverse voltage requirement is ≤600 V and the higher VRRM does not introduce unintended stress elsewhere (e.g., in snubber networks). Both share identical package, pinout, IF, IFSM, and thermal specs-but DBL105G-T's higher blocking voltage may slightly increase reverse recovery time. Verify reverse recovery behavior and ensure no overvoltage risk exists on downstream components before substitution.