Taiwan Semiconductor Corporation DBLS156G-T

Overview

DBLS156G-T from Taiwan Semiconductor is a 1.5A, 800V rated standard quad bridge rectifier in DBLS surface-mount package, featuring 50A peak surge current, 1.1V max forward voltage per diode at 1.5A, and 2µA max reverse leakage at 25°C - used in AC/DC front-end stages of compact switching mode power supplies.

For engineers reviewing the DBLS156G-T datasheet, DBLS156G-T pinout, DBLS156G-T application, or DBLS156G-T equivalent, key selection criteria include VRRM=800V, IFSM=50A, thermal resistance RθJA=40°C/W, RoHS/halogen-free compliance, and DBLS package footprint compatibility with high-density PCB layouts.

Technical Context

The DBLS156G-T integrates four silicon junction diodes in a single-phase full-wave bridge configuration, enabling direct AC-to-DC conversion without external interconnection. Its DBLS molded plastic package supports reflow soldering per J-STD-002 and meets UL 94V-0 flammability rating.

Thermal performance is defined by RθJL=15°C/W (junction-to-lead) and RθJA=40°C/W (junction-to-ambient), with maximum junction temperature of +150°C and storage range from –55°C to +150°C. Reverse leakage rises to 500µA at 125°C, confirming stable operation under elevated ambient conditions.

Key Specifications

Pinout & Package

Package: DBLS - Surface-mount, 4-terminal molded plastic case with matte tin-plated leads; dimensions per Taiwan Semiconductor outline drawing (Version E2103); UL Recognized File #E-326854; moisture sensitivity level 1 (J-STD-002).

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU6K and MB10F, the DBLS156G-T uniquely balances SMT compatibility, 800V/1.5A rating, halogen-free compliance, and MSL Level 1 handling - making it optimal for high-volume, space-constrained, and environmentally regulated AC/DC converters.

Availability

DBLS156G-T is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C power adapters requiring stable component supply, consistent parametric performance, and full regulatory compliance across production batches.

Supply support for DBLS156G-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, serving global power, industrial, and consumer markets since 1979.

The DBLS series was developed specifically for high-reliability, surface-mount AC/DC front-end rectification in compact, thermally constrained power supplies - emphasizing manufacturability, safety certification readiness, and environmental compliance.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for DBLS156G-T?

The DBLS156G-T has a VRRM of 800 V, meaning it can safely block up to 800 volts of repetitive reverse voltage across each internal diode. This rating corresponds to an AC input RMS voltage limit of approximately 560 V, providing sufficient margin for universal-input (90–264 VAC) applications. The value is confirmed in the Absolute Maximum Ratings table on page 2 of Taiwan Semiconductor's DBLS154G-T–DBLS157G-T datasheet (Version E2103).

Is DBLS156G-T compatible with lead-free reflow soldering processes?

Yes, DBLS156G-T is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the DBLS package is rated for peak reflow temperatures up to 260°C. With Moisture Sensitivity Level 1 per J-STD-020, no pre-bake is required prior to assembly - simplifying manufacturing flow and reducing risk of popcorning.

What is the forward voltage drop (VF) specification for DBLS156G-T at rated current?

The DBLS156G-T specifies a maximum forward voltage of 1.1 V per diode at IF = 1.5 A and TJ = 25°C, measured under pulsed conditions (PW = 0.3 ms). This VF value directly determines conduction loss in the bridge - at full load, total bridge drop is ~2.2 V, resulting in ~3.3 W of dissipation. Designers must account for this in thermal layout, especially given RθJA = 40°C/W.

Does DBLS156G-T have UL recognition, and what is the file number?

Yes, DBLS156G-T is UL Recognized with File #E-326854. This certification applies to the entire DBLS154G-T through DBLS157G-T family and confirms compliance with UL 60950-1 and UL 62368-1 for use in information technology and audio/video equipment. The recognition covers flammability (UL 94V-0), electrical insulation, and construction integrity.

How does the thermal performance of DBLS156G-T compare to similar SMD bridge rectifiers?

DBLS156G-T offers RθJA = 40°C/W and RθJL = 15°C/W - competitive among SMD bridge rectifiers in its class. For example, competing DBLS-style devices often range from 45–60°C/W RθJA. The lower RθJL enables effective heat transfer to the PCB copper pour or metal-core substrate, supporting higher ambient operation up to +150°C junction temperature without forced cooling.