Taiwan Semiconductor Corporation DBLS204G-T

Overview

DBLS204G-T from Taiwan Semiconductor is a 2 A, 400 V standard quad bridge rectifier in DBLS package, featuring 50 A peak surge current, 1.15 V max forward voltage per diode at 2 A, and 2 µA max reverse leakage at 25°C. It is designed for compact AC/DC conversion in space-constrained power adapters.

For engineers reviewing the DBLS204G-T datasheet, DBLS204G-T pinout, DBLS204G-T application, or DBLS204G-T equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (R_θJL = 15 °C/W), RoHS/halogen-free compliance, and UL recognition (E-326854) - all critical for industrial adapter and lighting designs requiring reliability and regulatory alignment.

Technical Context

This quad-configuration bridge integrates four silicon diodes in a single molded DBLS package with matte tin-plated leads. Its 150 °C maximum junction temperature and JESD201 Class 1A whisker resistance support continuous operation in thermally demanding SMPS environments.

The device delivers stable rectification under transient surges up to 50 A (8.3 ms half-sine), with I²t rating of 10.37 A²s and R_θJA = 40 °C/W, enabling board-level thermal management without forced cooling in low-to-medium power applications.

Key Specifications

Pinout & Package

Package: DBLS - surface-mount, 4-terminal molded plastic case (UL 94V-0), 0.360 g weight, matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 1A whisker testing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU2K-E3/51, DBLS204G-T offers superior thermal efficiency and SMT compatibility; versus GBU2J, it trades slightly higher IR at 125°C for UL recognition and lower cost in volume production - making it optimal for certified, cost-sensitive adapter designs.

Availability

DBLS204G-T is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting applications requiring stable component supply, consistent parametric performance, and full regulatory documentation including UL file and RoHS certificates.

Supply support for DBLS204G-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, automotive, and industrial markets since 1979.

The DBLS series was developed specifically for high-reliability, low-cost AC/DC front-end rectification in compact consumer and industrial power supplies - emphasizing thermal robustness, regulatory compliance, and manufacturability in high-volume SMT lines.

FAQ

What is the maximum junction temperature rating for DBLS204G-T?

The DBLS204G-T has a maximum junction temperature (T_J) of +150°C, validated across its full operating range from –55°C to +150°C. This rating enables reliable operation in enclosed power adapters and industrial control modules where ambient temperatures exceed 70°C. The device's R_θJL of 15 °C/W further supports thermal management without external heatsinking in typical 2 A applications.

Is DBLS204G-T compatible with lead-free reflow processes?

Yes, DBLS204G-T is fully compatible with lead-free reflow soldering per J-STD-002. Its matte tin-plated leads meet solderability requirements, and its moisture sensitivity level is rated Class 1 (J-STD-020), meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. No special handling or preconditioning is required.

Does DBLS204G-T have UL recognition, and what is the file number?

Yes, DBLS204G-T is UL Recognized under file number E-326854. This certification confirms compliance with UL 60950-1 and UL 62368-1 for use in information technology and audio/video equipment. The UL mark applies specifically to the DBLS204G-T variant and supports end-product safety approvals without additional component-level testing.

What is the forward voltage specification for DBLS204G-T at rated current?

The DBLS204G-T has a maximum forward voltage (V_F) of 1.15 V per diode at I_F = 2 A and T_J = 25°C, measured under pulse conditions (PW = 0.3 ms). This value reflects worst-case conduction loss across the bridge, resulting in ≤4.6 W total dissipation at full load - a key parameter for thermal design in sealed adapter enclosures.

Can DBLS204G-T be used as a direct replacement for DBLS204G (without -T suffix)?

Yes, DBLS204G-T is the tape-and-reel packaging variant of DBLS204G, sharing identical electrical, thermal, and mechanical specifications. The "-T" suffix denotes 1,500-unit tape-and-reel packaging per ordering code DBLS2xG-T; the bare die, metallization, marking, and performance are functionally identical to the non-T version.