Taiwan Semiconductor Corporation DBLS103G

Overview

DBLS103G from Taiwan Semiconductor is a 1A, 200V repetitive peak reverse voltage (V_RRM) standard quad bridge rectifier in DBLS surface-mount package, featuring 40A non-repetitive surge current (I_FSM), 1.1V max forward voltage at 1A, and 2µA max reverse leakage at 25°C - used in compact AC/DC front-end stages of LED drivers and low-power adapters.

For engineers reviewing the DBLS103G datasheet, DBLS103G pinout, DBLS103G application, or DBLS103G equivalent, key selection criteria include V_RRM = 200V, I_F = 1A, thermal resistance R_θJA = 40°C/W, AEC-Q101 qualification availability (DBLS103GH), and DBLS package compatibility with automated SMT assembly.

Technical Context

The DBLS103G integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode/common-anode topology. Its DBLS molded plastic package enables PCB-level mounting without heatsinking for ≤1A continuous operation at ambient temperatures up to 75°C.

Thermal performance is defined by R_θJL = 15°C/W (junction-to-lead) and R_θJA = 40°C/W (junction-to-ambient), supporting reliable conduction under transient surges up to 40A (8.3ms half-sine). Reverse recovery is not specified; device operates as a standard recovery rectifier.

Key Specifications

Pinout & Package

DBLS103G uses the DBLS surface-mount package: 4-pin, single-row gull-wing leadframe with 2.3mm pitch, UL 94V-0 rated molding compound, matte tin-plated leads compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4K and MB10F, the DBLS103G offers optimal balance of 200V rating, 1A capacity, and compact DBLS SMT footprint - ideal for space-constrained 120VAC consumer power supplies where higher voltage or current headroom is unnecessary.

Availability

DBLS103G is available at Aetrix Electronics and suitable for LED lighting drivers, USB wall adapters, and industrial sensor power supplies requiring stable component supply and consistent DBLS package delivery.

Supply support for DBLS103G 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 industrial, computing, and consumer markets since 1979.

The DBLS101G–DBLS107G family targets cost-sensitive, high-volume AC/DC conversion applications where reliability, SMT compatibility, and regulatory compliance (UL, AEC-Q101, RoHS) are essential design requirements.

FAQ

What is the peak repetitive reverse voltage rating for DBLS103G?

The DBLS103G has a repetitive peak reverse voltage (V_RRM) rating of 200 V, verified per Taiwan Semiconductor's P2103 datasheet. This value defines the maximum instantaneous reverse voltage each diode in the bridge can block during normal operation. It is selected specifically for 120VAC applications with adequate safety margin and is distinct from the 100V (DBLS102G) and 400V (DBLS104G) variants in the same DBLS family.

Does DBLS103G have AEC-Q101 qualification?

The DBLS103G itself is not AEC-Q101 qualified; however, the pin-compatible DBLS103GH variant is explicitly listed as AEC-Q101 qualified in the ordering information. The "H" suffix denotes automotive-grade screening and testing. For automotive applications requiring AEC-Q101 compliance, DBLS103GH must be specified - DBLS103G is intended for industrial and consumer use only.

What is the forward voltage drop of DBLS103G at rated current?

The DBLS103G exhibits a maximum forward voltage (V_F) of 1.1 V per diode at I_F = 1 A and T_J = 25°C, resulting in ~2.2 V total drop across the conducting path. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss. At elevated junction temperatures, V_F decreases slightly, but system-level thermal design must ensure T_J remains within the -55°C to +150°C operating range.

Can DBLS103G replace DBLS102G or DBLS104G in an existing design?

DBLS103G is not a direct replacement for DBLS102G (100V) or DBLS104G (400V) without circuit review. While all share identical DBLS package, pinout, and thermal specs, their V_RRM ratings differ significantly. Substituting DBLS103G for DBLS102G in a 100V-design may over-specify margin unnecessarily; using it in place of DBLS104G in a 400V system risks reverse breakdown. Voltage rating must match application stress conditions.

What is the moisture sensitivity level (MSL) for DBLS103G?

The DBLS103G has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not humidity-sensitive and requires no baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates floor-life tracking. The DBLS package's molded plastic construction and matte tin plating contribute to this robust MSL rating, supporting standard SMT assembly without special handling.