Taiwan Semiconductor Corporation DBL101G

Overview

DBL101G from Taiwan Semiconductor is a 1 A, 50 V repetitive peak reverse voltage (V_RRM) standard quad bridge rectifier in DBL package, featuring 40 A peak forward surge current (I_FSM), 1.1 V max forward voltage per diode at 1 A, and UL Recognized File # E-326854 compliance. It serves as AC-to-DC conversion core in compact offline power supplies.

For engineers reviewing the DBL101G datasheet, DBL101G pinout, DBL101G application, or DBL101G equivalent, key selection factors include its 50 V V_RRM, 40 A I_FSM, 15 °C/W junction-to-lead thermal resistance, RoHS/halogen-free status, and AEC-Q101 qualification availability (DBL101GH variant).

Technical Context

The DBL101G integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals, enabling direct AC input rectification without external interconnection. Its molded DBL package supports PCB mounting with matte tin-plated leads compliant to J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Thermally, it delivers R_θJL = 15 °C/W and R_θJA = 40 °C/W, allowing 1 A continuous forward current at up to +125 °C ambient when properly heatsinked. Reverse leakage remains ≤2 µA at 25 °C and ≤500 µA at 125 °C under rated V_R.

Key Specifications

Pinout & Package

DBL101G uses the DBL surface-mount package (4.8 × 4.2 × 2.7 mm), molded in UL 94V-0 plastic with matte tin-plated leads. Polarity is marked on top surface per standard bridge orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4A, DBL101G saves >60% PCB area and improves thermal coupling via lower R_θJL; versus MB10F, DBL101G reduces unnecessary reverse voltage overhead, lowering cost and improving efficiency in 50 V-rated systems.

Availability

DBL101G is available at Aetrix Electronics and suitable for switching mode power supplies, USB adapters, LED lighting drivers, and industrial sensor power modules requiring stable component supply and long-lifecycle support.

Supply support for DBL101G 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 Taiwanese manufacturer specializing in discrete power semiconductors, including rectifiers, TVS diodes, and MOSFETs, with ISO/TS 16949 and ISO 14001 certifications.

The DBL series was designed specifically for high-density, cost-sensitive AC/DC front-end rectification in consumer, industrial, and automotive auxiliary power supplies - emphasizing small footprint, high surge robustness, and regulatory compliance.

FAQ

What is the maximum junction temperature rating for DBL101G?

The DBL101G has a maximum junction temperature (T_J) rating of +150 °C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet R2103. This allows sustained operation in thermally demanding environments such as enclosed LED drivers or industrial control boards. Derating curves confirm 1 A I_F is maintainable up to +125 °C ambient with adequate PCB copper thermal relief. DBL101G must not exceed this limit to ensure long-term reliability and parametric stability.

Is DBL101G pin-compatible with other DBL-series bridge rectifiers like DBL102G or DBL103G?

Yes, all DBL101G through DBL107G share identical DBL package dimensions, lead pitch, and pinout configuration - only V_RRM and related parameters differ. The marking code "DBL101G" explicitly denotes the 50 V version, while mechanical and soldering interfaces remain fully interchangeable. This enables single PCB design reuse across multiple input voltage classes, provided layout clearance and thermal design accommodate the highest V_RRM variant deployed.

Does DBL101G meet automotive qualification standards?

The base DBL101G is not AEC-Q101 qualified, but the DBL101GH variant - indicated by the "H" suffix in the ordering code - is fully AEC-Q101 qualified per Taiwan Semiconductor's R2103 documentation. DBL101GH undergoes extended stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. For automotive body electronics or infotainment power supplies, specify DBL101GH to meet OEM component-level reliability requirements.

What is the forward voltage specification for DBL101G and how is it measured?

DBL101G specifies a maximum forward voltage (V_F) of 1.1 V per diode at I_F = 1 A and T_J = 25 °C, measured using pulse test conditions (PW = 0.3 ms) to avoid self-heating. This value reflects worst-case conduction loss across the internal diode pair during positive half-cycles. At elevated junction temperatures (e.g., 125 °C), V_F decreases slightly, but system-level thermal design must still target <1.1 V to meet efficiency targets in 1 A continuous applications.

How does the DBL101G package compare to industry-standard bridge packages like KBP or GBU?

The DBL package (4.8 × 4.2 × 2.7 mm) is significantly smaller than KBP (13.5 × 11.2 mm) and GBU (10.1 × 10.1 mm) packages, reducing PCB area by >65%. Its molded plastic construction meets UL 94V-0, and matte tin leads comply with J-STD-002. Unlike larger packages, DBL relies on PCB copper for thermal dissipation (R_θJL = 15 °C/W), making it ideal for space-constrained, thermally managed SMPS layouts where DBL101G replaces bulkier alternatives without sacrificing surge capability.