Taiwan Semiconductor Corporation DBL206G-T

Overview

DBL206G-T from Taiwan Semiconductor is a 2A, 800V standard quad bridge rectifier in DBL package, featuring 50A peak surge current, 1.15V max forward voltage per diode at 2A, and 150°C max junction temperature. It serves as the AC-to-DC front-end rectifier in compact off-line power supplies.

For engineers reviewing the DBL206G-T datasheet, DBL206G-T pinout, DBL206G-T application, or DBL206G-T equivalent, key selection criteria include repetitive peak reverse voltage (800V), thermal resistance (15°C/W junction-to-lead), RoHS/halogen-free compliance, and UL recognition for safety-critical board-level integration.

Technical Context

This device integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals externally accessible. Its DBL molded plastic package supports surface-mount assembly and meets UL 94V-0 flammability rating with matte tin-plated leads compliant to J-STD-002 solderability.

The DBL206G-T operates across –55°C to +150°C junction range, delivers 10.3 A²s fusing I²t rating under 8.3ms half-sine surge, and exhibits ≤2 µA reverse leakage per diode at 25°C - enabling stable performance in high-reliability adapter and lighting applications.

Key Specifications

Pinout & Package

Package: DBL - molded plastic body, 4-pin single-phase bridge rectifier with integrated leadframe; dimensions per TSC DBL outline drawing; UL 94V-0 rated; matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU2K-E3/51 and GBU6K, the DBL206G-T offers superior height-constrained packaging, verified halogen-free compliance, and optimized thermal resistance - making it preferred for next-generation compact, eco-certified power supplies where board space and regulatory alignment are critical.

Availability

DBL206G-T is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C adapters requiring stable component supply, consistent parametric performance, and full regulatory documentation traceability.

Supply support for DBL206G-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, specializing in power rectifiers, TVS diodes, and MOSFETs since 1979.

The DBL series was designed specifically for cost-sensitive, high-volume AC/DC front-end applications demanding UL recognition, RoHS/halogen-free compliance, and robust surge immunity in compact molded packages.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) specified for DBL206G-T?

The DBL206G-T has a VRRM rating of 800 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This value is fixed for the DBL206G-T variant and distinguishes it from DBL204G-T (400 V), DBL205G-T (600 V), and DBL207G-T (1000 V). The 800 V rating ensures safe operation with 220–240 VAC mains inputs including transient overvoltage margins.

Does DBL206G-T meet halogen-free requirements per IEC 61249-2-21?

Yes, DBL206G-T is explicitly marked halogen-free according to IEC 61249-2-21, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. This compliance is verified through material composition testing and applies to the molding compound and internal construction - not just plating or marking. The "G" suffix in DBL206G-T denotes green (halogen-free) compound, distinguishing it from non-G variants.

What is the forward voltage drop (VF) specification for DBL206G-T at rated current?

The DBL206G-T has a maximum forward voltage of 1.15 V per diode at IF = 2 A and TJ = 25°C, as specified in the Electrical Specifications table. This is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At higher junction temperatures (e.g., 125°C), VF decreases slightly, but the 1.15 V max remains the design limit for thermal and efficiency calculations at room-temperature startup conditions.

Is DBL206G-T UL recognized, and what is its file number?

Yes, DBL206G-T is UL Recognized with File # E-326854, as documented in the FEATURES section of the official datasheet. This recognition covers the entire DBL204G-T through DBL207G-T family and validates compliance with UL 60747-4 for semiconductor devices. The rating applies to the DBL package construction, molding compound, and internal die attachment - supporting end-product safety certifications without additional component-level testing.

What is the junction-to-lead thermal resistance (R_θJL) for DBL206G-T, and why does it matter?

The DBL206G-T has a typical junction-to-lead thermal resistance (R_θJL) of 15°C/W, per the Thermal Performance table. This parameter quantifies how effectively heat flows from the silicon junction to the external leads - directly impacting achievable power dissipation on standard PCBs. A lower R_θJL enables higher continuous current capability without heatsinks, especially in designs where leads are soldered to wide copper pours acting as thermal planes.