Diodes Incorporated SBR20U100CT-G

Overview

SBR20U100CT-G from Diodes Incorporated is a 20A dual common-cathode Super Barrier Rectifier in TO-220AB package, rated for 100V peak repetitive reverse voltage, with typical forward voltage of 0.63V at 20A/25°C and thermal resistance of 2°C/W junction-to-case. It delivers soft, fast switching and high-temperature stability for DC-DC output rectification in industrial power supplies.

For engineers reviewing the SBR20U100CT-G datasheet, SBR20U100CT-G pinout, SBR20U100CT-G application, or SBR20U100CT-G equivalent, key selection criteria include forward voltage drop at full load, surge current capability (200A IFSM), thermal performance under continuous conduction mode, and RoHS-compliant lead-free construction.

Technical Context

This dual-diode rectifier integrates two independent SBR® die in a single TO-220AB thermally optimized package with common cathode configuration, enabling synchronous-like efficiency without gate drive complexity. Its patented super barrier structure replaces traditional PN junctions with low-resistance metal-semiconductor interfaces to reduce VF while maintaining low leakage.

The device operates across –65°C to +175°C junction temperature range and sustains 140mJ non-repetitive avalanche energy at 5A/8.5mH, supporting robust transient handling in unregulated or wide-input-range converters.

Key Specifications

Pinout & Package

Package: TO-220AB - Three-terminal through-hole plastic package with isolated tab (electrically connected to cathode), rated for 2000V isolation when mounted with insulating hardware (ITO variant only). Tab serves as thermal path and common cathode terminal.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, low-VF rectifier applications.

Compared with STPS20H100CG and VB20100C-E3/4W, SBR20U100CT-G offers superior forward voltage at full load, integrated common-cathode topology for compact dual-rail designs, and guaranteed halogen-free construction-making it optimal for space-constrained, thermally demanding, and environmentally regulated power systems.

Availability

SBR20U100CT-G is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, telecom DC-DC bricks, and automotive on-board charger auxiliary supplies requiring stable component supply and long-term lifecycle support.

Supply support for SBR20U100CT-G 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The SBR® Super Barrier Rectifier product line targets high-efficiency power conversion in computing, industrial, and telecom infrastructure, emphasizing low forward voltage, thermal robustness, and environmental compliance without sacrificing surge capability.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The SBR20U100CT-G has a specified operating junction temperature range of –65°C to +175°C. For reliable continuous operation, junction temperature must remain below 175°C under worst-case conditions-including ambient temperature, power dissipation, and heatsink thermal resistance. Derating curves in Figure 4 confirm 10A per leg is sustainable at 100°C ambient with proper heatsinking.

Is the TO-220AB tab electrically isolated in this part?

No-the TO-220AB package used in SBR20U100CT-G has a non-isolated tab that is internally connected to the common cathode terminal. Electrical isolation requires external insulating hardware (e.g., mica washer and shoulder washer) or selection of the ITO-220AB variant (SBR20U100CTFP-G), which features a fully isolated tab rated for 2000V AC.

How does the SBR® technology differ from standard Schottky rectifiers?

SBR® uses a proprietary barrier engineering process that combines metal-semiconductor contact with optimized epitaxial layer doping to achieve lower forward voltage than conventional Schottky diodes at high current densities-while maintaining significantly lower reverse leakage at elevated temperatures. Unlike Schottky devices, SBRs retain stable VF up to 125°C and exhibit softer reverse recovery characteristics.

Can SBR20U100CT-G replace standard 20A bridge rectifiers in single-phase applications?

No-it is a dual common-cathode discrete rectifier, not a full bridge. It can replace one half of a bridge (e.g., two series-connected diodes in a center-tapped transformer configuration) or serve as dual-output rectifier, but cannot substitute for a 4-diode bridge without circuit redesign. For bridge replacement, consider Diodes Inc.'s GBU20K or similar integrated bridge packages.