Taiwan Semiconductor Corporation MBRF20100

Overview

MBRF20100 from Taiwan Semiconductor is a 20A, 100V Schottky barrier rectifier in ITO-220AC package, optimized for high-efficiency DC/DC conversion and SMPS output stages with low forward voltage (0.95 V at 20 A, 25°C) and high surge capability (150 A). It operates up to 150°C junction temperature and features guard ring over-voltage protection.

For engineers reviewing the MBRF20100 datasheet, MBRF20100 pinout, MBRF20100 application, or MBRF20100 equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, 0.95 V forward drop at rated current, 150 A non-repetitive surge rating, thermal resistance of 3°C/W (junction-to-case), and AEC-Q101 qualification option (MBRF20100H).

Technical Context

This single-die Schottky rectifier uses platinum-silicide or similar barrier technology to achieve low VF and fast switching with no minority-carrier recovery. Its 100 V VRRM rating targets mid-to-high voltage secondary-side rectification where silicon diodes would incur excessive conduction loss.

The ITO-220AC package provides direct metal tab thermal path to heatsink, enabling 20 A continuous operation with proper mounting torque (≤0.56 N·m) and compliant with UL 94V-0 and JESD201 Class 2 whisker requirements.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with electrically isolated metal tab, matte tin-plated leads, UL 94V-0 molding compound, and polarity marking per device top-side silkscreen.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH10-M3, MBRF20100 offers AEC-Q101 qualification and guard ring protection at slightly higher VF; compared with MBR20100CT, it provides simpler single-diode routing and superior thermal interface via isolated tab, but lacks dual functionality.

Availability

MBRF20100 is available at Aetrix Electronics and suitable for switching mode power supplies, laptop adapters, and industrial DC/DC converters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MBRF20100 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.

The MBRF20100 belongs to TSC's high-current Schottky rectifier product line, engineered for high-efficiency secondary-side rectification in compact, thermally constrained power systems where low VF and rugged surge capability are critical.

FAQ

What is the maximum junction temperature rating for the MBRF20100?

The MBRF20100 has a maximum junction temperature (TJ max) of 150°C. This rating allows operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations when paired with appropriate heatsinking. Derating curves in the datasheet define safe current limits above 75°C case temperature. Thermal design must ensure MBRF20100 junction temperature remains below 150°C under worst-case load and ambient conditions.

Does the MBRF20100 have AEC-Q101 qualification?

The standard MBRF20100 is not AEC-Q101 qualified; however, the MBRF20100H variant is explicitly qualified per AEC-Q101. The "H" suffix denotes automotive-grade screening and testing including temperature cycling, high-temperature reverse bias, and ESD. For automotive infotainment or body control modules, MBRF20100H must be specified-standard MBRF20100 should only be used in commercial or industrial applications.

What is the forward voltage drop of the MBRF20100 at full rated current?

The MBRF20100 exhibits a typical forward voltage (VF) of 0.95 V at 20 A and 25°C junction temperature. At elevated temperature (125°C), VF drops to 0.87 V due to Schottky barrier physics. This low VF directly reduces conduction losses-e.g., 19 W vs. ~30 W for a silicon diode-making MBRF20100 especially valuable in high-efficiency power supplies where thermal management is constrained.

How is thermal management handled for the MBRF20100 in the ITO-220AC package?

The MBRF20100 uses an ITO-220AC package with an electrically isolated metal tab that serves as both cathode and primary thermal path. Its junction-to-case thermal resistance (RθJC) is 3°C/W. Effective thermal management requires mounting the tab to a heatsink using ≤0.56 N·m torque, electrically insulating hardware (e.g., mica washer), and thermal interface material. Case temperature must be monitored to ensure MBRF20100 stays within derated current limits per the datasheet curve.

What is the reverse leakage current specification for the MBRF20100 at rated voltage?

The MBRF20100 specifies a maximum reverse leakage current (IR) of 100 µA at 100 V and 25°C junction temperature. At 125°C, IR rises to 5 mA. This low room-temperature leakage supports energy-efficient standby modes in adapters and power supplies, while the elevated-temperature value remains well-controlled versus alternatives-critical for maintaining regulation accuracy and minimizing quiescent loss in always-on circuits.