Taiwan Semiconductor Corporation MBRF1645

Overview

MBRF1645 from Taiwan Semiconductor is a 16A, 45V Schottky barrier rectifier in ITO-220AC package, featuring low forward voltage (0.63 V at 16 A, 25°C), high surge current capability (150 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in high-efficiency DC/DC converters and industrial SMPS where low conduction loss and thermal robustness are critical.

For engineers reviewing the MBRF1645 datasheet, MBRF1645 pinout, MBRF1645 application, or MBRF1645 equivalent, key selection factors include its 45 V repetitive peak reverse voltage, 3 °C/W junction-to-case thermal resistance, 150°C maximum junction temperature, and compatibility with lead-free reflow soldering per J-STD-002.

Technical Context

The MBRF1645 uses a single-die Schottky structure optimized for low VF and fast switching, enabling high-frequency operation without minority-carrier recovery losses. Its guard ring design enhances ruggedness against transient overvoltage events, and the ITO-220AC case provides direct heatsink mounting with 0.56 N·m max torque specification.

Thermally, it delivers 3 °C/W R_θJC, supporting continuous 16 A conduction up to 125°C case temperature when properly heatsinked. Reverse leakage remains ≤500 µA at 25°C and ≤15 mA at 125°C under rated 45 V reverse bias - critical for standby power integrity in energy-efficient adapters.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-MBR1645CT and MBR1645CT, the MBRF1645 offers superior thermal performance (3 °C/W), extended 150°C junction rating, and UL recognition - making it preferred for industrial and automotive designs demanding long-term reliability under thermal stress.

Availability

MBRF1645 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and industrial adapters requiring stable component supply with consistent parametric performance across production lots.

Supply support for MBRF1645 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 industrial, computing, and automotive markets since 1979.

The MBRF1645 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, thermally demanding secondary-side rectification in next-generation power supplies and EV auxiliary systems.

FAQ

What is the maximum junction temperature rating for MBRF1645?

The MBRF1645 has a maximum junction temperature (T_J) of 150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version K2105). This rating enables reliable operation in sealed industrial enclosures and automotive under-hood environments when mounted on an appropriately sized heatsink with ≤3 °C/W total thermal resistance. The MBRF1645 maintains full 16 A current capability up to 125°C case temperature.

Is MBRF1645 available in an AEC-Q101 qualified version?

Yes, the MBRF1645H variant is AEC-Q101 qualified and explicitly listed in the ordering information section of the Taiwan Semiconductor datasheet (Version K2105). The "H" suffix denotes qualification to the full AEC-Q101 stress test standard, including temperature cycling, high-temperature operating life, and mechanical shock testing - making MBRF1645H suitable for automotive power conversion modules.

What is the forward voltage drop of MBRF1645 at full rated current?

At 16 A forward current and 25°C junction temperature, the MBRF1645 exhibits a typical forward voltage (V_F) of 0.63 V, with a maximum value not exceeding 0.63 V per the electrical specifications table. At elevated temperature (125°C), V_F drops to 0.57 V typical - a characteristic behavior of Schottky diodes that improves conduction efficiency under thermal load.

Does MBRF1645 have an electrically isolated package?

Yes, the MBRF1645 uses the ITO-220AC package, where the metal tab is electrically isolated from both anode and cathode terminals. This eliminates the need for insulating pads or shoulder washers when mounting to a common heatsink, simplifying thermal design and reducing assembly cost. The isolation is confirmed in the mechanical data section and package outline diagram of the Taiwan Semiconductor datasheet.

What is the reverse leakage current of MBRF1645 at elevated temperature?

At 45 V reverse voltage and 125°C junction temperature, the MBRF1645 exhibits a maximum reverse leakage current (I_R) of 15 mA, as specified in the electrical characteristics table. This value is measured under pulsed conditions (PW = 30 ms) and reflects real-world behavior in high-temperature SMPS standby modes, where minimizing leakage is essential for meeting no-load power regulations like DOE Level VI and EU CoC Tier 2.