Taiwan Semiconductor Corporation MBRF1045

Overview

MBRF1045 from Taiwan Semiconductor is a 10A, 45V Schottky barrier rectifier in ITO-220AC package, featuring low forward voltage (0.70 V at 10 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 for automotive infotainment power supplies.

For engineers reviewing the MBRF1045 datasheet, MBRF1045 pinout, MBRF1045 application, or MBRF1045 equivalent, key selection criteria include its 45 V repetitive peak reverse voltage, 3°C/W junction-to-case thermal resistance, 150 A non-repetitive surge rating, and compatibility with lead-free reflow soldering per J-STD-002.

Technical Context

The MBRF1045 employs a single-die Schottky structure optimized for low conduction loss in medium-voltage switching applications. Its guard ring design enhances over-voltage ruggedness, while the matte tin-plated leads ensure reliable solderability and whisker resistance per JESD201 Class 2.

Operating from −55°C to +150°C junction temperature, it delivers stable forward voltage down to 0.57 V at 10 A and 125°C, enabling thermal performance predictability in compact, convection-cooled power stages without forced airflow.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with electrically isolated tab, UL 94V-0 molding compound, and 1.70 g mass. Mounting torque ≤ 0.56 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-MBR1045CT and MBR1045CT, the MBRF1045 offers superior thermal performance (3°C/W vs. ~4.5°C/W), higher surge robustness (150 A vs. ≤125 A), and optional AEC-Q101 qualification-making it preferred for automotive and high-reliability industrial power stages where isolation and ruggedness are critical.

Availability

MBRF1045 is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS output stages, and laptop adapter secondary rectification requiring stable component supply across production lifecycles.

Supply support for MBRF1045 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 devices, rectifiers, and protection components.

The MBRF10xx series was developed to deliver high-efficiency, AEC-Q101-capable Schottky rectifiers in insulated packages for automotive and industrial power conversion where thermal reliability and voltage ruggedness are essential.

FAQ

What is the maximum junction temperature rating for the MBRF1045?

The MBRF1045 has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version M2105). This rating enables operation in under-hood automotive environments and sealed industrial enclosures when properly heatsinked. Derating curves in Figure 1 confirm usable current capacity down to 0°C ambient at full 10 A load.

Does the MBRF1045 have an AEC-Q101 qualified version?

Yes-the MBRF1045H variant is explicitly AEC-Q101 qualified, as confirmed in the Ordering Information section (Note 2) of the Taiwan Semiconductor datasheet. The "H" suffix denotes qualification for automotive-grade stress testing including HTOL, temperature cycling, and unbiased HAST. Standard MBRF1045 is not qualified unless ordered with the H suffix.

What is the forward voltage drop of the MBRF1045 at 10 A and 125°C?

The MBRF1045 exhibits a typical forward voltage of 0.57 V at 10 A and 125°C, per the Electrical Specifications table in the Taiwan Semiconductor datasheet (Page 2, "Forward voltage(1)" row). This lower VF at elevated temperature improves thermal stability in high-ambient applications compared to silicon diodes, which typically show rising VF with temperature.

Is the MBRF1045 compatible with lead-free reflow soldering processes?

Yes-the MBRF1045 features matte tin-plated leads qualified for lead-free reflow soldering per J-STD-002, as stated in the Mechanical Data section. Its UL 94V-0 molding compound and 150°C maximum junction temperature support standard Pb-free thermal profiles (peak ~260°C), and the device passes JESD201 Class 2 whisker testing for long-term interconnect reliability.

What is the reverse leakage current of the MBRF1045 at rated voltage and 125°C?

At 45 V reverse voltage and 125°C junction temperature, the MBRF1045 exhibits a maximum reverse leakage current (I_R) of 15 mA, per the Electrical Specifications table (Page 2). This value is measured under pulse conditions (PW = 30 ms) and reflects worst-case leakage in high-temperature operation-critical for standby power budgeting in always-on systems.