Taiwan Semiconductor Corporation MBRF745H

Overview

MBRF745H from Taiwan Semiconductor is a 7.5A, 45V AEC-Q101-qualified Schottky barrier rectifier in ITO-220AC package, featuring low forward voltage (0.57V at 7.5A/125°C), 150A surge capability, and guard ring over-voltage protection-used in automotive-grade DC-DC converters and SMPS secondary-side rectification.

For engineers reviewing the MBRF745H datasheet, MBRF745H pinout, MBRF745H application, or MBRF745H equivalent, key selection criteria include its AEC-Q101 qualification, 45V V_RRM, 7.5A continuous forward current, junction-to-case thermal resistance of 7°C/W, and compatibility with high-efficiency, high-reliability power conversion designs requiring solderable matte tin leads and UL 94V-0 molding compound.

Technical Context

This single-die Schottky rectifier operates with a maximum junction temperature of 150°C and supports repetitive peak reverse voltages up to 45V. Its low forward voltage drop (0.72V at 15A/125°C) and high dv/dt rating (10,000 V/µs) enable fast switching and reduced conduction losses in high-frequency power supplies.

The device integrates a guard ring for transient over-voltage robustness and meets JESD201 Class 2 whisker resistance. With 100µA max reverse leakage at 25°C and 15mA at 125°C, it maintains stable blocking performance across automotive temperature ranges.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, matte tin-plated leads, and 0.56 N·m max mounting torque. Polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBRF745H, VS-MBRF745 offers lower cost but lacks automotive qualification and has slightly worse thermal resistance, while MBRF745G matches all critical specs and qualifications-making it ideal for supply chain diversification without design change.

Availability

MBRF745H is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS, and telecom power modules requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for MBRF745H 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 automotive, industrial, and consumer markets since 1979.

The MBRF7xxH series is part of TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability power conversion in automotive and harsh-environment applications where thermal stability and surge robustness are critical.

FAQ

What is the maximum junction temperature rating for MBRF745H?

The MBRF745H has a maximum junction temperature (T_J) of +150°C, validated per AEC-Q101 stress testing. This rating enables reliable operation in under-hood automotive environments and high-ambient industrial settings. Thermal design must ensure that actual junction temperature remains below this limit under worst-case load and ambient conditions. The MBRF745H achieves this with a junction-to-case thermal resistance of 7°C/W and an ITO-220AC package optimized for heatsink coupling.

Is MBRF745H pin-compatible with standard TO-220AC rectifiers?

Yes, the MBRF745H uses the ITO-220AC package, which shares identical mechanical footprint and mounting hole spacing with standard TO-220AC devices. However, its tab is electrically isolated-unlike conductive-tab TO-220AC parts-so no insulating washer is needed when mounting to grounded heatsinks. This isolation eliminates risk of short circuits in high-voltage secondary-side applications, making MBRF745H a safer drop-in upgrade in many legacy designs.

Does MBRF745H meet RoHS and halogen-free requirements?

Yes, MBRF745H is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. These compliance attributes are verified in TSC's material declarations and supported by UL Recognition File #E-326243. Designers can confidently use MBRF745H in environmentally regulated markets including EU, Japan, and China without additional substance screening.

What is the forward voltage of MBRF745H at 15A and 125°C?

The forward voltage of MBRF745H is 0.72 V at 15A and 125°C, as specified in the Electrical Specifications table. This value reflects real-world conduction loss under high-current, high-temperature conditions typical in automotive DC-DC converters. It is measured using pulse testing (PW = 0.3ms) to avoid self-heating artifacts. Designers should use this figure-not the 25°C value-for thermal modeling and efficiency calculations in thermally demanding applications.

How does the guard ring in MBRF745H improve reliability?

The guard ring in MBRF745H is a diffusion-engineered region surrounding the active Schottky junction that controls electric field distribution during reverse-bias transients. It prevents premature edge breakdown and increases the device's ability to withstand repetitive voltage spikes up to its rated V_RRM of 45V. This feature directly enhances long-term reliability in noisy automotive power nets and industrial switching environments where load dump or inductive kick events occur, reducing field failure rates without requiring external clamping components.