Taiwan Semiconductor Corporation MBRF30L45CT

Overview

MBRF30L45CT from Taiwan Semiconductor is a dual-die, 30A/45V low forward-voltage Schottky barrier rectifier in ITO-220AB package, featuring 0.74V max VF at 30A/25°C, 220A non-repetitive surge capability, and AEC-Q101 qualification option (MBRF30L45CTH). It serves as primary output rectification in high-efficiency DC-DC converters and SMPS.

For engineers reviewing the MBRF30L45CT datasheet, MBRF30L45CT pinout, MBRF30L45CT application, or MBRF30L45CT equivalent, key selection criteria include junction-to-case thermal resistance (1°C/W), low VF across temperature (0.67V max at 30A/125°C), dual-die configuration for parallel current handling, and UL recognition (E-326243).

Technical Context

The MBRF30L45CT integrates two independent Schottky diodes in a single ITO-220AB thermally enhanced package with isolated cathodes and common anode connection. Its guard ring structure enables 10,000 V/µs critical dv/dt rating and supports robust operation under transient overvoltage conditions.

Designed for high-frequency switching topologies, it delivers 400 µA max reverse leakage at 25°C and 200 mA at 125°C, with thermal performance validated by R_θJC = 1°C/W and TJ operating range from –55°C to +150°C - enabling use in automotive under-hood and industrial power supplies.

Key Specifications

Pinout & Package

Package: ITO-220AB - thermally optimized 3-terminal molded case with matte tin-plated leads, UL 94V-0 rated compound, and 0.56 N·m max mounting torque. Polarity marked on device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH045 and MBR3045CT, the MBRF30L45CT uniquely combines UL recognition, halogen-free construction, and AEC-Q101 qualification in the ITO-220AB form factor - making it optimal for safety-critical and automotive-qualified power supplies where regulatory alignment and thermal efficiency are jointly prioritized.

Availability

MBRF30L45CT is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC-DC converters, and industrial PLC power modules requiring stable component supply and long-term lifecycle support.

Supply support for MBRF30L45CT 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.

The MBRF30L45CT belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in automotive and industrial power conversion systems.

FAQ

What is the maximum junction temperature rating for the MBRF30L45CT?

The MBRF30L45CT has a maximum junction temperature (T_J) rating of +150°C, with operational capability down to –55°C. This wide range supports deployment in under-hood automotive environments and sealed industrial enclosures. Thermal design must ensure that actual junction temperature stays within this limit under worst-case load and ambient conditions, using the specified R_θJC = 1°C/W and appropriate heatsinking. The MBRF30L45CT datasheet provides derating curves for continuous current versus case temperature.

Does the MBRF30L45CT have UL recognition, and what is the file number?

Yes, the MBRF30L45CT is UL Recognized under File # E-326243. This certification confirms compliance with UL 60950-1 and UL 62368-1 for use in information technology equipment and audio/video power supplies. The recognition applies to the device itself - not just the package - and covers flammability (UL 94V-0), electrical insulation, and construction integrity. UL documentation is available directly from Taiwan Semiconductor upon request.

What is the forward voltage specification for the MBRF30L45CT at elevated temperature?

At 30 A and 125°C junction temperature, the MBRF30L45CT exhibits a maximum forward voltage (V_F) of 0.67 V. This value is lower than its 25°C counterpart (0.74 V max), reflecting the negative temperature coefficient typical of Schottky diodes. This behavior improves thermal stability in high-ambient applications such as automotive DC-DC converters, where reduced V_F at elevated temperature helps limit runaway conduction losses.

How is the dual-die configuration of the MBRF30L45CT implemented electrically?

The MBRF30L45CT contains two independent Schottky die sharing a common anode connected to the metal tab, with separate cathode terminals on Lead 1 and Lead 2. This configuration enables either parallel operation for higher current capacity or independent routing for dual-output or interleaved topologies. The isolation between cathodes allows differential voltage sensing or individual filtering - a key advantage over single-diode packages when designing fault-tolerant or multi-rail power systems.

Is there an AEC-Q101 qualified version of the MBRF30L45CT, and how is it identified?

Yes, the AEC-Q101 qualified version is designated MBRF30L45CTH - the "H" suffix explicitly indicates qualification per AEC-Q101 stress test requirements for discrete semiconductors. It shares identical electrical and thermal specifications with the base MBRF30L45CT but undergoes additional qualification testing including HTGB, HTRB, and temperature cycling. The MBRF30L45CTH is intended for automotive powertrain and chassis applications where component reliability under extreme thermal and mechanical stress is mandatory.