Taiwan Semiconductor Corporation MBRF3045CT

Overview

MBRF3045CT from Taiwan Semiconductor is a 30A dual-die Schottky barrier rectifier in ITO-220AB package, rated for 45V repetitive peak reverse voltage (VRRM), 200A surge current (IFSM), and maximum junction temperature of 150°C. It delivers low forward voltage drop (0.70V typ. @ 15A, 25°C) and supports high-efficiency switching mode power supplies and DC-DC converters.

For engineers reviewing the MBRF3045CT datasheet, MBRF3045CT pinout, MBRF3045CT application, or MBRF3045CT equivalent, key selection factors include its AEC-Q101-qualified variant availability, guard-ring overvoltage protection, UL recognition (E-326243), RoHS/halogen-free compliance, and thermal resistance of 4°C/W (junction-to-case).

Technical Context

This dual-die Schottky rectifier integrates two independent anode-cathode junctions in a single ITO-220AB thermally enhanced package with isolated mounting tab. Its design targets high-frequency switching applications where low conduction loss and fast recovery are critical.

The device features a guard ring structure to improve ruggedness against transient overvoltage events, and meets JESD201 Class 2 whisker resistance. Its 10,000 V/µs critical dv/dt rating ensures stable operation under rapid voltage transients in SMPS flyback and forward topologies.

Key Specifications

Pinout & Package

Package: ITO-220AB - Thermally optimized 3-terminal through-hole package with electrically isolated metal tab for direct heatsink mounting; matte tin-plated leads compliant with J-STD-002 solderability.

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 MBRF3045CT offers verified AEC-Q101 qualification and tighter thermal derating-making it preferred for automotive-grade DC-DC modules where qualification traceability and consistent 30A performance up to 85°C case temperature are required.

Availability

MBRF3045CT is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC-DC converters, and industrial PLC power input stages requiring stable component supply across multi-year production cycles.

Supply support for MBRF3045CT 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 rectifiers, TVS devices, and MOSFETs.

The MBRF30xxCT series was developed for high-efficiency, high-reliability rectification in automotive and industrial power systems-emphasizing low VF, robust surge capability, and AEC-Q101 qualification readiness.

FAQ

What is the pin configuration of the MBRF3045CT?

The MBRF3045CT uses a three-terminal ITO-220AB package with a common-cathode dual-die structure: the metal tab is the common cathode, Lead 1 is Anode 1, and Lead 2 is Anode 2. This configuration supports independent or paralleled rectification paths. Polarity is marked on the device body, and the tab is electrically isolated for direct heatsink mounting. The MBRF3045CT pinout enables flexible layout in dual-output or redundant power designs.

Is the MBRF3045CT AEC-Q101 qualified?

The base MBRF3045CT is not automatically AEC-Q101 qualified; however, the variant MBRF3045CTH (with 'H' suffix) is explicitly qualified per AEC-Q101 Rev D for automotive applications. Qualification includes stress testing for temperature cycling, humidity bias, and high-temperature operating life. For automotive designs, specify MBRF3045CTH to ensure compliance-standard MBRF3045CT lacks this certification. Always verify the part marking and packaging code when ordering the MBRF3045CT.

What is the maximum forward voltage drop of the MBRF3045CT at full load?

The MBRF3045CT has a maximum forward voltage drop of 0.82 V per diode at 30 A and 25°C junction temperature. At elevated temperature (125°C), the VF increases to 0.73 V max under the same 30 A condition. These values reflect actual conduction losses measured under pulsed test conditions (PW = 0.3 ms). The MBRF3045CT's low VF directly contributes to reduced power dissipation and higher system efficiency in high-current rectification stages.

Can the MBRF3045CT replace the MBRF3035CT in an existing design?

Yes, the MBRF3045CT can directly replace the MBRF3035CT in most cases because both share identical package (ITO-220AB), pinout, thermal characteristics, and forward current rating (30 A). The only difference is the higher 45 V VRRM rating of the MBRF3045CT versus 35 V for the MBRF3035CT-providing additional reverse voltage margin. No PCB or thermal redesign is needed. However, always validate reverse leakage (IR) and dynamic behavior under actual operating conditions before qualifying the MBRF3045CT as a drop-in replacement.

What is the thermal resistance from junction to case for the MBRF3045CT?

The MBRF3045CT has a typical junction-to-case thermal resistance (RθJC) of 4°C/W, measured from the silicon die to the metal tab surface. This value is confirmed in the official Taiwan Semiconductor datasheet and applies under standard mounting conditions with proper torque (≤0.56 N·m) and flat heatsink interface. The low RθJC enables efficient heat transfer to external heatsinks, supporting continuous 30 A operation within thermal limits. Accurate thermal modeling of the MBRF3045CT must include this parameter alongside heatsink resistance and ambient conditions.