Taiwan Semiconductor Corporation MBRAD2045H

Overview

MBRAD2045H from Taiwan Semiconductor is a 20 A, 45 V Schottky barrier rectifier in ThinDPAK package, designed for low-loss freewheeling and reverse battery protection in automotive DC/DC converters. It features 0.63 V forward voltage at 20 A/25°C, 330 A surge capability, -55°C to +150°C junction temperature range, and AEC-Q101 qualification for under-hood use.

For engineers reviewing the MBRAD2045H datasheet, MBRAD2045H pinout, MBRAD2045H application, or MBRAD2045H equivalent, key selection criteria include forward voltage at high current and temperature, thermal resistance (R_θJL = 2.0°C/W), surge rating (IFSM = 330 A @ 8.3 ms), and automotive-grade reliability per AEC-Q101.

Technical Context

The MBRAD2045H is a single-die Schottky rectifier optimized for high-frequency switching topologies where low conduction loss and fast recovery are critical. Its 0.54 V typical VF at 10 A/25°C and 927 pF junction capacitance support efficient operation in 100–500 kHz DC/DC stages.

Thermal design leverages the ThinDPAK's low R_θJL of 2.0°C/W with ideal heatsink and R_θJC of 2.5°C/W to sustain 20 A continuous current within its 150°C max junction limit. Polarity is marked by cathode band; terminals are matte tin-plated per J-STD-002.

Key Specifications

Pinout & Package

Package: ThinDPAK (JEDEC TO-252 variation AE), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band. Matte tin-plated leads, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-MBR2045CT and MBR2045CT, the MBRAD2045H offers surface-mount compatibility, lower thermal resistance, and AEC-Q101 validation-making it the preferred choice for new automotive power designs requiring reliability, compactness, and thermal performance.

Availability

MBRAD2045H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and LED headlamp drivers requiring stable component supply across extended temperature ranges and high-reliability production programs.

Supply support for MBRAD2045H 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 MBRAD2045H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for automotive power conversion and protection where low VF, high surge tolerance, and thermal robustness are essential.

FAQ

What is the maximum junction temperature rating for the MBRAD2045H?

The MBRAD2045H has a maximum junction temperature (T_J) of +150°C and a minimum of -55°C. This wide operating range allows deployment in under-hood automotive environments where ambient temperatures exceed 105°C. The device's R_θJL of 2.0°C/W enables reliable thermal management when mounted on appropriate copper areas. Always verify actual junction temperature using measured case temperature and R_θJC = 2.5°C/W in your final layout.

Is the MBRAD2045H qualified for automotive applications?

Yes, the MBRAD2045H is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive electronic components. This qualification covers the entire MBRAD2045H production lot per version A2303 and supports use in engine control, lighting, and body electronics where reliability under harsh conditions is mandatory.

What does the marking code '2045' on the MBRAD2045H indicate?

The marking code '2045' laser-etched on the MBRAD2045H top surface identifies the device as a 20 A, 45 V Schottky rectifier. It is not a date or lot code but a functional designation aligned with Taiwan Semiconductor's internal part numbering system. This marking appears alongside factory code and date code in the YWWF format per JEDEC standards and confirms the device's rated parameters at time of manufacture.

How does the MBRAD2045H compare to standard silicon rectifiers in terms of forward voltage?

The MBRAD2045H delivers a typical forward voltage of 0.54 V at 10 A/25°C and 0.58 V at 20 A/125°C-significantly lower than silicon rectifiers (typically 0.9–1.1 V). This reduction directly lowers conduction losses, improves power supply efficiency, and reduces thermal load in high-current automotive DC/DC converters. Its Schottky architecture also eliminates minority-carrier storage delay, enabling clean commutation in high-frequency switching.

What is the recommended PCB pad layout for the MBRAD2045H ThinDPAK package?

Taiwan Semiconductor specifies a suggested pad layout in datasheet revision A2303, including 5.92 mm × 4.57 mm thermal pad with 0.254 mm clearance and 0.41 mm stencil aperture. The exposed pad (Pin 3) must be fully soldered to ≥250 mm² of inner-layer copper pour connected to cathode net. Avoid thermal reliefs on this pad. Solder mask defined (SMD) pads are recommended to prevent bridging; reflow profile must comply with J-STD-020 Level 1 moisture sensitivity.