Taiwan Semiconductor Corporation MBRAD20150H

Overview

MBRAD20150H from Taiwan Semiconductor is a 20 A, 150 V Schottky barrier rectifier in ThinDPAK package, designed for low-loss freewheeling and reverse battery protection in automotive DC/DC converters. It features 0.87 V forward voltage at 20 A/25°C, 330 A surge rating, -55°C to +150°C junction temperature range, and AEC-Q101 qualification for under-hood use.

For engineers reviewing the MBRAD20150H datasheet, MBRAD20150H pinout, MBRAD20150H application, or MBRAD20150H equivalent, key selection criteria include its 2.0°C/W junction-to-lead thermal resistance, 389 pF junction capacitance at 4 V, moisture sensitivity level 1 compliance, RoHS/halogen-free status, and suitability for high-frequency 150 V automotive power rails.

Technical Context

This Schottky rectifier uses a single-die construction optimized for low forward voltage and fast switching in 150 V systems. Its 0.75 V VF at 20 A/125°C enables stable operation in thermally constrained automotive modules, while the 330 A IFSM (8.3 ms) supports transient load dumps without failure.

The ThinDPAK package delivers 2.5°C/W junction-to-case thermal resistance when mounted on an aluminum plate, enabling efficient heat transfer in space-constrained layouts. Polarity is marked by cathode band, and terminals are matte tin-plated per J-STD-002 for reliable solderability.

Key Specifications

Pinout & Package

Package: ThinDPAK (JEDEC TO-252 variation AE), 3-terminal surface-mount package with exposed drain pad for thermal enhancement. Cathode indicated by band on top marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20BQ150-M3/45 and MBR20150CT, the MBRAD20150H uniquely combines AEC-Q101 qualification, moisture level 1, and ThinDPAK's 2.0°C/W RθJL-making it the only choice for thermally dense, high-reliability automotive SMT power stages.

Availability

MBRAD20150H 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 long production lifecycles.

Supply support for MBRAD20150H 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 global automotive, industrial, and consumer markets since 1979.

The MBRAD20150H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive electrification systems.

FAQ

What is the maximum junction temperature rating for the MBRAD20150H?

The MBRAD20150H has a maximum junction temperature (TJ) of +150°C, with operational capability from -55°C to +150°C. This rating is validated per AEC-Q101 stress testing and allows continuous operation in under-hood automotive environments where ambient temperatures reach 125°C, provided thermal design maintains junction temperature within limit. The MBRAD20150H datasheet specifies derating curves confirming 20 A operation up to 100°C ambient with appropriate heatsinking.

Is the MBRAD20150H pin-compatible with other ThinDPAK Schottky rectifiers?

The MBRAD20150H uses standard ThinDPAK (TO-252AE) pinout: Pin 1 = Anode, Pin 2 = Cathode, and Pin 3 = Exposed thermal pad (cathode-connected). While mechanical footprint matches JEDEC TO-252, electrical compatibility depends on voltage/current ratings and thermal performance-e.g., MBRAD20100H (100 V) shares the same package but differs in VRRM and VF. Always verify circuit-level requirements before substitution. The MBRAD20150H must be used with its specified cathode-band polarity marking.

Does the MBRAD20150H require special handling during PCB assembly?

No special handling is required: the MBRAD20150H has moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking. Its matte tin-plated leads comply with J-STD-002 for reliable solder wetting. For optimal thermal performance, the exposed pad must be soldered to ≥100 mm² copper area with ≥6 thermal vias. The MBRAD20150H marking code "20150" aids post-assembly verification.

How does the MBRAD20150H perform at elevated temperatures?

At 125°C junction temperature, the MBRAD20150H maintains VF = 0.75 V (max) at 20 A-12% lower than at 25°C-due to Schottky barrier physics, reducing conduction loss in hot environments. Reverse leakage rises to 5 mA (max), still well below typical application currents. Thermal resistance values (RθJL = 2.0°C/W) remain valid, enabling predictable thermal design. The MBRAD20150H's AEC-Q101 qualification confirms stable parametric behavior across its full -55°C to +150°C range.

Can the MBRAD20150H be used in synchronous rectification designs?

No-the MBRAD20150H is a passive Schottky rectifier, not a synchronous rectifier controller or MOSFET driver. It functions as a unidirectional freewheeling device and cannot replace active gate-driven MOSFETs in synchronous topologies. However, it is commonly paired with high-side N-channel MOSFETs in non-synchronous buck converters where simplicity and cost outweigh efficiency gains from synchronous rectification. The MBRAD20150H's low VF and fast recovery make it ideal for such roles.