Taiwan Semiconductor Corporation MBR1090

Overview

MBR1090 from Taiwan Semiconductor is a 10 A, 90 V Schottky barrier rectifier in TO-220AC package, featuring low forward voltage (0.85 V at 10 A, 25°C), high surge current capability (150 A), and junction-to-case thermal resistance of 3°C/W. It is used in high-efficiency DC/DC converters and switching power supplies where fast recovery and minimal conduction loss are critical.

For engineers reviewing the MBR1090 datasheet, MBR1090 pinout, MBR1090 application, or MBR1090 equivalent, key selection criteria include its 90 V repetitive peak reverse voltage, 150 A non-repetitive surge rating, 6 mA reverse leakage at 125°C, AEC-Q101 qualification option (MBR1090H), and TO-220AC mechanical compatibility with standard heatsink mounting.

Technical Context

The MBR1090 operates as a single-die, unidirectional Schottky rectifier with no intrinsic recovery time, enabling high-frequency operation in SMPS topologies. Its guard ring structure provides overvoltage protection, and matte tin-plated leads ensure solderability per J-STD-002.

Thermally, it supports continuous operation up to 150°C junction temperature with a 3°C/W junction-to-case resistance, and exhibits 6 mA reverse leakage at rated 90 V and 125°C - a critical parameter for thermal stability in enclosed power modules.

Key Specifications

Pinout & Package

Package: TO-220AC - 3-lead, single-ended through-hole package with isolated tab (cathode-connected tab), UL 94V-0 molding compound, and 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-MBR1090CT and MBR1090CT, the MBR1090 offers single-die simplicity, lower thermal resistance (3°C/W), and AEC-Q101 qualification path - making it optimal for space-constrained, thermally demanding, or automotive-grade single-output rectification.

Availability

MBR1090 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and automotive LED drivers requiring stable component supply and long-term manufacturability.

Supply support for MBR1090 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 is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and automotive markets.

The MBR10x series was developed to deliver high-current Schottky rectification with robust thermal performance and automotive-grade reliability in standard TO-220AC packaging - targeting cost-sensitive yet thermally demanding power conversion systems.

FAQ

What is the maximum junction temperature rating for the MBR1090?

The MBR1090 has a maximum junction temperature (TJ MAX) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows continuous operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations when properly heatsinked. Derating curves confirm usable current capacity down to ~6 A at 125°C case temperature.

Is the MBR1090 pin-compatible with other parts in the MBR10x family?

Yes, all MBR10x parts including MBR1090 share identical TO-220AC package dimensions, pinout, and mechanical mounting features. The anode, cathode, and tab connections are functionally and physically consistent across the series - enabling board-level voltage scalability (35 V to 200 V) without layout changes. However, thermal and electrical performance varies by voltage grade.

Does the MBR1090 have AEC-Q101 qualification?

The base MBR1090 is not AEC-Q101 qualified, but Taiwan Semiconductor offers the MBR1090H variant which is fully AEC-Q101 qualified for automotive applications. The "H" suffix denotes qualification per stress test requirements including temperature cycling, humidity bias, and ESD. Designers requiring automotive compliance must specify MBR1090H, not MBR1090.

What is the forward voltage of the MBR1090 at 10 A and 125°C?

The MBR1090 exhibits a typical forward voltage of 0.71 V at 10 A and 125°C junction temperature, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This lower VF at elevated temperature reflects improved conduction behavior versus room-temperature measurement and is critical for thermal stability analysis in high-power-density designs.

How does the MBR1090's reverse leakage compare to lower-voltage variants like MBR1045?

At 125°C and rated reverse voltage, the MBR1090 specifies 6 mA maximum reverse leakage (IR), whereas MBR1045 specifies 15 mA under the same conditions. This lower leakage at higher voltage grade results from optimized doping and guard ring design, improving reliability in high-temperature, high-blocking applications such as telecom rectifiers or industrial motor drives where leakage-induced heating must be minimized.