Taiwan Semiconductor Corporation MBRS1045

Overview

MBRS1045 from Taiwan Semiconductor is a 10 A, 45 V Schottky barrier surface-mount rectifier in TO-263AB (D2PAK) package, optimized for high-efficiency switching mode power supplies and DC–DC converters with low forward voltage drop and high surge current capability.

For engineers reviewing the MBRS1045 datasheet, MBRS1045 pinout, MBRS1045 application, or MBRS1045 equivalent, key selection criteria include its 45 V repetitive peak reverse voltage, 120 A non-repetitive surge rating, 0.57 V forward voltage at 10 A/125°C, junction-to-case thermal resistance of 2°C/W, and RoHS/halogen-free compliance for industrial power designs.

Technical Context

The MBRS1045 operates as a single-die, unidirectional Schottky rectifier with guard ring structure for overvoltage protection and JESD201 Class 2 whisker resistance. Its low VF and fast recovery enable high-frequency operation without reverse recovery charge.

Designed for surface-mount assembly on PCBs with thermal pads, it supports automated placement and achieves 175°C maximum junction temperature while maintaining stable conduction under 10 A continuous forward current and 120 A surge pulses.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, single-anode/single-cathode configuration with exposed cathode tab for thermal and electrical connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-MBR1045CT and MBR1045CT, the MBRS1045 offers superior thermal performance (2°C/W vs. ≥3.5°C/W), surface-mount compatibility, and integrated guard ring protection-making it preferred for high-power-density, thermally constrained, and ruggedized industrial DC–DC designs.

Availability

MBRS1045 is available at Aetrix Electronics and suitable for switching mode power supplies, laptop adapters, and industrial DC–DC converters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for MBRS1045 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 MBRS1045 belongs to TSC's MBRS10xx Schottky rectifier family, engineered specifically for high-efficiency, surface-mount secondary-side rectification in compact, thermally demanding power conversion systems.

FAQ

What is the maximum junction temperature rating for MBRS1045?

The MBRS1045 has a maximum junction temperature (TJ max) of 175°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows sustained operation in high-ambient environments such as enclosed industrial power supplies or telecom equipment. Derating curves confirm usable current capacity down to TC = 110°C at full 10 A rating. Thermal design must maintain case temperature below this limit using the specified RθJC = 2°C/W path.

Does MBRS1045 have a guard ring, and what function does it serve?

Yes, the MBRS1045 incorporates a guard ring structure explicitly stated in its features list. This design element enhances edge termination robustness, improving resistance to avalanche breakdown during voltage transients-such as those occurring in flyback or resonant converters without clamping circuits. It contributes directly to the device's 10,000 V/μs dv/dt rating and supports reliable operation under repetitive overvoltage stress without external protection components.

What is the forward voltage of MBRS1045 at 10 A and 125°C?

The forward voltage (VF) of MBRS1045 is 0.57 V at IF = 10 A and TJ = 125°C, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value reflects real-world conduction loss under elevated thermal conditions typical in high-load DC–DC converters. At 25°C, VF is lower (~0.72 V at 10 A), but the 125°C figure is critical for thermal design validation and efficiency calculation at steady-state operating temperature.

Is MBRS1045 RoHS and halogen-free compliant?

Yes, MBRS1045 is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the FEATURES section of the official Taiwan Semiconductor documentation. The device uses matte tin-plated leads and UL 94V-0 molding compound, satisfying environmental and safety requirements for commercial, industrial, and telecom end equipment. No exemptions are cited, and compliance applies to all homogeneous materials in the finished device.

What is the moisture sensitivity level (MSL) of MBRS1045, and how does it affect assembly?

The MBRS1045 has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not sensitive to moisture and requires no baking prior to reflow soldering. This simplifies SMT line integration, eliminates floor-life tracking, and supports standard reflow profiles-including lead-free cycles up to 260°C peak. The Level 1 rating is enabled by hermetic molding and controlled internal humidity, ensuring reliability across high-volume manufacturing without process deviation.