Taiwan Semiconductor Corporation MBR4035PTH

Overview

MBR4035PTH from Taiwan Semiconductor is a 40A, 35V AEC-Q101-qualified Schottky barrier rectifier in TO-247AD package, featuring 0.75V max forward voltage at 20A/25°C, 330A surge current capability, and guard ring overvoltage protection. It serves as a high-efficiency output rectifier in automotive-grade switching power supplies.

For engineers reviewing the MBR4035PTH datasheet, MBR4035PTH pinout, MBR4035PTH application, or MBR4035PTH equivalent, key selection criteria include its 35V V_RRM, 1.2°C/W R_θJC, AEC-Q101 qualification, low VF at high temperature, and dual-die TO-247AD construction for thermal reliability in SMPS and DC-DC converters.

Technical Context

This device implements a single common-cathode dual-die Schottky structure with guard ring edge termination, enabling robust 35V reverse blocking while maintaining low conduction loss. Its 1.2°C/W junction-to-case thermal resistance and 150°C maximum junction temperature support high-power density designs without forced airflow.

The MBR4035PTH delivers 0.75V typical forward voltage at 20A/25°C and 0.75V max at 40A/125°C, with reverse leakage limited to 1000µA at 25°C and 30mA at 125°C - critical for efficiency retention in thermally demanding automotive and industrial adapters.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - isolated tab, matte tin-plated leads, UL 94V-0 molding compound, 6.10g weight, polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-MBR4035CT and MBR4035CT, the MBR4035PTH provides superior thermal performance (1.2 vs. ≥2.5°C/W), AEC-Q101 validation, and guard ring protection - making it the sole option qualified for under-hood automotive DC-DC converters requiring long-term reliability at 125°C junction temperature.

Availability

MBR4035PTH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS outputs, and medical-grade adapters requiring stable component supply and AEC-Q101 compliance.

Supply support for MBR4035PTH 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and computing markets since 1979.

The MBR4035PTH belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-current, high-reliability output rectification in automotive and industrial power conversion systems.

FAQ

What does the 'H' suffix in MBR4035PTH signify?

The 'H' suffix in MBR4035PTH indicates full AEC-Q101 qualification - verified through accelerated stress testing including high-temperature operating life, temperature cycling, and humidity testing. This distinguishes MBR4035PTH from the standard MBR4035PT and confirms its suitability for automotive power electronics where reliability under thermal and mechanical stress is mandatory. The MBR4035PTH retains identical electrical parameters but adds qualification documentation and traceability required by Tier 1 suppliers.

Is MBR4035PTH pin-compatible with TO-247AD rectifiers from other manufacturers?

Yes, MBR4035PTH uses the industry-standard TO-247AD (TO-3P) outline with 3-pin single-ended configuration: Anode 1, Anode 2, and common Cathode. Its lead frame geometry, mounting hole position, and tab isolation comply with JEDEC TO-247AD specifications, enabling direct mechanical replacement in existing layouts designed for equivalents like STTH40R03CW or Vishay VS-MBR4035CT (though thermal and qualification differences must be validated).

What is the maximum allowable case temperature for MBR4035PTH in continuous operation?

The MBR4035PTH supports a maximum case temperature of 115°C in continuous operation when mounted to a heatsink with ≤0.5°C/W total thermal resistance (including interface and heatsink). This derives from its 150°C T_Jmax, 1.2°C/W R_θJC, and 40A I_F rating - allowing 35°C temperature rise across the junction-to-case path at full load. Exceeding 115°C case temperature risks exceeding T_Jmax and triggering thermal shutdown in system-level protection schemes.

Does MBR4035PTH include any integrated ESD or transient protection features?

The MBR4035PTH incorporates a guard ring structure around the Schottky junction to improve ruggedness against overvoltage transients, but it does not include active ESD protection circuitry. Its 10,000 V/μs dV/dt rating and 330A I_FSM provide inherent immunity to fast-rising line transients, and the UL Recognized status confirms compliance with basic insulation requirements. For systems requiring IEC 61000-4-2 or ISO 10605 ESD robustness, external TVS clamping remains necessary.

How does the dual-die configuration of MBR4035PTH affect PCB layout compared to single-die alternatives?

The dual-die common-cathode configuration of MBR4035PTH allows independent routing of two anodes to separate transformer windings or interleaved phases while sharing a single low-inductance cathode return path - reducing loop area and EMI. Unlike two discrete TO-220 devices, this integration cuts PCB area by ~40% and eliminates parallel-current imbalance risk. Layout must maintain symmetric copper pour under both anodes and ensure cathode plane continuity to the main ground plane to preserve thermal and electrical performance.