Taiwan Semiconductor Corporation MBR6040CTH

Overview

MBR6040CTH from Taiwan Semiconductor is a 60A, 40V dual-die Schottky barrier rectifier in TO-220AB package, qualified to AEC-Q101 for automotive-grade reliability, with 0.5°C/W junction-to-case thermal resistance and 250A surge capability-used in high-efficiency DC/DC converters and SMPS primary-side rectification.

For engineers reviewing the MBR6040CTH datasheet, MBR6040CTH pinout, MBR6040CTH application, or MBR6040CTH equivalent, key selection criteria include forward voltage at 60A/125°C (0.76–0.81 V), repetitive peak reverse voltage (40 V), thermal resistance (0.5°C/W), surge rating (250A @ 8.3 ms), and AEC-Q101 qualification status.

Technical Context

This dual-die Schottky rectifier integrates two independent 60A/40V diodes in a single TO-220AB thermally optimized package, enabling shared heatsinking for high-power synchronous or center-tapped topologies. Its guard ring structure provides overvoltage protection, and low VF at elevated temperature supports stable operation in automotive under-hood environments.

The device delivers 10,000 V/μs critical dv/dt rating and meets JESD201 Class 2 whisker resistance, supporting robust switching in noisy industrial and automotive power rails. Reverse leakage remains ≤40 mA at 125°C, ensuring predictable blocking behavior in high-temperature DC/DC stages.

Key Specifications

Pinout & Package

Package: TO-220AB, 3-terminal, isolated tab, matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, 1.80 g 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 MBR6040CTH, the Vishay part offers lower cost but no automotive qualification, while the ON Semiconductor version matches AEC-Q101 compliance and differs only in thermal resistance-making it a drop-in alternative where 0.05°C/W derating margin is acceptable.

Availability

MBR6040CTH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS, and EV onboard charger auxiliary supplies requiring stable component supply with AEC-Q101 assurance and thermal performance consistency.

Supply support for MBR6040CTH 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 global automotive, industrial, and computing markets since 1979.

The MBR6040CTH belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability, high-current automotive power conversion where thermal stability and transient robustness are critical.

FAQ

What does the "H" suffix in MBR6040CTH signify?

The "H" suffix in MBR6040CTH explicitly denotes AEC-Q101 qualification per the manufacturer's ordering information. This certification confirms that the MBR6040CTH has undergone stress testing-including temperature cycling, humidity bias, and mechanical shock-to meet automotive-grade reliability requirements. Unlike the base MBR6040CT, the MBR6040CTH is approved for use in safety-critical vehicle subsystems.

Is MBR6040CTH pin-compatible with MBR6040CT?

Yes, MBR6040CTH is mechanically and electrically pin-compatible with MBR6040CT-both use identical TO-220AB packaging, terminal layout, and marking diagram. The only distinction is AEC-Q101 qualification and associated process controls; no PCB or schematic changes are needed when upgrading from MBR6040CT to MBR6040CTH in automotive designs.

What is the maximum continuous case temperature for MBR6040CTH at full 60A load?

At 60A continuous forward current, MBR6040CTH achieves thermal equilibrium at ≤85°C case temperature when mounted on a standard 15 cm² copper heatsink with thermal interface material. This is derived from its 0.5°C/W RθJC and 0.76 V VF at 125°C junction, allowing safe operation within the -55°C to +150°C junction range without derating.

Does MBR6040CTH support parallel operation of its dual dies?

MBR6040CTH integrates two independent Schottky dies sharing only the cathode terminal; they are not internally paralleled. Engineers may connect them in parallel for higher current, but must ensure matched thermal paths and external current-sharing resistors due to inherent VF mismatch-especially critical at high temperature where VF drift varies between dies.

How does the guard ring in MBR6040CTH improve system-level reliability?

The guard ring in MBR6040CTH prevents localized electric field concentration at the die edge, suppressing premature avalanche breakdown during 40V-rated transients like ISO 7637-2 Pulse 5a (load dump). This extends operational life in automotive 12V/48V systems by reducing cumulative damage from repetitive overvoltage events, directly improving field failure rates in power modules.