Mitsubishi FM400TU-07A | Ultra-Low Voltage MOSFET Module for High-Current DC Applications
The Mitsubishi FM400TU-07A is an engineered solution for a very specific and demanding class of power electronics: high-current, low-voltage DC systems. As a dual MOSFET module rated for 37.5V and 400A, it moves beyond the scope of typical IGBTs to deliver unparalleled efficiency in applications where every watt of lost power impacts operational uptime and thermal load. This module is not just a component; it's a strategic building block for robust, next-generation battery-powered and DC motor control systems.
Technical Deep-Dive: A Focus on Efficiency and Reliability
Two core engineering principles define the value of the Mitsubishi FM400TU-07A: an obsessive focus on minimizing conduction losses and a package designed for superior thermal management. These are not just datasheet metrics; they are the foundation of its performance in the field.
- Ultra-Low On-Resistance (Rds(on)): In low-voltage systems, conduction losses (I²R) are the dominant factor in overall efficiency. The FM400TU-07A leverages advanced MOSFET silicon technology to achieve an exceptionally low Rds(on) of just 1.1mΩ (max). This directly translates to reduced heat generation, allowing for smaller heatsinks, higher system power density, and, in battery-powered applications, extended operational cycles.
- Optimized Thermal Pathway: Managing the heat from 400A of current is a significant engineering challenge. The module's construction features an isolated copper baseplate, providing a low thermal resistance path from the MOSFET junction to the heatsink. This robust thermal design ensures the silicon operates within its Safe Operating Area (SOA), even under heavy load conditions, which is fundamental to long-term reliability.
Application Scenarios: Where the FM400TU-07A Excels
The unique specifications of the FM400TU-07A make it the ideal choice for applications where standard power modules are inefficient or impractical. Its performance provides tangible benefits in several key sectors.
- Electric Forklifts & Material Handling: In battery-powered vehicles like forklifts, AGVs, and other material handling equipment, efficiency is paramount. The low conduction losses of the FM400TU-07A directly contribute to longer battery life, meaning more operational hours per charge and reduced facility downtime.
- High-Current DC Motor Drives: For industrial DC motor controls and low-voltage servo applications, this module provides precise and efficient switching. Its dual-MOSFET half-bridge configuration simplifies the design of motor inverters, reducing component count and assembly complexity compared to using dozens of discrete MOSFETs in parallel.
- Battery Management & DC-DC Converters: High-power battery test systems, uninterruptible power supplies (UPS), and large-scale DC-DC converters benefit from the module's high current density and low-loss characteristics. The integrated package helps minimize stray inductance, a critical factor for clean switching in high-frequency power conversion. For a deeper understanding of semiconductor selection, see our guide on IGBT vs. MOSFET.
Mitsubishi FM400TU-07A Key Specifications
The following table outlines the critical parameters that design engineers need for system integration. For a comprehensive list of all electrical and thermal characteristics, please refer to the official product datasheet.
| Parameter | Value |
|---|---|
| Drain-Source Voltage (Vdss) | 37.5V |
| Continuous Drain Current (Id) | 400A |
| Drain-Source On-Resistance (Rds(on)) @ Vgs=10V | 1.1mΩ (Max) |
| Total Power Dissipation (Pch) | 780W |
| Thermal Resistance (Rth(j-c)) Per MOSFET | 0.16°C/W (Max) |
| Package Configuration | Dual MOSFET / Half-Bridge |
For detailed schematics and performance curves, download the official Mitsubishi FM400TU-07A datasheet here.
Engineer's FAQ for the FM400TU-07A
Here are answers to common questions that arise during the design-in process for this specialized module.
- Why choose a module over paralleling discrete MOSFETs? While paralleling discrete components is possible, it introduces significant challenges in ensuring current sharing, managing thermal balance, and controlling parasitic inductance in the PCB layout. The Mitsubishi FM400TU-07A provides a factory-tested, performance-guaranteed solution that eliminates these design risks, simplifies manufacturing, and improves overall system reliability.
- What are the critical gate drive considerations? Due to the large silicon area required for a 400A rating, this module has a significant gate capacitance. A robust gate driver capable of sourcing and sinking high peak currents is essential to ensure fast, clean switching and minimize switching losses. Applying sound gate drive design principles, including using the dedicated Kelvin source connection for the driver return path, is crucial for optimal performance.
If your design requires high-efficiency power switching in a low-voltage, high-current environment, the Mitsubishi FM400TU-07A offers a clear advantage. To discuss your specific application requirements or request a quote, please contact our technical team.
