Content last revised on December 1, 2025
Mitsubishi MG150J7KS61: An Integrated Power Solution for Motor Control
The Mitsubishi MG150J7KS61 is a highly integrated power module designed to streamline the development of compact and efficient three-phase power conversion systems. Engineered for performance and reliability, this module combines a full inverter stage and a brake circuit into a single, robust package. With core specifications of 600V and a **150A** peak current rating, it offers a solid foundation for demanding industrial applications. Key benefits include dramatically simplified system assembly and integrated thermal protection. For engineers designing mid-power servo systems, this 7-in-1 module is the optimal choice for reducing component count and accelerating time-to-market.
Key Parameter Overview
Decoding the Specs for Integrated Drive Design
The technical specifications of the MG150J7KS61 are tailored for robust performance in AC motor control and power switching applications. The parameters below highlight the module's capabilities, grouped by function for clear evaluation by design engineers. This integrated approach, combining six main IGBTs and a seventh for braking, provides a significant advantage in system design. The 150A peak current rating is particularly critical for handling the inrush currents typical in motor startup sequences.
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Absolute Maximum Ratings (Tj = 25°C) | |||
| Collector-Emitter Voltage | VCES | 600 | V |
| Gate-Emitter Voltage | VGES | ±20 | V |
| Collector Current (Continuous) | IC | 75 | A |
| Collector Current (Peak) | ICP | 150 | A |
| Maximum Power Dissipation | PD | 750 | W |
| Electrical and Thermal Characteristics | |||
| Collector-Emitter Saturation Voltage (IC = 150A) | VCE(sat) | 2.3 (Max) | V |
| Collector Cutoff Current | ICES | 1 | mA |
| Input Capacitance (VCE = 10V) | Cies | 30 | nF |
| Operating Temperature | Tj | -20 to +150 | °C |
Download the MG150J7KS61 datasheet for detailed specifications and performance curves.
Application Scenarios & Value
Achieving System-Level Benefits in Compact Motion Control Systems
The MG150J7KS61 is engineered specifically for applications where space, assembly cost, and reliability are primary design drivers. Its high level of integration makes it an exceptional choice for modern, compact industrial equipment.
Consider the design of a servo drive for a multi-axis CNC milling machine. In such an environment, cabinet space is at a premium, and thermal management is critical. By using the MG150J7KS61, an engineer can replace seven discrete IGBTs (and their associated gate drive isolation components and freewheeling diodes) plus an external thermistor with a single, unified module. The module's **7-in-1** configuration, which includes a full three-phase inverter and a **brake chopper**, handles both motor operation and regenerative energy during rapid deceleration. This integration not only shrinks the PCB footprint but also significantly reduces the number of electrical connections—a common source of failure. The module's **isolated baseplate** further simplifies the manufacturing process by allowing direct mounting to a common heatsink, improving thermal efficiency and lowering assembly time. For applications requiring lower current handling, the related QM100DY-H offers a solution in a different configuration.
- AC Motor Control: Ideal for variable frequency drives (VFDs) up to approximately 30-40 kW, where its robust 150A peak current rating ensures reliable operation during startup and load changes.
- Motion/Servo Control: The integrated brake chopper is essential for precision robotics and automation systems that require fast and controlled deceleration.
- Uninterruptible Power Supplies (UPS): The module's compact design and thermal efficiency contribute to smaller and more reliable UPS systems for industrial and commercial use.
- Welding Power Supplies: Capable of handling the high-current pulses required in advanced welding applications.
Technical Deep Dive
Understanding the Integrated Brake Chopper's Role
A key feature of the MG150J7KS61 that sets it apart for motion control applications is the seventh IGBT, configured as a brake chopper. When an AC motor decelerates, it acts as a generator, sending energy back to the drive's DC bus. Without a path to dissipate this energy, the bus voltage would rise uncontrollably, potentially damaging components. The integrated brake chopper provides this critical safety function within the same package.
Think of the brake chopper as the managed energy release valve for the motor's regenerative braking. When the DC bus voltage exceeds a set threshold, the chopper's IGBT is pulsed, diverting the excess current through an external braking resistor. This process converts the unwanted electrical energy into heat, maintaining the DC bus voltage within its Safe Operating Area (SOA). By integrating this function, the MG150J7KS61 not only saves space but also shortens the current loop between the inverter and the brake, which can reduce stray inductance and improve dynamic performance. This is a prime example of how IGBT module integration leads to more robust and reliable system design.
Frequently Asked Questions (FAQ)
What is the key advantage of the '7-in-1' configuration in the MG150J7KS61?
The primary advantage is system simplification. It integrates a complete three-phase inverter (six IGBTs with freewheeling diodes) and a brake chopper (one IGBT with diode) into a single module, drastically reducing component count, simplifying PCB design, minimizing assembly labor, and improving overall system reliability by reducing interconnections.
The datasheet specifies a 75A continuous and 150A peak current. Which value is more critical for motor drive applications?
Both are important, but the 150A peak current (Icp) is often the deciding factor in motor drives. It defines the module's ability to withstand short-term overload conditions, such as motor startup inrush current or sudden load changes, without failure. The 75A continuous current (Ic) rating dictates the sustainable power output under constant load.
How does the integrated thermistor improve system reliability?
The integrated NTC thermistor provides a real-time temperature reading directly from the module's baseplate. This allows the system controller to implement precise over-temperature protection, throttling back power or shutting down the system before the IGBTs reach a critical temperature. This is far more accurate than an external sensor and is fundamental for building a truly reliable servo drive.
For engineering teams looking to optimize the design of three-phase industrial drives, the MG150J7KS61 offers a compelling combination of integration and performance. To evaluate this module for your next project or to request a quote, please contact our technical sales team.
