Mitsubishi CM50MXB2-24A IGBT Module

Mitsubishi CM50MXB2-24A IGBT Module: Technical Data for Inverter Design

A Technical Introduction to the CM50MXB2-24A 7-in-1 IGBT Module

The Mitsubishi CM50MXB2-24A is a highly integrated 7-in-1 IGBT module engineered to streamline the development of compact, efficient power conversion systems. This module combines a 1200V, 50A three-phase inverter, brake chopper, and converter bridge into a single package, offering a robust foundation for variable frequency drives. Key specifications include: 1200V | 50A | VCE(sat) 2.7V (max). The primary engineering benefits are significantly reduced conduction losses and a greatly simplified system layout. For engineers wondering how to achieve higher power density in motor control applications, this module provides a direct answer by integrating seven essential power stages, which minimizes external connections and overall system footprint.

Key Parameter Overview

A Functional Breakdown of Electrical and Thermal Characteristics

The technical specifications of the CM50MXB2-24A are organized below by functional block, highlighting the key performance indicators for each section of this integrated module. This component is designed to provide a reliable and efficient power handling solution for various drive applications.

Download the full datasheet for detailed specifications and performance curves.

Application Scenarios & Value

Optimized for Compact and General-Purpose Power Control

The integrated nature of the Mitsubishi CM50MXB2-24A makes it an excellent component choice for applications where space, assembly efficiency, and reliability are critical design parameters. The combination of converter, inverter, and brake functions into a single, isolated module directly addresses the needs of modern, compact industrial equipment.

• General-Purpose Inverters: Its 50A rating is well-suited for controlling AC motors in the 7.5 kW to 15 kW class (depending on voltage and switching frequency), making it ideal for conveyors, pumps, fans, and other industrial machinery.
• Servo Drives & Actuators: In robotics and CNC machinery, the compact footprint and integrated brake chopper simplify the design of servo drives that require precise speed and torque control with regenerative braking capabilities.
• HVAC Systems: The module's efficiency contributes to energy savings in commercial air conditioning and ventilation systems, where variable-speed motor control is essential for meeting modern energy standards.
• Small Industrial Automation: For designers of integrated automation solutions, using a single module like the CM50MXB2-24A instead of multiple discrete components reduces complexity, minimizes potential points of failure, and accelerates time-to-market. What is the primary benefit of the CM50MXB2-24A's design? It simplifies inverter layouts by integrating seven power devices.

Technical Deep Dive

Analyzing the Impact of VCE(sat) on System Efficiency

A critical parameter for any power module is the collector-emitter saturation voltage, or VCE(sat). For the CM50MXB2-24A, the maximum VCE(sat) is 2.7V at its nominal current of 50A. This value is a direct indicator of conduction losses—the primary source of heat generation when the IGBT is in a static 'on' state. Think of VCE(sat) as the toll a current must pay to pass through the switch; a lower toll means less energy is wasted as heat.

This 2.7V rating represents a balanced design choice, providing solid performance for general-purpose applications without the higher cost of more advanced, trench-gate structures often found in premium efficiency modules. The engineering implication is significant: lower conduction losses translate directly to higher overall system efficiency and reduced thermal stress on the component. This allows designers to potentially use smaller, more cost-effective heatsinks or operate the system with a greater thermal margin, enhancing long-term reliability. For compact motor drives under 15 kW requiring design simplicity, this 50A CIB module is the optimal choice.

Frequently Asked Questions (FAQ)

What is the primary benefit of the integrated 7-in-1 (CIB) configuration in the CM50MXB2-24A?
The main advantage is design simplification and power density. By integrating the AC-DC converter, DC-AC inverter, and braking chopper into a single module, engineers can reduce the PCB footprint, minimize the number of high-current interconnects, and shorten the assembly process. This leads to a more compact, reliable, and cost-effective final product.

How does the 2500V isolation voltage impact system design?
The 2500Vrms isolation rating between the terminals and the copper baseplate allows the module to be mounted directly onto a grounded heatsink without requiring additional insulating materials. This simplifies the thermal design, ensures better heat transfer away from the semiconductor junctions, and enhances the overall safety and electrical integrity of the power assembly. It is a critical feature for building robust systems that comply with industrial safety standards.

System Design Considerations

To fully leverage the capabilities of the CM50MXB2-24A, engineers should ensure proper gate drive design and thermal management. For detailed application notes on bootstrap circuit design or thermal interface material selection, reviewing resources from manufacturers like Mitsubishi Electric can provide valuable context.  For a deeper understanding of the core technology, our guide on deconstructing the IGBT structure provides foundational knowledge.

Technical Inquiries

For detailed technical specifications, application support, or to assess the suitability of the CM50MXB2-24A for your specific design, please consult the official datasheet or contact our technical support team for further information.