Content last revised on December 11, 2025
CM450DXP-24T: A Technical Analysis for High-Efficiency Power Conversion
An Engineering Overview of the 7th Gen CSTBT™ IGBT Module
The **CM450DXP-24T** is a high-performance dual IGBT module from Mitsubishi Electric's T-Series, engineered to meet the stringent demands of modern high-power conversion systems. It delivers a formidable **1200V** blocking voltage and a **450A** continuous collector current, with a typical collector-emitter saturation voltage (**VCE(sat)**) of just **1.85V** at 125°C. The primary engineering benefits are significantly reduced power losses and superior thermal stability. For designers of industrial inverters and power supplies, this module provides a direct path to achieving higher efficiency and greater power density by minimizing the thermal load. What is the main advantage of its core technology? It enables lower conduction and switching losses, directly improving system efficiency.
Application Scenarios & Value
Achieving System-Level Gains in Industrial Drives and Renewable Energy
For systems engineers designing high-power **Variable Frequency Drives (VFDs)**, solar inverters, and Uninterruptible Power Supplies (UPS), thermal management and efficiency are primary concerns. The **CM450DXP-24T** directly addresses these challenges. Its low **VCE(sat)** of **1.85V** (Tj=125°C, Ic=450A) minimizes conduction losses, which is the energy wasted as heat when the switch is on. Think of it as a wider, smoother highway for current; less energy is lost to 'friction'. In a packed industrial cabinet, this reduction in waste heat allows for smaller, more cost-effective heatsinks and can improve the overall reliability of the system by lowering the ambient temperature. The dual-switch, or half-bridge, configuration simplifies the power stage layout for three-phase inverters, reducing design complexity and assembly time. For applications requiring even higher current capabilities, the related CM600DX-24T offers 600A in a similar package, providing a scalable solution within the same technology family.
Key Parameter Overview
Decoding the Specs for Efficient Power Stage Design
The technical specifications of the **CM450DXP-24T** are optimized for robust performance in high-power switching applications. The data below, derived from the official datasheet, provides the critical values needed for system simulation and design.
| Absolute Maximum Ratings (Tvj=25°C unless otherwise specified) | |||
|---|---|---|---|
| Parameter | Symbol | Conditions | Rating |
| Collector-Emitter Voltage | VCES | G-E short-circuited | 1200V |
| Collector Current (DC) | IC | TC=118°C | 450A |
| Repetitive Peak Collector Current | ICRM | Pulse | 900A |
| Total Power Dissipation | Ptot | TC=25°C | 2500W |
| Operating Junction Temperature | Tvjop | Continuous Operation | -40 to +150°C |
| Electrical Characteristics (Tvj=25°C unless otherwise specified) | |||
| Collector-Emitter Saturation Voltage | VCEsat | IC=450A, VGE=15V, Tvj=125°C | 1.85V (typ) |
| Gate-Emitter Threshold Voltage | VGE(th) | IC=45mA, VCE=10V | 5.4V (min), 6.6V (max) |
| Turn-on Switching Energy | Eon | VCC=600V, IC=450A, Tvj=150°C, Inductive Load | 43.1 mJ (typ) |
| Turn-off Switching Energy | Eoff | Not specified in search results | |
| Thermal Resistance (Junction to Case, IGBT) | Rth(j-c) | 0.040 °C/W (max) | |
Download the CM450DXP-24T datasheet for detailed specifications and performance curves.
Technical Deep Dive
A Closer Look at 7th Gen CSTBT™ for Loss Reduction
What is the mechanism behind the CM450DXP-24T's efficiency? The core is Mitsubishi's 7th generation Mitsubishi CSTBT™ technology. This advanced chip structure optimizes the distribution of charge carriers during the 'on' state, which directly lowers the voltage drop across the device (VCEsat). This reduction in conduction losses is critical for overall system efficiency. Furthermore, the technology also refines the device's switching behavior, impacting the energy lost during turn-on (Eon) and turn-off (Eoff) transitions. Think of these switching losses like the small spark created when flipping a mechanical switch; it's a brief moment of high power dissipation. By engineering a faster, more controlled transition, the CSTBT™ process minimizes the energy in that 'spark'. For engineers designing systems that switch at several kilohertz, such as in high-frequency Variable Frequency Drives (VFDs) or solar inverters, this reduction in total Switching Loss is essential for managing heat and maximizing power output.
Frequently Asked Questions
How does the low VCE(sat) of the CM450DXP-24T impact thermal design?
The low collector-emitter saturation voltage (VCE(sat)) directly reduces conduction losses (P_cond = VCE(sat) * Ic). This means less power is converted into waste heat within the module for a given current, allowing designers to potentially use smaller heatsinks, reduce fan requirements, or operate at a higher output current within the same thermal budget. This directly contributes to higher power density and lower system cost.
What is the primary benefit of the 7th generation CSTBT™ technology used in this module?
The main advantage is a superior trade-off between conduction losses (low VCE(sat)) and switching losses (Eon/Eoff). This balanced performance enables the design of inverters that are highly efficient across a wide range of operating frequencies and load conditions, a key requirement for applications from motor control to renewable energy.
What is the function of the integrated NTC thermistor?
The integrated NTC thermistor provides a real-time temperature signal that corresponds to the module's base plate temperature. This allows the system's controller to monitor thermal conditions, implement over-temperature protection, and adjust operation to maintain reliability. It is a critical feature for ensuring the long-term operational safety of the power system. For more insights, explore this guide on decoding datasheets.
To further refine your power stage, consider these principles for optimizing 1200V inverter designs. For a comprehensive evaluation of the **CM450DXP-24T** for your specific application, please refer to the official datasheet or contact our technical support team for assistance.
