CM900HB-90H Mitsubishi 4500V 900A Single IGBT Module

Content last revised on November 23, 2025

Engineering Insights on the CM900HB-90H for High-Voltage Power Systems

A Premier High-Voltage IGBT Module for Grid-Level and Industrial Power Conversion

The Mitsubishi CM900HB-90H is an H-Series high-voltage IGBT module engineered for extreme power handling in the most demanding applications. With core specifications of 4500V and 900A, this module provides the foundational switching capability required for next-generation power infrastructure. Its key benefits include exceptional high-voltage blocking capability and a design optimized for thermal efficiency and long-term reliability. The CM900HB-90H directly addresses the engineering challenge of managing power in multi-kilovolt systems, such as medium voltage drives and grid-tied converters. For industrial drive systems that demand robust performance at extreme voltage levels, this 4500V module provides a critical design margin and proven reliability.

Key Parameter Overview

Decoding the Specs for High-Voltage Reliability

The technical specifications of the CM900HB-90H are tailored for high-power, high-voltage applications. The 4500V Collector-Emitter Voltage (Vces) rating is a critical parameter, providing the necessary safety margin for systems connected to 3.3kV or 4.16kV power lines. Think of this voltage rating as the electrical "pressure" the device can withstand when it's in the off-state; a higher rating ensures it won't break down under the immense electrical potential found in Variable Frequency Drive (VFD) and HVDC systems. This robust specification is central to preventing catastrophic failures in the field.

Download the CM900HB-90H datasheet for detailed specifications and performance curves.

Application Scenarios & Value

System-Level Benefits in Medium Voltage Drives and Grid Infrastructure

The CM900HB-90H is engineered as a cornerstone component for high-power conversion systems where voltage levels preclude the use of standard 1200V or 1700V modules. Its primary value is realized in applications that directly interface with medium-voltage grids or require the generation of high DC link voltages.

A high-fidelity engineering scenario for this module is in the power cell of a multi-level Medium Voltage Drive (MVD) used to control large industrial motors in mining, pumping, or manufacturing facilities. In these systems, operating from a 4.16kV line, the challenge is to reliably switch high currents without succumbing to voltage stress. The 4500V Vces of the CM900HB-90H provides the essential voltage headroom, ensuring the device operates well within its Safe Operating Area (SOA) even with voltage overshoots caused by stray inductance during switching. This robust design directly translates to higher system reliability and reduced downtime, which are critical metrics in industrial operations. While this module is ideal for such high-voltage applications, for systems operating at lower voltages but requiring higher current, the CM1200DB-34N offers a 1700V, 1200A rating.

• Medium Voltage Drives (MVDs): Provides the core switching function for controlling multi-megawatt motors.
• High-Voltage DC (HVDC) Transmission: Used in the converter stations that form the backbone of modern power grids.
• Industrial Induction Heating: Delivers the high-power pulses needed for large-scale metal treatment and melting.
• Traction Inverters: Suitable for heavy-duty electric vehicles such as trains and mining trucks operating on high-voltage DC lines.

Industry Insights & Strategic Advantage

Enabling Grid Modernization and High-Power Industrial Automation

The trajectory of global energy and industrial sectors is toward higher efficiency, greater power density, and electrification. The CM900HB-90H is strategically positioned to support these trends. As renewable energy sources like large-scale solar and wind farms become more prevalent, the need for efficient and reliable power conversion at the grid level intensifies. High-voltage IGBTs like this module are fundamental building blocks for the inverters and converters that interface these renewable sources with the grid. Furthermore, in heavy industry, the shift from mechanical to electrical power systems (e.g., replacing hydraulic systems with electric drives) requires power electronics capable of handling immense loads. The high voltage and current ratings of the CM900HB-90H directly enable the development of more powerful and efficient Medium Voltage Drives, contributing to significant energy savings and operational improvements in industrial settings.

Frequently Asked Questions (FAQ)

What is the primary design advantage of using a 4500V IGBT module like the CM900HB-90H?
The key advantage is its ability to directly handle medium-voltage power lines (e.g., 3.3kV, 4.16kV), which simplifies the overall topology of high-power converters and inverters. This eliminates the need for complex series-connection of lower-voltage devices, thereby improving system reliability, reducing component count, and increasing power density.

How does the single-element configuration of the CM900HB-90H benefit system design?
The single IGBT configuration offers maximum design flexibility for engineers building custom power stages. It allows for optimized layouts in various converter topologies, such as choppers, DC-DC converters, or individual phases of a multi-level inverter, enabling precise control over the thermal and electrical performance of each switching position.

For inquiries regarding the CM900HB-90H, including availability and technical support for your application, please contact our sales team for a direct consultation.