CM20TF-24H Mitsubishi 1200V 20A Single IGBT Module

Content last revised on February 6, 2026

CM20TF-24H by Mitsubishi: A Deep Dive into the 1200V Single IGBT Module

Engineered for Efficiency in Low-Power Industrial Systems

The Mitsubishi CM20TF-24H is a 1200V | 20A | 2.2V typical VCE(sat) single IGBT module from the H-Series, engineered for high-frequency switching applications. Its design prioritizes low conduction losses and robust performance, key for enhancing system efficiency and reliability. The key benefits include reduced power dissipation and simplified thermal management. This module directly addresses the challenge of creating compact, energy-efficient power stages by integrating a low-loss IGBT with a super-fast recovery free-wheel diode in an isolated package. For systems demanding high efficiency in low-power industrial drives and power supplies, this module's low VCE(sat) makes it a strategically sound choice.

Application Scenarios & Value

System-Level Gains in Low-Power Motion and Conversion

The CM20TF-24H is engineered to excel in applications where efficiency and compact design are critical project drivers. Its primary value is demonstrated in low-power Variable Frequency Drives (VFDs), general-purpose inverters, and Uninterruptible Power Supplies (UPS) operating on 400V/480V AC lines.

Consider the design of a compact servo drive for an automated assembly line. The engineering challenge is to minimize the physical size of the drive and its heatsink while maintaining high operational efficiency to reduce long-term energy costs. The CM20TF-24H directly contributes to this goal through its low typical collector-emitter saturation voltage (VCE(sat)) of 2.2V at a 20A collector current. This low on-state voltage drop significantly reduces conduction losses, which are a major source of waste heat. A reduction in generated heat allows the engineer to specify a smaller, more cost-effective heatsink, directly shrinking the overall system footprint and bill of materials. While the CM20TF-24H is ideal for such 20A applications, for systems requiring greater current handling within a similar architecture, the CM50DY-24H provides a 50A capability.

Key Parameter Overview

Performance Benchmarks for Informed Design Decisions

The specifications of the CM20TF-24H are tailored for reliability and performance in demanding switching environments. The table below highlights key parameters derived from the official datasheet, with an emphasis on the values most critical for power electronics design.

Download the CM20TF-24H datasheet for detailed specifications and performance curves.

Technical Deep Dive

Inside the Trench Gate CSTBT™: Balancing Low VCE(sat) and Switching Performance

A defining feature of the CM20TF-24H is its foundation in Mitsubishi's CSTBT™ (Carrier Stored Trench-gate Bipolar Transistor) technology. This advanced chip structure is pivotal to achieving the module's low conduction losses. Unlike older planar IGBT designs, the trench-gate structure creates a vertical current path, increasing the channel density within the same silicon area. This alone reduces on-state resistance.

The "Carrier Stored" aspect adds another layer of optimization. It involves a special n-layer that acts as a reservoir for charge carriers. When the IGBT is switched on, this staging area allows for a rapid and dense flood of carriers into the drift region, further lowering the on-state voltage drop, or VCE(sat). Think of VCE(sat) as the "energy toll" the current must pay to travel through the switch. A lower VCE(sat) means a lower toll, resulting in less energy wasted as heat. The CSTBT™ design effectively creates a multi-lane superhighway for current, minimizing the traffic jams (resistance) and the toll (voltage drop) required for passage. This is fundamental to improving efficiency, a key focus in designs aiming to meet modern energy standards. For a deeper understanding of potential issues, reviewing resources on ensuring IGBT reliability can provide valuable context.

Frequently Asked Questions (FAQ)

How does the 2.7V maximum VCE(sat) of the CM20TF-24H influence thermal design?
The maximum VCE(sat) of 2.7V is the worst-case figure for calculating conduction losses (P_cond = VCE(sat) * Ic). Using this value ensures the thermal management system, including the heatsink, is sufficiently sized to keep the junction temperature below the 150°C maximum under all specified operating conditions, guaranteeing reliability.

What is the primary benefit of a single IGBT configuration in the CM20TF-24H?
A single IGBT module offers maximum design flexibility for engineers creating custom power topologies, such as individual phases of an inverter, chopper circuits, or boost/buck converters. It allows for optimized layouts to minimize stray inductance, which is more difficult to achieve with multi-IGBT integrated modules.

What are the typical gate drive requirements for this H-Series module?
While the datasheet specifies an absolute maximum gate-emitter voltage of ±20V, H-Series IGBTs are typically driven with a positive voltage of +15V for turn-on and a negative voltage between -5V to -15V for turn-off. A negative gate voltage ensures a robust turn-off and improves noise immunity, preventing parasitic turn-on. Detailed guidance can often be found in resources on mastering 1200V IGBTs in industrial inverters.

From a strategic standpoint, integrating the CM20TF-24H allows for the development of power conversion platforms that are not only efficient but also compact and cost-effective. Its adherence to a standard footprint provides a reliable component for both new designs and mid-life upgrades of existing systems, where improved thermal performance and energy savings are key objectives.