QM30HA-H Mitsubishi 600V 30A Single Switch IGBT Module

Content last revised on February 5, 2026

QM30HA-H IGBT Module: 600V, 30A Single Switch for Robust Industrial Power Control

The QM30HA-H is a highly reliable single-switch IGBT module from Mitsubishi's H-Series, engineered for sustained performance in demanding industrial power conversion systems. It delivers a robust specification of 600V | 30A | Viso 2500Vrms, offering key benefits such as simplified thermal management and maximum design flexibility. Its integrated isolated baseplate allows direct mounting to a heatsink, which streamlines assembly and enhances overall thermal performance. For cost-sensitive servo drives and welders operating on 240V lines, this module offers a proven, reliable switching solution.

Application Scenarios & Value

Engineering Reliable Power Stages in Industrial Automation and Welding

The QM30HA-H is strategically engineered for medium-power applications where long-term reliability and ease of maintenance are paramount. Its design is particularly advantageous in systems such as small-scale Variable Frequency Drives (VFDs), industrial welding power supplies, and general-purpose switching power converters. What is the primary benefit of its integrated isolation? It simplifies thermal design and boosts system reliability.

Consider the engineering challenge of ensuring operational longevity in a compact motor drive enclosure, where thermal stress is a primary failure vector. The QM30HA-H directly addresses this with its 2500Vrms electrically isolated baseplate. This feature eliminates the need for separate, often fragile, thermal insulation pads between the module and the heatsink. This simplification of the heatsink design not only reduces assembly time and component count but, more critically, creates a more efficient and consistent thermal pathway. The result is lower operating temperatures and a significant enhancement in the service life of the power stage. This module's single-switch topology also makes it an ideal component for flexible designs, including DC chopper circuits and custom inverter legs.

While the QM30HA-H is optimized for 30A systems, for applications demanding higher current capacity within the same voltage class, the QM150DY-H provides a 150A rating. For systems requiring higher blocking voltage, the 1200V CM300HA-12H offers an alternative path.

Key Parameter Overview

Critical Specifications for System Design and Integration

The following parameters for the QM30HA-H are fundamental for accurate system modeling, thermal management, and ensuring operation within the specified Safe Operating Area (SOA). The highlighted values are central to its application performance.

Download the QM30HA-H datasheet for detailed specifications and performance curves.

Frequently Asked Questions

Engineering Questions on Implementation and Performance

What are the main advantages of the QM30HA-H's single-switch configuration?
The single-switch, or "1-in-1," topology provides maximum design flexibility. Engineers can use individual QM30HA-H modules as building blocks to create custom power circuits, such as buck or boost converters (choppers), single legs of an inverter bridge, or more complex arrangements. This is analogous to using a universal component like a single LEGO brick; it allows for the construction of a precisely tailored solution rather than being constrained by a pre-configured module.

How does the 2500Vrms isolation voltage simplify mechanical and thermal design?
The integrated isolation means the module's metal baseplate is electrically insulated from the internal semiconductor chips. This allows the module to be mounted directly onto a grounded heatsink without any additional insulating layers like mica or silicone pads. This simplification reduces assembly steps, lowers parts count, and, most importantly, eliminates a layer of thermal resistance. This leads to a more effective and reliable thermal path from the IGBT junction to the ambient environment.

With a typical VCE(sat) of 2.2V, what is the best approach for managing conduction losses?
Effective thermal management is key. The conduction loss, calculated as VCE(sat) multiplied by the collector current, must be efficiently dissipated as heat. The specified maximum Rth(j-c) of 0.73 °C/W is a critical parameter for this. A properly sized heatsink, potentially with forced air cooling, should be selected to ensure the junction temperature (Tj) remains well within the maximum limit of 150°C under worst-case operating conditions. For practical guidance, refer to our guide on preventing IGBT failure modes.

Technical Deep Dive

A Closer Look at the Isolated Baseplate and its Impact on System Longevity

The reliability of a power module is not just a function of its silicon, but also its mechanical and thermal construction. The QM30HA-H's use of an internally isolated baseplate is a deliberate design choice aimed at enhancing long-term operational stability. In contrast to non-isolated modules that require an external insulating pad, the integrated design provides a controlled, factory-guaranteed dielectric strength and a predictable thermal interface.

Think of the thermal path from the silicon chip to the heatsink. Using an external insulator is like wearing a thick, ill-fitting coat on a warm day—it provides protection but traps heat inefficiently and can be prone to damage. The QM30HA-H's integrated isolation is more like a high-performance athletic fabric woven directly into a shirt. It provides the necessary electrical isolation while being engineered for maximum thermal transfer, effectively wicking heat away from the source. This eliminates the risk of installation errors, such as cracked insulators or contamination, which can create thermal hotspots and lead to premature device failure. This robust approach is a cornerstone of the H-Series' reputation in industrial fields.

For applications where proven robustness and straightforward thermal design are prioritized over achieving the lowest possible switching losses, the QM30HA-H represents a sound strategic choice. It is particularly well-suited for the maintenance of legacy industrial equipment or for new designs in moderate-frequency applications that demand a high degree of reliability and simplified assembly.