Content last revised on June 4, 2026
Mitsubishi QM300HH-2H 1000V 300A Dual IGBT Module
The Mitsubishi QM300HH-2H is a high-performance, insulated-type dual IGBT module designed for heavy-duty industrial switching applications. Featuring a robust 1000V collector-emitter voltage and a 300A collector current rating, this half-bridge configuration empowers engineers to manage high-power loads with exceptional switching efficiency and thermal stability. Its low drive power requirements and optimized saturation voltage make it a cornerstone for reliability in power conversion systems. For engineers prioritizing thermal margins in high-duty environments, this 1000V 300A module is the optimal choice.
Top Specifications: 1000V | 300A | Insulated Case
- Key Benefits: Reduced conduction losses via low VCE(sat) and simplified gate drive design.
- Core Problem Solved: Addresses the challenge of high-frequency switching losses in 400V-600V industrial AC lines.
What is the primary benefit of its insulated housing? It provides a 2500V AC isolation rating, allowing multiple modules to be mounted on a single heatsink without electrical interference.
Application Scenarios & Value
Achieving System-Level Efficiency in Industrial Motor Control
Engineers often face the critical challenge of managing heat dissipation in Variable Frequency Drive (VFD) systems operating under continuous peak loads. The QM300HH-2H solves this by maintaining a low VCE(sat), which directly reduces the heat generated during the conduction phase. For instance, in a high-torque industrial conveyor system, the 300A current capability ensures the module handles the initial motor drive surge currents without triggering over-temperature faults.
This module is particularly effective in Uninterruptible Power Supply (UPS) and large-scale Solar Inverter stages where energy density is paramount. By utilizing the QM300HH-2H, designers can reduce the size of the required cooling infrastructure. While this model is ideal for standard 1000V requirements, for systems necessitating higher voltage headroom in 1200V environments, the related CM300DY-24H offers an alternative voltage rating for 690V line architectures. Effective thermal management remains the linchpin of long-term reliability in these high-power deployments.
Technical & Design Deep Dive
Advanced Switching Dynamics and Conduction Loss Optimization
The internal architecture of the QM300HH-2H is optimized to balance switching speed with ruggedness. One of its defining characteristics is the low gate charge requirement, which allows for the use of smaller, more cost-effective Gate Drive circuits. To understand VCE(sat), imagine a water valve in a high-pressure pipe; the saturation voltage represents the pressure drop across that valve when it is fully open. A lower drop means less energy is wasted as heat, ensuring more power reaches the industrial load.
Furthermore, the high-speed switching capability minimizes the "energy per pulse" loss during transitions. This is critical in Welding Power Supply applications where high-frequency operation (typically above 20kHz) is necessary to maintain a stable arc. To prevent catastrophic failures in these stressful environments, engineers must implement robust protection against overcurrent and overvoltage conditions, as detailed in our guide on preventing IGBT failure modes. The module's internal diode also features fast recovery characteristics, reducing electromagnetic interference (EMI) during high-frequency commutation.
Key Parameter Overview
Functional Specification Grouping for Enhanced System Design
| Electrical Ratings (at Tc = 25°C unless specified) | |
|---|---|
| Collector-Emitter Voltage (VCES) | 1000V |
| Collector Current (IC) | 300A |
| Collector Dissipation (Pc) | 2100W |
| Collector-Emitter Saturation Voltage | 2.7V (Typical) |
| Thermal and Mechanical Characteristics | |
| Isolation Voltage (Viso) | 2500V AC (1 min) |
| Operating Junction Temperature (Tj) | -40 to +150°C |
| Thermal Resistance (Rth j-c) | 0.06°C/W |
| Configuration | Dual (Half-Bridge) |
Download the QM300HH-2H datasheet for detailed specifications and performance curves.
Technical FAQ
How does the low thermal resistance (Rth j-c) of 0.06°C/W influence heatsink selection?
The exceptionally low Thermal Resistance of 0.06°C/W allows for highly efficient heat transfer from the silicon junction to the module's baseplate. For designers, this means that even under a continuous 300A load, the required heatsink can be smaller or the fan speed can be reduced compared to modules with higher resistance, directly increasing system power density.
Is the QM300HH-2H suitable for high-frequency induction heating applications?
Yes. While the QM300HH-2H is traditionally used in motor drives, its optimized switching times (ton/toff) enable it to perform reliably in induction heating stages where frequencies range from 10kHz to 30kHz. However, designers must ensure a low-inductance Snubber Circuit is used to suppress voltage spikes during fast turn-off events at 1000V.
For technical procurement and engineering support regarding the Mitsubishi QM300HH-2H, consult with our specialists to verify system compatibility and thermal design margins. Our team provides data-backed insights to support your IGBT Module evaluation and deployment strategy.
