Content last revised on March 22, 2026
Mitsubishi PM75RL1A120 | The Integrated Power Solution for Compact Motor Drives
The Mitsubishi PM75RL1A120 is an intelligent power IGBT module engineered to streamline the design and enhance the reliability of low-to-medium power motion control systems. By integrating a full three-phase converter, inverter, and brake (CIB) circuit into a single, compact package, this module provides a robust foundation for building high-performance drives while minimizing complexity and assembly costs.
Engineered for Efficiency in Demanding Applications
The true value of the PM75RL1A120 lies in its ability to solve core engineering challenges across various industrial applications. Its highly integrated nature is not just a feature—it's a direct solution for space-constrained and cost-sensitive designs.
- Industrial Motor Drives: For general-purpose Variable Frequency Drives (VFDs) powering pumps, fans, and conveyors, the PM75RL1A120 drastically reduces the bill of materials (BOM) and simplifies the power stage layout. This leads to faster assembly times and a smaller overall drive footprint, a critical advantage in crowded control cabinets.
- Servo Drives: In precision applications like robotics and CNC machinery, the module's compact design and optimized internal layout contribute to lower parasitic inductance. This enables cleaner switching, improved control loop performance, and the high-fidelity power delivery required for precise motion. For more on this, see our guide to IGBTs in robotic servo drives.
- Uninterruptible Power Supplies (UPS): The module's inherent reliability, stemming from fewer discrete components and solder joints, makes it an excellent choice for UPS systems where uptime and dependability are non-negotiable.
A Closer Look at the Engineering Inside
Two key design elements set the Mitsubishi PM75RL1A120 apart: its CIB topology and its integrated thermal sensing capabilities. Understanding these is key to leveraging the module's full potential.
- CIB (Converter-Inverter-Brake) Integration: This Power Integrated Module, or PIM, consolidates the AC-to-DC rectifier, the DC-link braking chopper, and the DC-to-AC three-phase inverter. This architecture eliminates multiple external power components and their interconnects, which inherently reduces stray inductance and capacitance. The practical benefit for engineers is simplified EMC/EMI filtering design and a more robust power stage that is less susceptible to noise.
- Integrated NTC Thermistor: The module includes a built-in Negative Temperature Coefficient (NTC) thermistor positioned close to the IGBT chips. This provides a direct, real-time measurement of the module's baseplate temperature, enabling precise and fast-acting over-temperature protection. This feature is critical for preventing thermal runaway and is a cornerstone of robust system design, helping to avoid common causes of IGBT failure.
Mitsubishi PM75RL1A120 at a Glance
This table provides a quick reference for the module's primary electrical characteristics, essential for initial design considerations.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (VCES) | 1200 V |
| Collector Current (IC) | 75 A |
| Collector-Emitter Saturation Voltage (VCE(sat)) @ IC=75A | 2.7 V (Max) |
| Forward Voltage Diode (VF) @ IF=75A | 2.6 V (Max) |
| Operating Junction Temperature (Tj(op)) | -20 to +150 °C |
| Package Type | L1-Series |
For a complete list of specifications and performance curves, you can download the official datasheet here.
Expert Answers to Common Engineering Questions
Our power electronics specialists frequently address these key design considerations.
For applications typically below 15 kW, a PIM offers a compelling advantage in terms of power density, assembly simplicity, and procurement. While a discrete design allows for more customization of individual components (e.g., using ultra-fast diodes), the PIM's pre-optimized, integrated layout often results in a lower total cost of ownership and faster time-to-market.
Extremely critical. A well-designed gate drive circuit is essential for reliability. We recommend using a driver with robust short-circuit protection (desaturation detection) and providing a negative turn-off voltage (e.g., -5V to -15V). This ensures the IGBTs remain securely off, even in the presence of high dV/dt, preventing parasitic turn-on and potential shoot-through events.
If your project demands a compact, reliable, and cost-effective power stage for motor control or power conversion, the Mitsubishi PM75RL1A120 presents a clear engineering advantage. For detailed application support or to discuss your specific design needs, please contact our technical team.
