PM15RHB120 Mitsubishi 1200V 15A Intelligent Power Module (IPM)

Content last revised on June 23, 2026

PM15RHB120 Mitsubishi 1200V 15A Intelligent Power Module (IPM)

The PM15RHB120, a flagship member of the Mitsubishi R-Series Intelligent Power Module family, represents a sophisticated integration of power switching and control logic. By combining a three-phase inverter bridge and a brake chopper circuit with dedicated gate drive and protection functions, this IPM enables a Switching Efficiency & Loss Reduction strategy that is often unachievable with discrete IGBT designs. For low-power 400V AC motor drives where rapid prototyping and high thermal stability are paramount, the PM15RHB120 stands as a robust, integrated solution.

Top Specifications: 1200V | 15A | Integrated Gate Drive & Protection

Key Benefits: Minimizes parasitic inductance for cleaner switching; simplifies PCB layout by 40%.

A primary concern for engineers is how to reduce switching losses in 1200V low-power motor drives. The PM15RHB120 addresses this by utilizing an internal gate driver specifically tuned to the silicon’s characteristics, virtually eliminating the loop area between the driver and the IGBT chip, which significantly reduces electromagnetic interference (EMI) and switching transients.

Application Scenarios & Value

Addressing Thermal Dissipation and PCB Constraints in Compact Inverters

Engineers often face the challenge of reconciling high-voltage switching reliability with the spatial constraints of modern industrial control cabinets. In applications such as precision Servo Drives and small-scale Variable Frequency Drives (VFD), every square millimeter of PCB real estate is valuable. The PM15RHB120 consolidates seven IGBTs (six for the inverter and one for the brake) and their respective free-wheeling diodes into a single, thermally optimized package.

Consider the design of a Servo Drive used in robotic arms. High-frequency PWM switching is required for smooth motion control, but this typically introduces significant switching losses. The PM15RHB120 provides a balanced 1200V 15A rating, allowing it to handle the back-EMF and regenerative braking energy characteristic of dynamic motor loads without requiring oversized heatsinks. This module is particularly effective in systems requiring compliance with IEC 61800-3 EMC standards, as the integrated drive logic reduces high-frequency noise at the source.

While this 15A model is ideal for compact automation units, systems requiring substantially higher current handling for heavy machinery may consider the PM150CVA120-2, which offers a 150A rating within the same 1200V class. Integrating the PM15RHB120 allows procurement teams to streamline their bill of materials (BOM), moving away from the complexities detailed in our guide on IPM vs. Discrete IGBTs.

Technical & Design Deep Dive

Decoding the Integrated Drive Logic for Reduced Parasitic Interference

The internal architecture of the PM15RHB120 is what justifies its "Intelligent" designation. Unlike standard IGBT Modules, which require external isolation and gate resistors, this IPM contains an application-specific integrated circuit (ASIC) that manages the Gate Drive requirements. This internal driver ensures that the IGBT is always operated within its Safe Operating Area (SOA), preventing the desaturation issues often caused by improper external gate resistance selection.

To understand the impact of conduction losses, engineers look at the saturation voltage, Vce(sat). Think of Vce(sat) as a narrow valve in a water pipe; even when fully open, it restricts some flow, causing a pressure drop. In the PM15RHB120, the Vce(sat) is meticulously controlled. If the valve is too narrow (high resistance), the pipe heats up and may burst (thermal runaway). By keeping this "pressure drop" low and consistent through integrated control, the module maintains a high Power Cycling Capability.

Furthermore, the module incorporates a dedicated Brake Chopper. In industrial VFD applications, deceleration causes the motor to act as a generator, pumping energy back into the DC link. The integrated brake IGBT in the PM15RHB120 allows for the direct connection of an external resistor to dissipate this excess energy, protecting the DC-link capacitors from overvoltage without requiring external power transistors.

Key Parameter Overview

Electrical and Protection Specifications for System-Level Benchmarking

Download the PM15RHB120 datasheet for detailed specifications and performance curves.

Frequently Asked Questions

How does the integrated gate drive in the PM15RHB120 impact total system reliability compared to discrete designs?
By integrating the Gate Drive, the PM15RHB120 eliminates the risks associated with parasitic oscillation and improper gate voltage levels. It ensures that the transition between states is optimized for the specific silicon die, reducing the Switching Loss and significantly increasing the Mean Time Between Failures (MTBF) by centralizing fault detection for short circuits and under-voltage conditions.

What specific advantages does the 1200V Vces rating provide in 400V industrial network applications?
A 1200V rating provides a critical safety margin for 400V or 480V AC line systems. In these environments, transient overvoltages and inductive "kickback" from the motor can easily exceed 800V. The PM15RHB120 offers sufficient overhead to survive these spikes without needing extensive Snubber Circuit designs, ensuring long-term durability in unpredictable industrial power grids.

Selecting the right IPM requires a deep understanding of the interplay between switching frequency and thermal management. As a distributor, we provide the technical data necessary for your engineering team to validate the PM15RHB120 for your specific power conversion architecture. For detailed integration support, consult Mitsubishi CSTBT™ technology resources or reach out for current technical documentation.