7MBR25UA120 Fuji Electric 1200V 25A 7-in-1 IGBT Module (PIM)

Content last revised on July 5, 2026

Fuji Electric 7MBR25UA120: Engineering Insights into a 1200V 25A Integrated Power Module

An All-in-One Power Stage for Compact Drive Systems

The 7MBR25UA120 from Fuji Electric is an all-in-one power solution engineered to streamline the development of compact motor control systems. With core specifications of 1200V | 25A in a 7-in-1 PIM configuration, this module delivers two critical engineering benefits: it radically simplifies PCB layout and reduces the overall Bill of Materials (BOM). It achieves this simplification by integrating a three-phase converter, a three-phase inverter, and a dynamic brake chopper into a single, board-mountable component, eliminating the complexity of designing and assembling separate power stages. For low-power AC servo drives and general-purpose inverters up to 5.5 kW, this PIM is the optimal choice for accelerating time-to-market.

Key Parameter Overview

A Functional Breakdown for System Designers

The technical specifications of the 7MBR25UA120 are organized by its internal functions. This structure allows engineers to quickly assess the performance of each integrated section—Inverter, Brake, and Converter—and make informed decisions regarding system-level design and thermal management.

Application Scenarios & Value

Accelerating Development of Compact Servo and VFD Systems

The primary value of the 7MBR25UA120 lies in its ability to significantly reduce design complexity and physical footprint in low-power motion control applications. Consider an engineer developing a compact Servo Drive for a robotic arm or an automated packaging machine. The key challenge is integrating a full power stage—rectifier, brake circuit, and inverter—onto a small PCB without compromising thermal performance or reliability. This is where the module's 7-in-1 Power Integrated Module (PIM) architecture becomes a decisive advantage.

By housing all necessary power semiconductors in a single package, the 7MBR25UA120 replaces a multitude of discrete components. This immediately shrinks the required board space and simplifies the layout, reducing the potential for EMI issues arising from longer traces in a discrete solution. The low typical VCE(sat) of 2.2V directly translates to lower conduction losses, which means less waste heat. This thermal efficiency allows the use of a smaller, more cost-effective heatsink, further contributing to the overall system's compactness. The result is a faster design cycle, a lower component count, and a more reliable final product.

For systems requiring higher current handling within a similar integrated framework, the 7MBR50UA120-50 offers a 50A capacity. Conversely, for applications operating on lower bus voltages, a 600V PIM like the 7MBR50SA060 may provide a more optimized solution.

Frequently Asked Questions

Engineering-Focused Questions & Answers

What is the primary benefit of the 7-in-1 PIM configuration in the 7MBR25UA120?

The key benefit is system integration. It combines the AC-to-DC converter, the dynamic braking chopper, and the DC-to-AC inverter into one package, which drastically reduces the physical footprint, simplifies the PCB layout, and lowers the manufacturing assembly cost compared to using separate components.

How does the typical VCE(sat) of 2.2V impact the thermal design of a motor drive?

A lower VCE(sat) signifies lower power loss during conduction. This means the IGBT generates less heat for a given current, which simplifies the thermal design. Engineers can specify a smaller, lighter, and less expensive heatsink while maintaining a safe operating temperature, which is critical for achieving high power density in compact drive systems.

What is the purpose of the integrated thermistor and how should it be used?

The integrated NTC thermistor provides a means for real-time temperature monitoring of the module's substrate. It should be connected to the control circuit's analog input to enable over-temperature protection. This feature is crucial for preventing thermal runaway and enhancing the long-term reliability of the entire drive system.

Technical Deep Dive

A Closer Look at the U-Series PIM Architecture and Its System-Level Advantages

The architecture of the 7MBR25UA120 is more than just a space-saving measure; it offers tangible electrical and thermal benefits. By placing all semiconductor dies on a common, electrically isolated baseplate, the module ensures superior thermal tracking between the different functional blocks. This means the inverter, converter, and brake components operate in a more consistent thermal environment, which improves the accuracy of system-wide thermal models and enhances protection schemes.

Furthermore, this integrated layout significantly reduces the parasitic inductance that is inherent in discrete designs with long PCB traces or bus bars connecting different power stages. Lower internal inductance minimizes voltage overshoots during high-speed switching events, leading to improved reliability and reduced electromagnetic interference (EMI). Think of it as the power electronics equivalent of a System-on-Chip (SoC) versus a motherboard with multiple discrete ICs and cables; the PIM architecture provides a cleaner, more reliable, and more compact power core for the application.

For engineers and procurement managers, the value proposition is clear. The 7MBR25UA120 allows for the design of more robust and compact systems with an accelerated development timeline. By specifying a single, highly integrated component, teams can focus on control logic and software, confident that the power stage is optimized for performance and manufacturability.