7MBR10SA120J-70 Fuji Electric 1200V 10A 7-in-1 IGBT Module

Content last revised on December 11, 2025

7MBR10SA120J-70: Fuji Electric 1200V 10A 7-in-1 PIM IGBT Module

The 7MBR10SA120J-70 is a highly integrated Power Integrated Module (PIM) designed to maximize efficiency and minimize the design footprint in low-power motor control systems. Featuring a **1200V** | **10A** | **7-in-1 PIM** configuration, this module delivers key benefits such as reduced conduction losses and simplified circuit design. It effectively simplifies Variable Frequency Drive (VFD) development by consolidating the rectifier, brake, and inverter stages into a single, compact PCB-mountable package. For space-constrained motor drives up to approximately 2.2 kW that require a high degree of integration, this 10A PIM represents an optimal design choice.

Application Scenarios & Value

System-Level Benefits in Compact AC Servo and VFD Designs

The 7MBR10SA120J-70 is engineered to address the core challenges of density and efficiency in modern, low-power motion control systems. Its primary application is in compact **Variable Frequency Drives (VFDs)**, **AC Servo Drive amplifiers**, and small Uninterruptible Power Supplies (UPS). In these applications, engineers are often tasked with delivering robust performance from within a small, often sealed, enclosure where thermal management and PCB real estate are primary constraints.

Consider the design of a compact AC servo drive for an automated packaging machine. The drive must be small enough to be mounted near the motor, yet powerful enough to handle dynamic loads. Here, the integrated **7-in-1 PIM** architecture of the 7MBR10SA120J-70 provides a decisive advantage. By combining the three-phase input rectifier, brake chopper, and three-phase inverter into a single component, it eliminates the need for multiple discrete devices. This consolidation drastically reduces the required PCB footprint and simplifies the assembly process, directly contributing to a smaller and more cost-effective drive. Furthermore, the module's low collector-emitter saturation voltage (**VCE(sat)**) of 2.2V (typical at 10A, 125°C) minimizes conduction losses. This is not just an efficiency gain; it means less waste heat is generated, easing the burden on the cooling system and enhancing the system's overall reliability. For systems that demand higher current handling for more powerful motors, the related 7MBR25SA120-50 offers a similar integrated topology with a 25A current rating.

Technical Deep Dive

A Closer Look at the Trade-off Between Integration and Thermal Performance

The high level of integration in the 7MBR10SA120J-70 exemplifies a key trend in power electronics: functional density. Consolidating a full three-phase drive system into one module is analogous to creating a system-on-chip (SoC) for power; it reduces parasitic inductance between stages, which can lead to better EMI performance and simplified layout. However, this integration also concentrates heat generation into a small area, presenting a thermal management challenge.

Fuji Electric addresses this challenge through a multi-faceted approach within the module's design. The most critical element is the use of IGBTs with a low **VCE(sat)**. Think of VCE(sat) as a measure of electrical friction; the lower the value, the less energy is wasted as heat when the switch is on. By optimizing the IGBTs for low conduction losses, the module inherently produces less heat for a given load current. This design choice is fundamental to making the PIM concept viable in a compact, PC board-mounted package. Complementing this is the integrated **NTC thermistor**, which provides a direct, real-time measurement of the module's substrate temperature. This allows the drive's control system to implement precise over-temperature protection or to dynamically scale back performance if thermal limits are approached, acting as an essential safeguard for ensuring long-term operational reliability.

Key Parameter Overview

Key Specifications and Their Engineering Implications

The performance of the 7MBR10SA120J-70 is defined by several key parameters that directly influence its application suitability and system-level performance. Understanding these specifications is crucial for design engineers to fully leverage the module's capabilities.

Frequently Asked Questions (FAQ)

Engineering Questions on the 7MBR10SA120J-70

How does the low VCE(sat) of the 7MBR10SA120J-70 impact thermal design in a sealed drive?

The low VCE(sat) directly reduces conduction power loss (P = VCE(sat) * IC). In a sealed, non-ventilated enclosure, where heat dissipation is limited, this reduction is critical. It lowers the overall heat generated by the module, potentially allowing for a smaller heatsink or even passive cooling, thereby increasing power density and reliability.

What are the main design advantages of using a 7-in-1 PIM configuration?

The primary advantages are simplification and miniaturization. A 7-in-1 Power Integrated Module (PIM) reduces the bill of materials (BOM), shrinks the required PCB area, and shortens the design and assembly cycle. It also minimizes stray inductance between the rectifier, brake, and inverter stages, which can improve electrical performance and reduce EMI.

What is the function of the integrated NTC thermistor in this module?

The integrated NTC (Negative Temperature Coefficient) thermistor acts as a temperature sensor. It provides a resistance value that corresponds to the module's internal temperature, allowing the motor drive's controller to monitor thermal conditions in real-time for over-temperature protection, which is vital for preventing component failure.

How does the PC board mount design affect manufacturing and reliability?

The PC board mount design allows for automated soldering processes (like wave or selective soldering), reducing manual labor and improving consistency compared to chassis-mount modules that require screw terminals and wiring. This leads to lower manufacturing costs and can enhance reliability by minimizing potential connection faults.

What is the typical power range this 10A module is suitable for in VFD applications?

For a standard 400V AC input, this 10A module is generally suitable for three-phase motor applications ranging from 1.5 kW to 2.2 kW, depending on the load profile, cooling efficiency, and required overload capacity. It's an ideal fit for the low-power end of the industrial drive spectrum.

From an Engineer's Perspective

For designers of compact motion control systems, the 7MBR10SA120J-70 is less a component and more a subsystem solution. Its value lies not just in its individual specifications but in how they synergize to solve system-level problems. The integration of a full drive topology into a single PCB-mount package drastically simplifies the hardware design, while the focus on low conduction losses and integrated thermal feedback directly addresses the reliability concerns inherent in high-density power designs. This module enables the development of smaller, more efficient, and more cost-effective drives without compromising on the protective features required for robust industrial operation. For further reading on managing heat in such designs, a deep dive into mastering IGBT thermal management can provide valuable context.