6MBI8F-120 Fuji Electric 1200V 8A Six-Pack IGBT Module

Content last revised on November 29, 2025

Engineering Analysis of the 6MBI8F-120: A Compact Powerhouse for Motion Control

An Integrated Solution for Compact, Low-Power Inverter Designs

The Fuji Electric 6MBI8F-120 is an intelligently integrated IGBT module engineered to streamline the development of low-power three-phase inverter systems. It consolidates a full six-pack power stage into a single component, offering key specifications of 1200V and 8A. This level of integration delivers tangible engineering benefits, including simplified PCB layouts and reduced assembly complexity. For applications like small servo drives or compact motor controllers, this module provides a robust and space-efficient power core. For engineers designing compact AC servo drives where board space is at a premium, the integrated nature of the 6MBI8F-120 offers a distinct advantage over discrete component solutions.

Key Parameter Overview

Decoding the Specs for Simplified System Design

The technical specifications of the 6MBI8F-120 are tailored for efficiency and reliability in low-power motor control applications. The parameters below highlight its capabilities as a cornerstone for compact inverter designs.

Download the 6MBI8F-120 datasheet for detailed specifications and performance curves.

Application Scenarios & Value

Achieving High Power Density in Compact Motion Control Systems

The 6MBI8F-120 is purpose-built for applications where space is a critical constraint and a full three-phase inverter is required. Its primary value is realized in systems operating on 380V to 480V AC lines, where its 1200V rating provides essential voltage headroom for safe and reliable operation.

A high-fidelity engineering scenario for this module is the development of a compact, distributed AC servo drive for robotic arms or automated guided vehicles (AGVs). In such designs, minimizing the drive's physical footprint is paramount. By integrating six IGBTs and six FWDs into a single module, the 6MBI8F-120 eliminates the need for 12 separate discrete components. This significantly simplifies the PCB layout, reduces manufacturing complexity, and minimizes potential points of failure associated with solder joints and interconnects. The module's collector-emitter saturation voltage (VCE(sat)) of 2.8V max directly impacts conduction losses. Think of VCE(sat) as the "toll" the current pays to pass through the switch; a lower toll means less energy is wasted as heat, contributing to better overall drive efficiency. While this module is optimized for low-power applications, for systems demanding higher current, the related BSM50GP60 offers a higher current rating within a similarly integrated package.

Application Vignette

Case Study: Enabling a Next-Generation Compact Servo Drive

The Challenge: An engineering team is tasked with designing a new generation of servo drives for a multi-axis CNC machine. A key project requirement is to reduce the size of the drive housing by 30% to allow for more flexible machine integration, without compromising on reliability or performance for small, precision motors.

The Solution: The team selects the Fuji Electric 6MBI8F-120. The traditional approach using discrete IGBTs and diodes would require significant PCB real estate for the twelve power components, plus their associated gate drive circuitry and spacing for thermal and electrical isolation. The 6MBI8F-120, with its six-pack topology in a compact M626 package, consolidates the entire three-phase bridge. This immediately frees up considerable board space. The concept of power density—packing more power processing capability into a smaller volume—is crucial here. The module's integrated design is like having a pre-assembled engine core; instead of building it from individual pistons and valves, you install one highly optimized unit, drastically simplifying the overall machine's construction.

System-Level Benefits: By leveraging the module's high integration, the team successfully reduces the PCB footprint for the power stage by over 50%. This reduction is instrumental in achieving the 30% smaller housing target. Furthermore, the simplified assembly process lowers manufacturing costs and the reduced number of interconnects contributes to a more reliable system, a critical factor in high-availability industrial machinery. The module's thermal characteristics, while modest, are well-defined, allowing for predictable and efficient heatsink design for the target 8A output.

Frequently Asked Questions

How does the integrated six-pack design of the 6MBI8F-120 benefit my servo drive design?
The integrated design significantly reduces component count by replacing 12 discrete power devices (six IGBTs and six FWDs) with a single module. This simplifies PCB layout, shrinks the overall solution size, reduces assembly costs, and enhances system reliability by minimizing solder joint connections.

What is the significance of the 1200V rating for a low-current 8A module?
The 1200V VCES rating provides substantial safety margin for inverters operating on 380V to 480V three-phase AC lines. This robustness is critical for handling voltage transients and ensuring long-term reliability in demanding industrial environments, even in lower-power Variable Frequency Drive (VFD) applications.

Is the VCE(sat) of 2.8V competitive for this device class?
A VCE(sat) of 2.8V (max) at the nominal 8A current represents a balanced trade-off between conduction losses and the high voltage blocking capability of a 1200V device. It is engineered to provide reliable performance and manageable thermal load in the compact, low-power applications for which this module is intended, such as motion control and small motor drives.

For engineering teams seeking to optimize the size and simplify the design of their next low-power inverter or servo drive, the 6MBI8F-120 offers a compelling, highly integrated solution. To discuss how this module can fit into your specific application, please contact our technical sales team for a consultation.