6MBI100S-120 Fuji Electric 1200V 100A 6-Pack IGBT Module

Content last revised on November 20, 2025

Fuji 6MBI100S-120: Engineering Analysis of a 1200V, 100A Six-Pack IGBT Module

An In-Depth Review for Power System Design Engineers

The Fuji Electric 6MBI100S-120 is a 1200V/100A six-pack IGBT module engineered for high-efficiency power conversion, delivering reduced conduction losses to optimize performance in demanding industrial applications. With key specifications of 1200V | 100A | VCE(sat) 2.2V (typ), this module offers robust thermal performance and simplified system integration. It directly addresses the engineering need for a reliable power stage in systems where balancing efficiency and thermal management is critical. For AC drives requiring predictable performance under heavy loads, its low saturation voltage is a defining advantage for minimizing heat dissipation.

Key Parameter Overview

Decoding the Specs for High-Efficiency Power Conversion

The technical specifications of the 6MBI100S-120 are foundational to its performance in power conversion systems. The following table highlights the critical parameters that directly influence design choices, from thermal management to gate drive configuration. A low collector-emitter saturation voltage (VCE(sat)) is particularly important as it directly correlates to lower conduction losses, a key factor in overall system efficiency.

Download the 6MBI100S-120 datasheet for detailed specifications and performance curves.

Application Scenarios & Value

System-Level Benefits in Industrial Motor Control and Power Supplies

The 6MBI100S-120 is best suited for applications where efficiency and reliability are paramount. Its six-pack configuration, containing six IGBTs and six free-wheeling diodes in a three-phase bridge, is purpose-built for three-phase AC motor control and power conversion systems.

A primary engineering challenge in designing a Variable Frequency Drive (VFD) is managing the heat generated by the power module, especially in compact enclosures. The 6MBI100S-120's typical VCE(sat) of 2.2V at its nominal 100A rating directly mitigates this issue. Think of VCE(sat) as the "voltage toll" the device charges when it's fully on; a lower toll means less energy is wasted as heat. This allows for smaller heatsink selection or operation at higher ambient temperatures without derating, contributing to a more compact and cost-effective final design. The module's performance is crucial for adhering to efficiency standards like IEC 61800-5 for adjustable speed drives.

Its application scope includes:

• AC Motor Drives and Servo Drives
• Uninterruptible Power Supplies (UPS)
• General Purpose Inverters
• Welding Power Supplies

For systems demanding higher current capacity, the related 2MBI200NB-120 offers a 200A rating within a similar voltage class.

Technical Deep Dive

Implications of the S-Series Trench Gate Structure

The performance of the 6MBI100S-120 is rooted in its S-Series chip technology from Fuji Electric. This generation utilizes a trench gate structure, a significant evolution from older planar gate designs. Imagine the current flow path in an IGBT like water flowing through a field. A planar gate is like a wide, shallow channel, while a trench gate is like a deep, narrow trench. The trench structure creates a more direct and lower-resistance path for the current, which is the physical mechanism that achieves the low VCE(sat) of 2.2V. This design not only reduces static conduction losses but also allows for a more optimized trade-off with switching losses, making the module effective across a range of Pulse Width Modulation (PWM) frequencies commonly used in industrial automation.

Frequently Asked Questions (FAQ)

How does the VCE(sat) of 2.2V (typ) influence thermal design?A lower VCE(sat) directly reduces power loss during conduction (P_loss = VCE(sat) * IC). With less power being converted to heat, the required performance from the cooling system is reduced. This allows engineers to specify a smaller, more cost-effective heatsink or to achieve higher power density within the same thermal envelope.

What is the primary function of the integrated Free Wheeling Diodes (FWD)?The integrated FWDs provide a safe path for the inductive motor current to flow when an IGBT turns off. This is essential in any inductive load application, such as a motor drive, to prevent catastrophic voltage spikes that would otherwise destroy the IGBT. The co-packaging of these diodes simplifies the power stage design significantly.

Is the 6MBI100S-120 suitable for hard-switching topologies?Yes, its specifications, including defined turn-on (Eon) and turn-off (Eoff) energies, are characterized for hard-switching applications. The datasheet provides curves to help engineers calculate switching losses at their specific operating frequency and conditions, which is crucial for overall loss budgeting.

What does the "six-pack" configuration mean for system integration?A "six-pack" or "6-in-1" module contains all six necessary IGBTs and FWDs to create a complete three-phase inverter bridge in a single package. This drastically simplifies PCB layout, reduces component count, minimizes stray inductance compared to discrete solutions, and streamlines the manufacturing assembly process.

Strategic Design Considerations

Integrating the 6MBI100S-120 module into a power system design offers a strategic path to achieving a balance of performance, thermal stability, and manufacturing simplicity. Its well-defined characteristics for losses allow for precise and predictable system modeling, reducing design cycle time. For engineering teams focused on developing reliable and efficient mid-power industrial inverters, this module provides a proven, integrated solution that minimizes both electrical and thermal design complexity.