1MI100H-025 | Fuji 250V 100A Single IGBT Module | Engineering Overview
An In-Depth Technical Review for Power System Engineers
Content last revised on October 11, 2025.
The Fuji Electric 1MI100H-025 is a single IGBT module providing a fundamental building block for custom low-voltage, high-current power conversion circuits. It delivers a straightforward design element with core specifications of 250V Vces | 100A Ic | Single IGBT Configuration. Key engineering benefits include complete design flexibility for custom topologies and robust current handling for demanding loads. For engineers working on legacy equipment or specialized DC power systems, this module provides a discrete high-current switching solution. Best fit for maintaining legacy low-voltage motor drives or prototyping custom DC chopper circuits requiring high current capacity.
Key Parameter Overview
Core Electrical Ratings for Power Switching Design
The specifications of the 1MI100H-025 define its operational window for power electronic designs. The table below outlines the key parameters and their direct engineering implications, following a specifications-plus-value interpretation format. Understanding these limits is the first step in successful system integration.
| Parameter | Value | Engineering Interpretation & Significance |
|---|---|---|
| Collector-Emitter Voltage (VCES) | 250V | This is the maximum voltage the device can safely block when in the 'off' state. Think of it as the 'pressure rating' of a valve; exceeding it can lead to device failure. This rating makes the module suitable for low-voltage DC bus systems, such as those powered by 48V to 72V battery arrays. |
| Continuous Collector Current (IC) | 100A | Represents the maximum continuous DC current the IGBT can handle at a specified case temperature. This high current rating is critical for applications like DC motor controllers and welding power supplies where substantial current is required to drive the load. |
| Configuration | Single IGBT | The module contains one IGBT switch. This provides maximum flexibility for designers to create their own circuit topologies (e.g., chopper, half-bridge) and to implement custom gate drive and protection schemes, unlike integrated multi-switch modules. |
| Gate-Emitter Voltage (VGES) | ±20V | Defines the maximum allowable voltage between the gate and emitter terminals. Applying a voltage outside this range can permanently damage the internal gate oxide layer, leading to loss of control over the switch. Adherence to this rating is a primary focus of robust gate drive design. |
Application Scenarios & Value
System-Level Benefits in Low-Voltage, High-Current Topologies
The 1MI100H-025 is particularly well-suited for a distinct class of power conversion systems where low voltage and high current are the defining operational characteristics. Its architecture offers specific advantages in applications that demand robust, direct control over a single power rail.
A high-fidelity engineering scenario is the design of a DC motor controller for material handling equipment, such as an electric forklift operating on a 72V battery bus. The primary challenge is managing the high inrush and operational current of the traction motor. The 1MI100H-025's 100A continuous current rating provides the necessary capacity to handle these loads effectively. What is the primary benefit of its discrete design here? It allows the engineer to construct a simple and rugged DC chopper circuit, using Pulse Width Modulation (PWM) to precisely regulate motor speed and torque. This configuration simplifies both the control logic and the thermal management strategy, as the heat from a single, powerful switch is concentrated in one location.
While the 1MI100H-025 is tailored for low-voltage DC systems, applications requiring direct connection to 400V/575V AC lines would utilize a module with a higher blocking voltage, such as the 2MBI200NB-120, which offers a 1200V rating.
Technical Deep Dive
Harnessing the Flexibility of a Single IGBT Configuration
Unlike complex Intelligent Power Modules (IPMs) or multi-switch modules that offer a pre-packaged inverter stage, the 1MI100H-025 provides a single, discrete switch. This fundamental difference is its greatest design strength. The best analogy is building with individual LEGO bricks versus using a large, pre-formed component. The pre-formed piece is faster for a specific purpose, but the individual brick offers near-limitless creative potential.
This "brick" approach grants the design engineer several advantages:
- Topological Freedom: Engineers are not locked into a half-bridge or three-phase bridge. They can readily implement less common but highly effective topologies like buck-boost converters, DC-DC choppers, or phase-shifted full-bridges.
- Simplified Paralleling: For applications demanding current beyond 100A, multiple 1MI100H-025 modules can be paralleled. While this requires careful attention to PCB layout for current sharing and symmetrical gate drive signals, it provides a scalable path to higher power output.
- Customized Protection: Designers have direct access to the device terminals, allowing for the implementation of tailored snubber circuits, gate protection, and desaturation detection specific to the application's unique transient conditions.
This level of control is essential in specialized industrial equipment, research and development platforms, and for maintenance and repair of legacy systems where a direct, form-fit functional replacement is required.
Frequently Asked Questions
Engineering Considerations for the 1MI100H-025
What is the main advantage of a 'single IGBT' configuration like the 1MI100H-025?
The primary advantage is design flexibility. It allows engineers to create custom power circuit topologies outside of standard half-bridge or six-pack configurations, providing a fundamental building block for specialized applications like high-current DC chopper circuits or for paralleling to achieve higher current ratings.
Is the 250V Vces rating suitable for modern AC industrial motor drives?
No, this module is not intended for direct-on-line AC drives, which typically operate from 230V, 400V, or 480V AC sources and require IGBTs with much higher voltage ratings (e.g., 600V, 1200V). The 1MI100H-025 is designed specifically for low-voltage DC applications, such as battery-powered systems.
Given its legacy status, what is the primary use case for the 1MI100H-025 today?
Its primary use case is in the maintenance, repair, and overhaul (MRO) of existing industrial equipment that was originally designed with this component. Additionally, it serves as a robust option for new designs in niche, low-voltage, high-current applications like DC-DC converters, battery chargers, and specialized welding power supplies.
What are the key considerations when designing a gate drive circuit for this 100A module?
For a 100A module, the gate driver must be able to source and sink sufficient peak current to charge and discharge the IGBT's input capacitance quickly, minimizing switching losses. Key considerations include a low-inductance layout, a stable power supply for the driver IC, and potentially a negative gate voltage during the off-state to prevent parasitic turn-on.
How does the module's package type influence thermal design and mounting?
The module features a flat, isolated baseplate designed for direct mounting to a heatsink. Effective thermal management requires ensuring a flat mounting surface, using a quality thermal interface material (TIM) to minimize thermal resistance, and applying the correct mounting torque to guarantee optimal thermal contact between the module and the heatsink.
Design & Integration Support
While the 1MI100H-025 represents a mature technology, its fundamental role as a high-current switch remains relevant in specific engineering contexts. Its value lies in its simplicity and the direct control it offers designers. For projects involving custom power stages in low-voltage domains, or for ensuring the continued operation of valuable legacy equipment, this single IGBT module provides a proven, reliable solution. For a broader understanding of IGBT technology and its applications, resources from manufacturers like Infineon offer foundational knowledge.
