Table of Contents

Fujitsu 2MBI100U4A-120-50 IGBT Module – 1200V / 100A Overview, Specs, and Uses

Q: What thermal resistance values are specified?

R th(j-c) is 0.05 °C/W for the IGBT and 0.23 °C/W for the diode.

September 21, 2025

2MBI100U4A-120-50 Overview

2MBI100U4A-120-50 is a Fuji Electric IGBT power module rated at 1200 V / 100 A. Designed with advanced IGBT and freewheeling diode technology, the 2MBI100U4A-120-50 is built for reliable switching performance in medium- to high-power industrial applications. This IGBT module is widely used in motor drives, UPS systems, power converters, and renewable energy inverters.

With its compact package and strong thermal management characteristics, the 2MBI100U4A-120-50 provides engineers with a dependable solution that balances efficiency, switching speed, and ruggedness. Its isolation voltage of 2500 VAC for 1 minute, low thermal resistance, and proven reliability test results make the 2MBI100U4A-120-50 a trusted choice for system designers.

2MBI100U4A-120-50 Key Features

Collector-Emitter Voltage (VCES): 1200 V
Continuous Collector Current (IC): 100 A at TC = 25 °C
Pulsed Collector Current (ICP): up to 200 A at TC = 80 °C
Gate-Emitter Voltage (VGES): ±20 V
Collector Power Dissipation (PC): 540 W at Tj = 125 °C
Isolation Voltage: 2500 VAC for 1 minute between terminals and base
Operating Junction Temperature Range: –40 °C to +150 °C
Storage Temperature Range: –40 °C to +125 °C
Screw Mounting Torque: 2.5–3.5 N·m (M5 bolts)
Low Thermal Resistance: Rth(j-c) of 0.05 °C/W (IGBT), 0.23 °C/W (diode)

Applications of 2MBI100U4A-120-50

The 2MBI100U4A-120-50 is designed for demanding industrial and energy applications:

Industrial Motor Drives: Reliable motor control for medium- and high-voltage systems.
Uninterruptible Power Supplies (UPS): Ensures efficient power switching and backup reliability.
Inverters for Renewable Energy: Widely used in solar and wind energy conversion systems.
Power Converters: For general industrial power conditioning and conversion.
Welding Equipment: Delivers robust current handling for heavy-duty welding systems.
Traction and Transport Systems: Suitable for railway drives and electric transportation.

Technical Specifications of 2MBI100U4A-120-50

Equivalent circuit diagram of 2MBI100U4A-120-50 IGBT module with dual IGBTs and freewheeling diodes.

Parameter	Value
Collector-Emitter Voltage (V<sub>CES</sub>)	1200 V
Continuous Collector Current (I<sub>C</sub>)	100 A (T<sub>C</sub> = 25 °C)
Pulsed Collector Current (I<sub>CP</sub>)	200 A (T<sub>C</sub> = 80 °C, 1 ms)
Collector Power Dissipation (P<sub>C</sub>)	540 W (T<sub>j</sub> = 125 °C)
Junction Temperature Range	–40 °C to +150 °C
Storage Temperature Range	–40 °C to +125 °C
Gate-Emitter Voltage (V<sub>GES</sub>)	±20 V
Saturation Voltage (V<sub>CE(sat)</sub>)	1.90 – 2.20 V (at I<sub>C</sub> = 100 A, V<sub>GE</sub> = 15 V, T<sub>j</sub> = 25 °C)
Forward Voltage Drop (diode)	1.65 – 1.95 V (I<sub>F</sub> = 100 A, T<sub>j</sub> = 25 °C)
Input Capacitance (C<sub>ies</sub>)	6.5 – 8.5 nF
Turn-on Delay (t<sub>on</sub>)	0.32 – 1.20 µs
Turn-off Time (t<sub>off</sub>)	0.41 – 1.00 µs
Isolation Voltage (V<sub>iso</sub>)	2500 VAC for 1 min
Thermal Resistance R<sub>th(j-c)</sub>	0.05 °C/W (IGBT)
Thermal Resistance R<sub>th(j-c)</sub>	0.23 °C/W (diode)

Package and Dimensions of 2MBI100U4A-120-50

Outline drawing of Fuji Electric 2MBI100U4A-120-50 IGBT module showing package dimensions in millimeters.

2MBI100U4A-120-50 is provided in a robust industrial-grade module package. The outline drawing shows standard module dimensions with a solid copper base for heat dissipation. The module is designed for screw mounting with M5 bolts, requiring a torque of 2.5–3.5 N·m. Thermal compound is recommended between the module base and heatsink to ensure reliable thermal conductivity.

Advantages and Disadvantages of 2MBI100U4A-120-50

Advantages:

High voltage rating (1200 V) suitable for industrial power systems.
High current capacity (100 A continuous, 200 A pulsed).
Low thermal resistance for effective heat dissipation.
Proven reliability through mechanical, environmental, and endurance tests.
Compact package with standardized mounting.

Disadvantages / Considerations:

Requires careful thermal management with heatsinks and compounds.
Saturation voltage around 2.0 V introduces conduction losses at high current.
Limited to ±20 V gate drive; exceeding may cause device damage.
Operation outside the RBSOA (Reverse Bias Safe Operating Area) can lead to device failure.

Common Issues and Solutions for 2MBI100U4A-120-50

Switching time and loss characteristics of 2MBI100U4A-120-50 IGBT module under different collector currents and gate resistances

Heat buildup during continuous operation: Use proper heatsinks and apply thermal compound evenly.
Gate drive misconfiguration: Ensure –VGE of –15 V is maintained to avoid erroneous turn-on.
High dv/dt leading to false turn-on: Adjust gate resistance (RG) and drive conditions.
Overvoltage avalanche risk: Always operate below the rated VCES of 1200 V.
Mechanical stress on terminals: Avoid deformation of power and control leads during mounting.

Equivalent Models of 2MBI100U4A-120-50

According to the datasheet, no direct equivalents are specified for the 2MBI100U4A-120-50. However, Fuji Electric offers other IGBT modules in the 2MBI series with different current ratings (e.g., 2MBI75U4A-120, 2MBI150U4A-120). For replacements, engineers must carefully compare voltage, current, thermal resistance, and switching characteristics before substitution.

2MBI100U4A-120-50 Datasheet

2MBI100U4A-120-50 Datasheet Download

Conclusion

The 2MBI100U4A-120-50 is a robust 1200 V / 100 A Fuji Electric IGBT module suitable for industrial automation, renewable energy inverters, UPS systems, and motor drives. Its excellent thermal performance, strong isolation, and reliability make it a preferred choice for engineers. While equivalents are not explicitly listed, the broader Fuji 2MBI family provides related options. For long-term use, proper heatsink mounting and adherence to maximum ratings are critical to ensuring reliable operation.

FAQs

+ What is the rated voltage and current of the 2MBI100U4A-120-50?

It is rated at 1200 V collector-emitter voltage and 100 A continuous collector current at T_C = 25 °C.

+ What is the isolation voltage of the 2MBI100U4A-120-50?

The module provides 2500 VAC isolation between terminals and base for 1 minute.

+ How should the 2MBI100U4A-120-50 be mounted?

Using M5 screws with 2.5–3.5 N·m torque and thermal compound for optimal heatsink connection.

+ What thermal resistance values are specified?

R_th(j-c) is 0.05 °C/W for the IGBT and 0.23 °C/W for the diode.

+ Are there equivalent models to the 2MBI100U4A-120-50?

No direct equivalents are listed; however, other Fuji Electric 2MBI series modules (e.g., 2MBI75U4A-120) may be considered with careful specification checks.