Fuji Electric 1MBI400N-120 | Robust 1200V NPT IGBT for High-Power Conversion
Product Highlights: Built for Uncompromising Reliability
The Fuji Electric 1MBI400N-120 is an industry-proven 1200V, 400A single IGBT module engineered for high-stress power conversion applications. Where other components might falter, this module excels by prioritizing ruggedness and a wide Safe Operating Area (SOA) over chasing the lowest possible switching losses. It represents a strategic choice for engineers developing systems where long-term reliability and resilience to harsh operating conditions are non-negotiable design criteria.
- High Current Capability: A substantial 400A rating provides ample headroom for demanding industrial motor drives, welders, and high-power DC-DC converters.
- Robust NPT Technology: Utilizes Non-Punch Through (NPT) silicon, known for its superior short-circuit withstand capabilities and excellent thermal stability.
- Design Flexibility: The single-switch (1-in-1) configuration offers maximum freedom for designers to implement custom topologies, from simple chopper circuits to complex, multi-level inverters.
- Positive VCE(sat) Temperature Coefficient: This intrinsic characteristic simplifies the process of paralleling modules for ultra-high current applications, ensuring stable current sharing without thermal runaway.
Key Performance Parameters
The following specifications underscore the 1MBI400N-120's suitability for high-power industrial systems. For a comprehensive overview, you can download the complete datasheet here.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (VCES) | 1200V |
| Continuous Collector Current (IC) @ TC=80°C | 400A |
| Collector-Emitter Saturation Voltage (VCE(sat)) typ. @ IC=400A | 2.2V |
| Short Circuit Withstand Time (tsc) | 10µs |
| Total Power Dissipation (PC) | 2080W |
| Thermal Resistance (Rth(j-c)) | 0.06 K/W |
Application Scenarios & Engineering Value
The Fuji Electric 1MBI400N-120 is not just a component; it's a solution to specific engineering challenges in heavy industrial environments.
- Welding Power Supplies: In arc welding, the power stage is subjected to frequent short circuits and extreme load variations. The robust SOA (Safe Operating Area) and 10µs short-circuit rating of the 1MBI400N-120 provide the resilience needed to survive these events, ensuring long operational life.
- High-Frequency Induction Heating: These systems require components capable of handling high continuous currents in resonant circuits. The 400A rating and excellent thermal performance of this module allow for efficient power delivery to the workpiece, making it ideal for the core of a powerful induction heating inverter.
- High-Power DC Choppers & SMPS: The single-switch topology is perfectly suited for step-up (boost) or step-down (buck) converters in applications like battery chargers, DC motor drives, and renewable energy systems. Its simplicity minimizes stray inductance and simplifies gate drive layout.
A Deeper Look: The Advantage of NPT Technology
While modern Trench Field-Stop (TFS) IGBTs offer lower conduction losses, the NPT technology in the Fuji Electric 1MBI400N-120 provides distinct advantages in certain applications. NPT IGBTs feature a more uniform silicon structure, which contributes to a wider, more forgiving Reverse Bias Safe Operating Area (RBSOA). This means the device is more tolerant of overvoltage conditions during turn-off, a common occurrence in circuits with high stray inductance. For engineers designing systems that must operate reliably under unpredictable load conditions, this inherent toughness is a critical design advantage that can simplify or even eliminate the need for complex snubber circuits.
Strategic Advantage: The Workhorse for Mission-Critical Systems
In an industry focused on continuous innovation, the 1MBI400N-120 stands as a testament to the value of proven, mature technology. For new designs in ultra-high efficiency consumer goods, newer generation modules may be suitable. However, for industrial machinery, large-scale power supplies, and infrastructure projects where capital investment is high and downtime is unacceptable, this module offers a de-risked, cost-effective, and field-proven solution. Choosing the IGBT modules is about selecting a component whose reliability has been demonstrated over millions of operating hours in the field. For expert guidance on selecting the right power module for your specific application, contact our technical team for a detailed consultation.
