Content last revised on January 15, 2026
7MBR25SA120-55 Fuji Electric 1200V 25A IGBT PIM Module
The 7MBR25SA120-55, a cornerstone of the Fuji Electric S-series PIM (Power Integrated Module) family, represents a highly integrated solution for power conversion in industrial environments. By consolidating a three-phase input rectifier, a brake chopper, and a six-pack inverter stage into a single compact housing, this module addresses the critical demand for reduced system volume without compromising thermal robustness. As a professional distributor, we provide the technical data necessary for engineers to evaluate this module's fit within 1200V power architectures.
Highlights and Engineering Overview
This 1200V | 25A IGBT module is a high-performance integrated power stage designed to streamline the design of compact industrial motor drives and precision CNC machinery. Its 150°C maximum junction temperature allows for greater thermal headroom in high-density installations. Key benefits include a significant reduction in stray inductance due to the integrated layout and simplified assembly via the inclusion of a built-in NTC Thermistor. A common question among procurement teams is how integration affects long-term field reliability; the 7MBR25SA120-55 answers this through its Trenchstop technology, which ensures stable switching characteristics and real-time thermal monitoring to prevent catastrophic failures. For compact industrial inverters requiring integrated brake and converter stages, the 7MBR25SA120-55 is the standard-setting solution.
Key Parameter Overview
Decoding the Specs for Enhanced Thermal Reliability
The technical performance of the 7MBR25SA120-55 is defined by its ability to maintain low conduction losses while operating at high switching frequencies. The following table highlights the critical ratings derived from the official Fuji Electric technical documentation.
| Parameter Description | Symbol | Typical/Max Value | Engineering Significance |
|---|---|---|---|
| Collector-Emitter Voltage | Vces | 1200V | Suitable for 400V/480V AC line systems. |
| Collector Current (DC) | Ic | 25A | Continuous current handling at Tc=80°C. |
| Collector-Emitter Saturation Voltage | Vce(sat) | 2.10V | Minimizes heat dissipation during the "on" state. |
| Short Circuit Withstand Time | tsc | 10μs | Critical margin for protection circuit triggering. |
| Isolation Voltage | Viso | 2500V AC | Ensures safety compliance for industrial chassis. |
Understanding Vce(sat) is crucial for thermal management. You can think of it like the internal friction in a water pipe; the lower the value, the less energy is wasted as heat when the "current" flows through the module. This directly translates to smaller heatsink requirements and higher system efficiency.
Application Scenarios & Value
Achieving System-Level Benefits in High-Frequency Power Conversion
The 7MBR25SA120-55 is primarily utilized in Variable Frequency Drives (VFD) and Servo Drive systems where board space is at a premium. In a typical CNC spindle drive application, the module must handle rapid acceleration cycles that cause significant current surges. The 25A rating, combined with a robust RBSOA (Reverse Bias Safe Operating Area), ensures the module remains stable during inductive load switching.
In high-performance automation, the integration of the brake chopper is particularly valuable. It allows for controlled deceleration of high-inertia motors by dissipating regenerative energy through an external resistor, all managed within the same silicon footprint. For systems requiring even higher current handling within a similar topology, the related 7MBR50SB120 provides an upgraded 50A capacity. Engineers should also consult the engineers' guide to IGBT modules to better understand the nuances of PIM selection for 800V platforms or UPS systems.
Technical Deep Dive
The Architecture of Integrated Efficiency in PIM Design
The 7-pack configuration (inverter + brake) combined with the converter stage in the 7MBR25SA120-55 minimizes the distance between individual power components. This proximity is vital for reducing parasitic inductance, which is the primary cause of voltage overshoots during high-speed switching. Integrating these components is like moving all parts of a complex puzzle into a single pre-aligned frame—it eliminates the "electrical noise" generated by long external interconnects, resulting in a cleaner signal and reduced electromagnetic interference (EMI).
Furthermore, the NTC Thermistor is positioned directly on the ceramic substrate near the IGBT chips. This provides a far more accurate temperature reading than an external sensor mounted on the heatsink, allowing for precise Thermal Management. This level of integration is essential for modern Industrial HMI applications where power density must be maximized without sacrificing the 10-year service life expected in heavy machinery.
Application Vignette
Optimizing Reliability in Harsh Industrial Environments
Consider a Variable Frequency Drive installed in a textile factory where ambient temperatures are high and fine dust can accumulate on cooling fins, reducing airflow. In this scenario, the 7MBR25SA120-55’s integrated thermistor becomes a critical safety feature. As the heatsink efficiency degrades over time, the real-time feedback from the module allows the system controller to intelligently throttle the output frequency or current, protecting the IGBT Module from thermal runaway. This proactive protection is much more effective than simple over-current fuses, as it addresses the root cause of failure before the SCSOA (Short Circuit Safe Operating Area) limits are ever reached. This design philosophy is discussed in detail in our analysis of preventing overcurrent and overtemperature failures.
FAQ
How does the Vce(sat) of 2.10V impact my choice of cooling solution?
The 2.10V saturation voltage defines the conduction loss. A lower Vce(sat) allows for a more compact heatsink design, as less thermal energy needs to be evacuated from the junction to the ambient air for a given current load.
Is the built-in NTC thermistor sufficient for primary over-temperature protection?
Yes, because it is mounted on the same substrate as the IGBT die, it provides a much faster and more accurate thermal response than external sensors, enabling high-speed protection loops in the gate drive controller.
What are the benefits of the 7-pack integration compared to discrete IGBTs?
Integration significantly reduces parasitic inductance and simplifies PCB layout. This leads to lower voltage spikes (V=L*di/dt) during switching, which improves the lifespan of the insulation and reduces the need for large snubber circuits.
Can this module handle high-frequency switching above 15kHz?
While the 7MBR25SA120-55 is optimized for standard motor drive frequencies (2kHz to 15kHz), its low switching losses make it capable of higher frequencies, provided that the gate drive is properly tuned to manage the Miller effect and dV/dt limits.
Selecting the right power module requires a balance between electrical performance and thermal longevity. For technical teams seeking to integrate the 7MBR25SA120-55 into next-generation industrial drives, the focus should remain on optimized gate resistance and robust heatsink interfacing. As the industry moves toward higher power density, the reliability of integrated PIM solutions remains a strategic advantage for global manufacturing infrastructure.
