Content last revised on November 20, 2025
6MBP50RS120 IGBT Module: A Technical Review for 1200V/50A Power Systems
Engineering Overview & Core Specifications
An Integrated Inverter Solution for Industrial Drives
This Fuji Electric module delivers a complete 1200V/50A six-pack inverter stage, optimized for thermal stability and streamlined integration in industrial power systems. With key specifications of 1200V | 50A | 6-Pack Configuration, it offers two primary engineering benefits: simplified thermal monitoring via an integrated NTC thermistor and a compact, all-in-one design that reduces assembly complexity. This module provides a robust and field-proven foundation for three-phase motor control, particularly in Variable Frequency Drive (VFD) applications. For mid-power AC motor control designs up to 22kW demanding a balance of performance and integration, the 6MBP50RS120 offers a proven solution.
Key Parameter Overview
Data-Driven Insights for System Design
The technical specifications of the 6MBP50RS120 are foundational for accurate system modeling, thermal management, and performance prediction. The parameters below are grouped by function to facilitate component evaluation for power electronic designs.
Table 1: Key Electrical & Thermal Characteristics
| Absolute Maximum Ratings (Tc = 25°C) | |
|---|---|
| Collector-Emitter Voltage (Vces) | 1200V |
| Gate-Emitter Voltage (Vges) | ±20V |
| Continuous Collector Current (Ic) | 50A (Tc = 80°C) |
| 1ms Collector Current Pulse (Icp) | 100A |
| Max Power Dissipation (Pc) | 280W |
| Operating Junction Temperature (Tj) | +150°C |
| Inverter Part Electrical Characteristics (Tj = 25°C) | |
| Collector-Emitter Saturation Voltage (Vce(sat)) | 2.7V (max) at Ic = 50A |
| Gate-Emitter Threshold Voltage (Vge(th)) | 5.0V to 8.0V |
| Input Capacitance (Cies) | 4.0nF (typ) |
| Turn-on Switching Time (ton) | 600ns (typ) |
| Turn-off Switching Time (toff) | 550ns (typ) |
| Thermal and NTC Characteristics | |
| Thermal Resistance, Junction to Case (Rth(j-c)) - IGBT | 0.45°C/W (max) |
| Thermal Resistance, Junction to Case (Rth(j-c)) - FWD | 0.78°C/W (max) |
| NTC Resistance (R25) | 5kΩ ±3% |
Application Scenarios & Value
Enhancing Reliability in AC Motor Control and Power Converters
The 6MBP50RS120 is engineered primarily for three-phase power conversion applications, where its integrated nature provides significant system-level advantages. Its "best fit" is in applications like Variable Frequency Drive (VFD) systems, small to medium-sized servo drives, and general-purpose inverters.
A high-fidelity engineering challenge illustrates its value: designing a motor drive for a material handling conveyor system that experiences frequent start-stop cycles and variable loads. This unpredictable duty cycle creates thermal stress. The 6MBP50RS120's integrated NTC thermistor provides a direct and accurate measurement of the module's internal temperature. This data allows the VFD's microcontroller to implement intelligent thermal protection, adjusting the switching frequency or limiting motor current to prevent overheating. This proactive thermal management is crucial for avoiding unscheduled downtime and extending the service life of the entire drive system. For applications requiring higher current handling capacity, the related 6MBP75RS120 provides a 75A rating within a similar package.
Frequently Asked Questions (FAQ)
What is the significance of the integrated NTC thermistor in the 6MBP50RS120?
The integrated NTC thermistor provides a direct, real-time temperature feedback loop from the module's baseplate. This allows the system controller to precisely monitor thermal conditions, enabling over-temperature protection and dynamic performance adjustments. This feature is critical for enhancing system reliability and preventing catastrophic failures due to thermal runaway.
How does the 1200V Vces rating of the 6MBP50RS120 relate to its typical application in AC motor drives?
A 1200V rating provides the necessary voltage margin for reliable operation on 380V to 480V three-phase AC mains. During switching, voltage overshoots caused by stray inductance can occur. The 1200V breakdown voltage ensures the device operates well within its Safe Operating Area (SOA), providing robustness against line voltage fluctuations and transient spikes common in industrial environments.
Application Vignette
Design Considerations for Compact, High-Reliability Servo Drives
Consider the challenge of designing a compact servo drive for a multi-axis CNC milling machine. Key requirements are high power density to minimize cabinet space, and exceptional reliability to ensure continuous, precision machining operations. The 6MBP50RS120 module directly addresses these needs.
By integrating a full three-phase inverter (six IGBTs and six freewheeling diodes) into a single standard package, this Power Integrated Module (PIM) dramatically reduces the required PCB footprint compared to using twelve separate discrete components. This simplification not only saves space but also minimizes parasitic inductance between switches, leading to cleaner switching waveforms and reduced electromagnetic interference (EMI). The Collector-Emitter Saturation Voltage (Vce(sat)) of 2.7V at its nominal current dictates the module's conduction losses. This parameter is like the "friction" of the switch; a lower value translates directly to less heat generated and higher overall efficiency for the servo drive. This efficiency is critical in densely packed enclosures where thermal dissipation is limited.
For technical evaluation or to discuss integrating the 6MBP50RS120 into your power system design, please refer to the official manufacturer's datasheet for comprehensive performance data. Our team can assist with sourcing inquiries for your project bill of materials.
