7MBR50VB120-50 Fuji Electric 1200V 50A 7-in-1 IGBT Module

Content last revised on January 4, 2026

7MBR50VB120-50: Fuji Electric 1200V, 50A V-Series 7-in-1 PIM IGBT Module

The Fuji Electric 7MBR50VB120-50 is a highly integrated Power Integrated Module (PIM) delivering a complete inverter, converter, and brake solution specifically for low-to-mid power motor drives. This module features a **1200V** collector-emitter voltage, a **50A** continuous collector current, and a 7-in-1 topology. Its primary engineering benefits include a significantly simplified system design and enhanced thermal management capabilities. This module directly addresses the challenge of creating compact Variable Frequency Drives (VFDs) by integrating seven power stages into a single package, reducing PCB footprint and assembly complexity. For space-constrained servo drives and general-purpose inverters, this module's high level of integration and thermal efficiency present a compelling design choice.

Application Scenarios & Value

System-Level Benefits in Compact Motion Control Systems

The 7MBR50VB120-50 is engineered to streamline the design of low-power AC and DC servo drive amplifiers, general-purpose inverters, and Uninterruptible Power Supplies (UPS). Its core value lies in its 7-in-1 PIM configuration, which integrates a three-phase converter bridge, a three-phase inverter, and a brake chopper into one compact module. Consider the design of a motion control system for automated machinery where cabinet space is at a premium. The challenge is to implement a full power conversion and motor control circuit without occupying excessive volume. The 7MBR50VB120-50 directly solves this by consolidating multiple discrete power stages into a single component, reducing the required PCB area and simplifying the overall assembly process. Furthermore, the integrated brake circuit is critical for servo applications requiring rapid deceleration, as it safely dissipates regenerative energy from the motor, ensuring precise control and system stability. For systems requiring higher current handling, the related 7MBR75VB120-50 offers a 75A rating within the same functional family.

Key Parameter Overview

Decoding the Electrical Characteristics for Efficient Drive Design

The performance of the 7MBR50VB120-50 is defined by its electrical and thermal characteristics, which are optimized for efficiency and reliability in demanding industrial environments. Understanding these parameters is key to leveraging the module's full potential.

Download the 7MBR50VB120-50 datasheet for detailed specifications and performance curves.

Technical Deep Dive

A Closer Look at the V-Series IGBT and Integrated Topology

The 7MBR50VB120-50 leverages Fuji Electric's V-Series IGBT technology, which is instrumental in achieving its low power loss characteristics. The core of this technology is a refined trench gate and field-stop structure that minimizes the collector-emitter saturation voltage (VCE(sat)). Think of VCE(sat) as the 'friction' inside the switch when it's on. The low typical VCE(sat) of 2.20V at its rated current means less energy is wasted as heat during operation. This is analogous to a well-lubricated bearing that runs cooler and more efficiently than a rusty one, directly contributing to higher overall system efficiency and reducing the demands on the cooling system.

The strategic value of the 7-in-1 integration extends beyond just saving space. Consolidating the power stages into a single, thermally optimized package simplifies thermal management. Instead of managing the heat from multiple disparate components, engineers can focus on cooling a single module. This integration can be compared to a modern System-on-Chip (SoC) in computing, where the CPU, GPU, and memory controllers are placed on a single die. This approach not only reduces physical size but also minimizes parasitic inductance and improves electrical performance compared to a solution built from discrete components. For more details on IGBT technologies, see this guide from Fuji Electric.

Frequently Asked Questions

What is the primary advantage of the 7-in-1 configuration in the 7MBR50VB120-50?
The main advantage is system simplification. It combines the input rectifier, output inverter, and brake chopper into a single component, which reduces the physical footprint, lowers assembly costs, and simplifies the overall power stage design for motor control applications.

How does the integrated NTC thermistor improve the reliability of a motor drive?
The built-in NTC thermistor provides real-time temperature feedback from the module's substrate. This allows the drive's control system to implement precise over-temperature protection, preventing thermal runaway and enhancing the long-term reliability and safety of the entire system.

The datasheet specifies a VCE(sat) of 2.20V (Typ). How does this translate to real-world performance benefits?
A lower VCE(sat) directly reduces conduction power loss (P = VCE(sat) * IC). This results in higher operational efficiency, less waste heat generation, and allows for a smaller, more cost-effective heatsink, contributing to a more compact and energy-efficient final product.

Is the integrated brake chopper in this module sufficient for high-inertia loads?
The integrated brake chopper is rated for the module's power class and is suitable for many servo and inverter applications with moderate regenerative energy. For systems with very high-inertia loads or frequent, aggressive braking cycles, an external braking resistor and potentially a higher-power external brake unit may be necessary. The datasheet provides specific ratings for the brake circuit to facilitate this analysis.

This integrated approach is fundamental to developing the next generation of compact, efficient, and reliable industrial automation systems. By combining multiple functions into a single, performance-optimized package, modules like the 7MBR50VB120-50 enable engineers to meet the increasing demands for power density and efficiency in modern robotic servo drives and other advanced control systems.