Fuji 7MBR50UA120 IGBT Module

Fuji Electric 7MBR50UA120 IGBT Module | The Compact Powerhouse for Integrated Motor Drives

The **Fuji Electric 7MBR50UA120** is a highly integrated Power Integrated Module (PIM) designed for engineers seeking to optimize performance and reduce complexity in low-to-medium power applications. This 1200V, 50A module combines a three-phase converter, a three-phase inverter, and a dynamic brake chopper into a single, compact U-Series package. It's an ideal solution for small AC drives, servo controllers, and uninterruptible power supplies (UPS), where space, assembly cost, and system reliability are paramount.

Technical Deep Dive: The Engineering Edge of the 7MBR50UA120

The true value of the **7MBR50UA120** lies in its sophisticated design, which directly addresses common engineering challenges. Two key features stand out:

• All-in-One CIB Integration: By integrating the Converter, Inverter, and Brake (CIB) circuits, this module significantly reduces the bill of materials (BOM) and required PCB real estate. This architecture minimizes parasitic inductance between components, which is a common source of voltage overshoot and EMI noise in discrete designs. The result is a cleaner, more reliable power stage that simplifies EMC filtering and accelerates your design-to-market timeline.
• Low Conduction Loss Technology: The module utilizes Fuji's advanced trench-gate field-stop IGBT technology. This results in an impressively low collector-emitter saturation voltage (Vce(sat)). For the end-user, this translates directly into reduced conduction losses and less heat generation. This efficiency gain allows for smaller heatsinks, higher power density, and lower operational energy costs over the system's lifetime.

Application Scenarios Where the 7MBR50UA120 Excels

This module isn't just a component; it's a problem-solver for specific industrial applications.

• Compact AC Motor Drives: In applications like conveyor belts, pumps, and fans, space is often at a premium. The integrated nature of the **7MBR50UA120** allows for incredibly compact inverter designs. The built-in brake chopper efficiently handles regenerative energy during deceleration, providing superior motor control without needing a separate, bulky braking unit.
• Precision Servo Control Systems: The clean switching characteristics and low thermal drift of this module enable precise and repeatable current control. This is critical for robotics, CNC machines, and automated assembly lines where positioning accuracy is non-negotiable.
• Uninterruptible Power Supply (UPS): Efficiency is key in UPS systems to maximize battery runtime. The low Vce(sat) of this IGBT module minimizes power loss during conversion, extending the availability of backup power. Its proven reliability ensures the UPS is ready when needed most.
• Welding Equipment: The module's robust thermal performance and ability to handle pulsed power loads make it a dependable choice for the power conversion stage in modern inverter-based welding equipment.

Key Technical Parameters Overview

For detailed specifications, please refer to the 7MBR50UA120 Datasheet.

Selection Guidance: PIM vs. Discrete Solutions

Engineers often weigh the benefits of an integrated PIM like the **7MBR50UA120** against a design using discrete IGBTs and diodes. While a discrete approach offers granular component selection, the PIM provides overwhelming advantages in:

• Assembly & Manufacturing: A single module drastically reduces pick-and-place and soldering steps, lowering manufacturing costs and improving throughput.
• Reliability & Thermal Management: With all power semiconductors on a single isolated substrate, thermal management is simplified and more effective. The pre-tested, integrated design eliminates many potential failure points present in complex discrete layouts.
• Performance: Reduced internal wiring and optimized layout within the module lead to lower stray inductance and superior switching performance compared to what is typically achievable on a standard PCB.

For applications under 7.5 kW requiring braking functionality, the 7MBR50UA120 often presents the most cost-effective and reliable path. To explore other power levels or package types, you can explore more IGBT Modules on our website.

Frequently Asked Questions

• What is the primary advantage of the integrated brake chopper?

  The brake chopper provides a built-in circuit to dissipate regenerative energy from a decelerating motor. This prevents DC bus overvoltage faults and allows for controlled, rapid stopping, eliminating the need for an external braking resistor controller and simplifying the overall system design.

• Is this module suitable for high-frequency switching (e.g., > 15 kHz)?

  The 7MBR50UA120 is optimized for low-to-medium switching frequencies, typically in the 2-15 kHz range, which is common for motor drives and UPS. While it can operate at higher frequencies, switching losses will increase, potentially requiring more aggressive thermal management. For higher frequency needs, a different IGBT series might be more suitable.

If you're designing a system that demands reliability, efficiency, and a compact footprint, the Fuji Electric 7MBR50UA120 is an exceptional choice. Contact Us for a Quote to discuss your project's specific requirements with our technical specialists.