The Fuji 6MBI50UA-120 is a 6-Pack IGBT module integrating six insulated gate bipolar transistors in a full three-phase bridge configuration, rated for 50A continuous collector current and 1200V collector-emitter voltage. Built on Fuji Electric's proven UA-series platform, this module delivers reliable switching performance in demanding industrial environments. Its compact, integrated design reduces system wiring complexity and supports high-frequency PWM operation, making it a preferred choice for engineers designing or maintaining variable frequency drives, servo amplifiers, and industrial inverter systems where consistent gate-drive behavior and thermal performance are critical.

The 6MBI50UA-120 sees widespread deployment in three-phase AC motor drive systems, uninterruptible power supplies (UPS), elevator drive controllers, CNC machine tool spindle drives, and industrial HVAC inverters. Its 1200V blocking voltage provides the necessary headroom for 480V AC line-connected applications, while the 50A current rating suits mid-range motor drive designs in the 10–30kW output range. Replacement demand remains high in field service and MRO environments where aging drive platforms rely on this module and factory-new supply is no longer readily available through standard distribution channels.

Quick Reference: 6MBI50UA-120

Key Features of the 6MBI50UA-120:

• 6-Pack full three-phase bridge configuration — six IGBTs in a single module for simplified inverter stage design and reduced component count
• 1200V VCES rating providing sufficient voltage margin for 480V/600V AC bus applications with standard derating practice
• 50A IC continuous rating supporting mid-range industrial drive outputs across a broad operating temperature range
• Integrated freewheeling diodes on each IGBT switch for flyback current clamping without external diode arrays
• Low VCE(sat) characteristics consistent with Fuji UA-series IGBT technology, reducing conduction losses in high-duty-cycle PWM applications
• Industry-standard module footprint enabling direct drop-in replacement in existing drive platforms without mechanical modification

The 6MBI50UA-120 was discontinued by Fuji Electric, and current factory lead times for new production runs exceed 99 weeks — effectively making spot stock the only practical source for maintenance and repair. Engineers managing aging drive fleets or procurement teams supporting long-term service contracts cannot rely on the standard supply chain for this component. Securing inventory now is critical to avoiding unplanned downtime. ATI Accurate Technology maintains stock of hard-to-find and obsolete IGBT modules specifically to support these scenarios, with verified new OEM parts ready for immediate shipment.

ATI Accurate Technology is headquartered in Palmetto, Florida and specializes in power semiconductors including IGBTs, thyristors, diodes, and rectifier modules — with deep inventory in obsolete and long-lead-time parts. Orders placed before 5PM EST ship same day. Contact our team for volume pricing, cross-reference support, or application questions: call 239-734-7566 or email sales@igbts.us. Visit igbts.us to check live availability.