The Fuji Electric 7MBR100U4B120B-01 is a 1200V, 100A IGBT power module from the U4B-series platform, engineered for demanding high-frequency switching applications where thermal performance and switching losses are critical design parameters. Built on Fuji's advanced IGBT chip technology, this module integrates a complete inverter bridge configuration with fast-recovery freewheeling diodes, offering a well-matched, thermally optimized solution for systems requiring reliable gate drive response and low on-state voltage drop across a wide operating temperature range.

This module is widely deployed in industrial variable-frequency drives (VFDs), servo amplifiers, regenerative AC/DC converters, uninterruptible power supplies (UPS), welding inverters, and induction heating equipment. Its 1200V blocking voltage and 100A continuous current rating make it a preferred choice for three-phase motor control in heavy industrial environments including pumping stations, HVAC systems, crane drives, and precision CNC machinery where consistent power conversion efficiency and long mean-time-between-failure (MTBF) are non-negotiable requirements.

Quick Reference: 7MBR100U4B120B-01

Key Features of the 7MBR100U4B120B-01:

• 1200V collector-emitter breakdown voltage (VCES) with 100A continuous collector current rating for robust power handling in industrial-class inverters
• Integrated fast-recovery freewheeling diodes co-packaged and thermally matched to IGBT chips, reducing external component count and improving switching transitions
• Low saturation voltage (VCE(sat)) characteristic minimizes conduction losses and reduces heatsink thermal requirements under continuous load
• Optimized for switching frequencies up to 20kHz, supporting high-resolution PWM control in servo and spindle drive applications
• Isolated baseplate construction provides high dielectric withstand voltage between power terminals and mounting surface, simplifying heatsink grounding design
• U4B-series platform offers pin and footprint compatibility within the Fuji U-series family, facilitating drop-in replacement evaluation in existing drive designs

The 7MBR100U4B120B-01 has been discontinued by Fuji Electric, with any new production carrying a 99-week factory lead time — effectively making open-market stock the only practical sourcing path for repair depots, OEM service departments, and procurement teams supporting fielded equipment. Waiting on factory allocation is rarely viable when a drive is down and production is halted. Obsolescence in this voltage and current class is common across legacy industrial platforms, and locating verified new OEM stock quickly is the difference between hours and months of downtime.

ATI Accurate Technology, based in Palmetto, FL, stocks hard-to-find and obsolete IGBT modules including the 7MBR100U4B120B-01 and ships same-day on orders placed before 5PM EST. We support maintenance engineers and procurement professionals with competitive pricing, volume discounts, and responsive technical service. Contact our team directly at 239-734-7566 or sales@igbts.us to confirm availability, request a quote, or discuss multi-unit pricing for stocking orders.