The Fuji 6MBI450U-170 is a 6-Pack IGBT module integrating six insulated gate bipolar transistors in a three-phase bridge configuration, rated for 450A continuous collector current and 1700V collector-emitter voltage. Built to Fuji Electric's U-Series design standards, this module delivers low saturation voltage, fast switching characteristics, and integrated freewheeling diodes — making it a robust solution for high-power, high-efficiency power conversion in demanding industrial environments. Its compact footprint and optimized thermal interface make it a direct-fit replacement in systems originally designed around this platform.

The 6MBI450U-170 is well suited for medium-voltage industrial AC motor drives, regenerative inverters, and servo drive systems operating at the 690V AC bus level. It sees widespread deployment in steel mill auxiliary drives, paper machine sections, mining conveyors, large HVAC variable frequency drives, and wind turbine converter stacks. Traction applications and UPS systems with high fault-current demands also rely on this module's 1700V blocking capability and 450A current handling to maintain reliable operation under variable load and switching frequency conditions.

Quick Reference: 6MBI450U-170

Key Features of the 6MBI450U-170:

• 1700V collector-emitter breakdown voltage with 450A rated collector current for high-power three-phase bridge topologies
• 6-Pack configuration integrates upper and lower switch pairs for all three phases, reducing bus bar complexity and stray inductance
• Low V_CE(sat) characteristic minimizes conduction losses across the full load range, improving system efficiency
• Integrated inverse parallel freewheeling diodes optimized for hard-switching and soft-switching PWM drive applications
• Isolated baseplate construction rated for high-voltage isolation, compatible with standard Fuji U-Series heatsink and thermal interface designs
• Gate drive compatible with standard 15V/-8V bipolar gate drive circuits used across industrial drive platforms

The 6MBI450U-170 has been discontinued by Fuji Electric, with new factory production currently carrying a 99-week lead time — well beyond the tolerance of most repair cycles or unplanned equipment downtime scenarios. For OEMs managing legacy product lines and MRO teams supporting installed equipment, locating verified new stock through a specialized distributor is the only practical path to a fast resolution. Attempting to substitute alternative 1700V 6-Pack modules without confirmed pin and parameter compatibility carries significant application risk and should be approached with caution.

ATI Accurate Technology, based in Palmetto, Florida, stocks the 6MBI450U-170 and ships same-day on orders placed before 5PM EST. ATI specializes in obsolete, long-lead-time, and hard-to-find power semiconductors including IGBTs, thyristors, diodes, and rectifier modules. Volume pricing is available for MRO stockers and OEM purchasing teams. Contact ATI at 239-734-7566 or sales@igbts.us to confirm availability and request a quote.