The Fuji ETN81-055 is a 550V-rated power semiconductor module built to Fuji Electric's industrial-grade standards for reliability and thermal performance. Designed for integration into high-power switching and rectification circuits, this module delivers consistent electrical characteristics essential for controlled power conversion environments. Its robust construction and verified voltage blocking capability make it a dependable choice for engineers specifying components in variable frequency drives, industrial inverters, and other demanding power electronics platforms where component-level integrity is non-negotiable.

The ETN81-055 sees broad deployment across industrial sectors including metal processing, oil and gas, marine propulsion, crane and hoist systems, and large-scale HVAC infrastructure. It is commonly specified in legacy drive platforms and OEM equipment where Fuji module pinouts and electrical parameters must be maintained for drop-in replacement. Facilities running continuous operations—where unplanned downtime carries significant cost—rely on in-stock sourcing partners rather than waiting on extended factory lead times to restore equipment to service quickly.

Quick Reference: ETN81-055

Key Features of the ETN81-055:

• 550V blocking voltage rating suitable for medium-voltage industrial power conversion circuits
• Fuji Electric OEM construction ensuring consistent junction characteristics and gate drive compatibility with original designs
• Optimized thermal resistance profile supporting efficient heat dissipation in properly mounted heatsink assemblies
• Compact module form factor enabling direct replacement in existing drive and inverter chassis without mechanical modification
• Low on-state losses contributing to overall system efficiency in continuous duty switching applications
• Screened and tested to OEM specifications, providing traceability and confidence for critical maintenance and repair applications

At 99 weeks of factory lead time, sourcing the ETN81-055 through standard distribution channels is not a viable option for most maintenance and repair scenarios. Facilities managing aging Fuji-based drive platforms or OEM equipment with obsolete or long-lead power modules cannot afford to wait nearly two years for new production. Procurement professionals increasingly rely on specialized stocking distributors who maintain ready inventory of these components. Having the right part on the shelf—properly stored, verified new OEM, and shippable the same day—is the only practical solution for keeping critical industrial assets online.

ATI Accurate Technology is a power semiconductor specialist based in Palmetto, Florida, stocking hard-to-find, long-lead-time, and obsolete IGBTs, thyristors, diodes, and rectifier modules including the Fuji ETN81-055. Orders received before 5PM EST ship same day. Volume pricing is available for MRO stockrooms and procurement teams managing multiple units. Contact our team directly at 239-734-7566 or sales@igbts.us to confirm availability and receive a quote.