Eaton General-purpose encapsulated transformer S20N11S25CUSS4X - NEMA 4X enclosure

Copper windings deliver low impedance and superior thermal efficiency, reducing copper losses in continuous operation. This translates to cooler operation, longer transformer life, and lower energy waste—essential in high-current control circuits and high-demand automation cells. For engineers, the result is more stable voltage delivery to sensors and actuators, improving overall process reliability. Long-term, this supports reduced maintenance and fewer unscheduled downtime events. 60 Hz single-phase design aligns with standard North American power systems, simplifying installation and feeder planning. The configuration minimizes harmonics concerns in compact panels and reduces the need for complex phase balancing during commissioning. For procurement teams, this translates to faster rollout and lower project risk when upgrading legacy equipment. NEMA 4X enclosure with Grade 304 stainless steel offers robust corrosion resistance and indoor-outdoor suitability, supporting washdown environments and harsh industrial spaces. This protection lowers corrosion-related failures, extends service intervals, and reduces the total cost of ownership. In critical applications, the enclosure supports compliance with cleanliness and safety expectations in food, beverage, and water-treatment facilities. 25 kVA rating with 240/480 V primary and 120/240 V secondary provides flexible step-down for machine control circuits and auxiliary feeders, enabling centralized power conversion across multiple devices. The copper coil design ensures efficient voltage transformation with minimal losses, improving regulation at loaded conditions. This makes the unit well-suited for panel boards, machine tools, and packaging lines where stable voltage is essential. Compact footprint (14.06 in length, 28.24 in height, 22.42 in width) and a defined 128 A wiring connection facilitate panel layout and conduit routing. The internal copper windings, rugged EP design, and NEMA 4X enclosure simplify installation in new builds and revamps, while compatibility with standard mounting schemes accelerates retrofits. Warranty guidance under Eaton policy 25-000 offers one year from installation or 18 months from shipment, helping project planning and risk management.