Eaton S18N11S05CU General-Purpose Transformer - UL Listed
Part Number: S18N11S05CU
Quick Summary
The Eaton S18N11S05CU is a general-purpose encapsulated transformer designed for indoor or outdoor power distribution in industrial facilities and control panels. It helps operations avoid recurring maintenance by providing a rugged, sealed solution that resists moisture and corrosion. With a NEMA 3R enclosure and copper windings, the unit is built for reliable performance in demanding environments. UL Listed certification reinforces safety compliance while its 208/416 V primary and 120/240 V secondary ratings align with common plant voltages. This transformer delivers efficiency and installation simplicity, supporting streamlined procurement and reduced stock variety for power management and distribution needs.
Product Information
Extended Description
S18N11S05CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 177, 60 Hz, single-phase, 208 V, 416 V, 120/240 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 3O
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S18N11S05CU
UPC
786685223438
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
119 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
177
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
3O
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
208 V, 416 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S18N11S05CU
Selling Policy 25-000 - Distribution and Control Products and Services
Copper windings and encapsulated EP design deliver high reliability with reduced leakage paths, improving uptime and lowering maintenance costs for critical loads in automation panels. The result is smoother startup sequences and predictable voltage delivery to controls and instrumentation, especially in harsh plant environments where vibration and dust challenge less robust devices. The NEMA 3R enclosure supports indoor-outdoor placement, enabling rapid deployment without additional weatherproofing and saving space in compact switchgear rooms. With 60 Hz, single-phase operation and primary voltages of 208 V or 416 V to secondary 120/240 V, this transformer simplifies panel design and reduces the need for multiple SKUs across distribution racks and control cabinets. The 5 kVA rating matches typical automation and control loads, delivering efficiency gains and cost-per-watt reductions over legacy solutions. The unit’s weight (119 lb) and dimensions (approx. 9.89 in x 10.38 in x 16 in) inform mounting and clearance planning, while the 115 °C rise rating supports continuous operation under moderate overload conditions. UL Listed certification and the indoor-outdoor Weathershield provide regulatory confidence and risk mitigation, aligning procurement with safety standards and warranty commitments (one year from install or 18 months from shipment).
Get a Quick Quote for a Eaton S18N11S05CU
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton S18N11S05CU?
Enquire Now
FAQs
Plan for a 9.89 inch depth, 10.38 inch width, and 16 inch height footprint with an approximate 119 lb weight. The unit is a rugged, encapsulated transformer designed for 60 Hz single-phase operation and 208/416 V input to 120/240 V output. Ensure adequate clearance for cooling, allow for service access, and provide proper mounting to support vibration and load stability in industrial environments.
The transformer provides a 208 V or 416 V primary and a 120/240 V secondary, operating at 60 Hz in a single-phase configuration. With a 5 kVA rating, it suits control circuits, sensor networks, and automation panels, reducing the need for multiple step-down transformers and facilitating simplified power distribution across standard industrial voltages.
Yes. The S18N11S05CU features a NEMA 3R enclosure and Weathershield design for indoor-outdoor use, enabling reliable operation in varied climates. UL Listed certification further confirms safety compliance, making it appropriate for outdoor panels, equipment rooms adjacent to production lines, and other exposed installations where weather resistance and protection from dust are required.
This transformer is UL Listed, ensuring compliance with electrical safety standards. It carries Eaton’s warranty policy, offering one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This warranty supports maintenance planning and total cost of ownership in long-term automation and distribution projects.
Encapsulated copper-wound designs minimize oil leakage and improve thermal management, delivering higher reliability and lower maintenance needs in harsh industrial settings. The 115 °C rise rating supports continuous operation under typical overload conditions, while NEMA 3R and indoor-outdoor compatibility reduce the risk of weather-related failures and simplify installation in control rooms and outdoor enclosures.