Eaton S20N11S25N General-Purpose Transformer - UL Listed
Part Number: S20N11S25N
Quick Summary
General purpose encapsulated transformer is designed to reliably convert 240/480 V mains to 120/240 V control voltages for industrial systems. Operators face challenges with weather exposure, space constraints, and mismatched voltages in retrofits. UL Listed certification ensures safety compliance, and a rugged NEMA 3R enclosure supports reliable indoor-outdoor operation. This model also integrates well with standard panel layouts and 25 kVA capacity, delivering consistent power for machine controls, lighting, and distribution boards. For engineers and procurement teams, the combination of compact footprint, robust construction, and end-to-end Eaton support translates into lower installation risk and predictable lifecycle costs. The product aligns with modern power-management expectations while fitting existing automation architectures.
Product Information
Extended Description
S20N11S25N Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 240 x 480v, taps: none, sv: 120/240v, 115°c, 25 kva, al windings, frame: 182, indoor-outdoor-
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S25N
UPC
786680108839
Product Length/Depth
20 in
Product Height
20.2 in
Product Width
25 in
Product Weight
385 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
Catalog Notes
Model N
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
182
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
3A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
25 kVA
Weathershield
Indoor-Outdoor
Single-phase 25 kVA transformer with aluminum windings and an EP encapsulated design delivers robust reliability and simplified maintenance, reducing unplanned downtime in critical lines. This configuration supports consistent voltage conversion from 240/480 V to 120/240 V, enabling common control circuits without extra transformers. The rugged NEMA 3R enclosure provides indoor-outdoor protection, lowering enclosure costs and enabling outdoor installations near equipment. Frame 182 and a compact footprint help fit the unit into tight panel spaces, while the 385 lb weight offers solid mechanical stability during mounting. A 60 Hz, 25 kVA transformer with no taps (3A wiring) minimizes field-adjustment steps and speeds up installation. UL Listed certification further enhances safety compliance and supplier support for industrial automation projects. These features collectively reduce total installed cost and improve lifecycle performance for distribution panels and control systems.
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FAQs
For panel integration, plan for single-phase 60 Hz operation with 240/480 V primary and 120/240 V secondary. The transformer is rated at 25 kVA and uses a 182 frame, with dimensions roughly 20 in long by 25 in wide by 20.2 in high. It weighs 385 lb and employs a 3A winding connection, with no taps. Ensure adequate mounting clearance, ventilation, and compatible enclosure provisions to achieve indoor-outdoor suitability. Verify UL Listed status during assembly and maintain appropriate wiring practices to support reliable performance in automation panels.
Key specifications include a 25 kVA rating, 60 Hz frequency, single-phase design, primary voltages of 240 V and 480 V, and secondary voltages of 120/240 V. Winding material is aluminum, with a 115°C temperature rise. There are no taps (taps: none) and a 3A wiring connection. The enclosure is suitable for indoor-outdoor use (NEMA 3R), and the unit is UL Listed for safety compliance.
Yes. The transformer is designed for indoor-outdoor use with an NEMA 3R enclosure specification and Weathershield capability noted as indoor-outdoor. UL Listed certification further supports safe operation in varied environments. This makes it a solid choice for outdoor electrical rooms or exposed panel locations where weather resistance and rugged construction are required.
The 25 kVA rating provides ample headroom for startup surges and peak loads common in automation panels, reducing voltage drop risk and improving reliability. Aluminum windings help balance performance with cost, contributing to efficient operation. Fewer transformers may be required in multi-load scenarios, potentially lowering total installed cost (TIC) and simplifying spare-part inventories for better ROI in manufacturing environments.
Warranty follows Eaton policy: one year from installation or eighteen months from shipment, whichever occurs first. Certifications include UL Listed for safety compliance, and the product features a NEMA 3R enclosure suitable for indoor-outdoor use. Model notes indicate catalog details (Model N) and standard Eaton support, helping ensure ongoing reliability and serviceability in industrial applications.