Eaton S20N11E15A Transformer - UL Listed NEMA 3R
Part Number: S20N11E15A
Quick Summary
Eaton S20N11E15A transformer provides reliable power isolation for control panels and industrial distribution. Engineers often wrestle with space constraints, exposure to the elements, and complex wiring in modern facilities. UL Listed safety certification, NEMA 3R enclosure protection, and 60 Hz single‑phase operation ensure compliance and durable performance. For facilities seeking reliability and efficiency, this transformer integrates with Eaton's power-management ecosystem and reduces total cost of ownership. The aluminum-winding, encapsulated design supports compact footprint and straightforward installation in mixed environments. With a 15 kVA rating and a 115 °C rise rating, it handles short-term load spikes without overheating. This combination delivers predictable voltage levels, fewer wiring errors, and faster commissioning for engineers.
Product Information
Extended Description
S20N11E15A Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 180, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 15 KVA, indoor-outdoor, 90A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11E15A
UPC
786680104701
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
215 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 A
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
180
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
90A
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
15 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated transformer with an EP design and aluminum windings. Business impact: The encapsulation protects windings from moisture and dust, extending service life while reducing maintenance. Application: Ideal for control panels and distribution feeders in indoor-outdoor environments. Feature: Voltage flexibility and power rating align with common industrial loads. Business impact: Primary 240/480 V and secondary 120/240 V at 60 Hz and 15 kVA reduce the number of required devices and spare parts. Application: Suitable for facilities migrating between voltages or consolidating transformers in line-start or machine-control applications. Feature: Thermal resilience (115 °C rise) and aluminum windings. Business impact: Minimizes copper heating, supports stable output under peak loads, and reduces derating. Application: Critical for short surges on packaging lines or conveyors. Feature: Easy wiring with a single 90 A connection and no taps; compact footprint. Business impact: Simplifies termination, reduces installation time, lowers risk of mis-wiring. Application: Control cabinet retrofits and new machine builds. Feature: Indoor-outdoor, NEMA 3R enclosure and electrostatic shielding. Business impact: Enhances EMI/EMC performance and weather resistance, enabling year-round operation with low maintenance. Application: Outdoor gantries, motor drives, and remote panels in factory yards. Feature: Documentation and safety certifications; compatibility with Eaton ecosystem. Business impact: Facilitates procurement, regulatory readiness, and streamlined commissioning. Application: Projects requiring fast qualification, standardized footprints, and reliable service across facilities.
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FAQs
The S20N11E15A requires a modest footprint with clearances for service access. It measures 10.52 in long, 13.38 in wide, and 19 in high, and weighs about 215 lb. It uses a single 90 A wiring connection with no external taps. The NEMA 3R enclosure supports indoor or outdoor mounting, simplifying site integration and wiring terminations.
Key specifications include 60 Hz, single-phase operation with 240/480 V primary and 120/240 V secondary, rated at 15 kVA. The unit uses aluminum windings and has an 115 °C rise. It is UL Listed, with a 90 A maximum wiring connection, and a 15 kVA capacity suitable for general-purpose loads.
Yes. This transformer is designed as a general-purpose encapsulated unit with indoor-outdoor capability and a compact form factor, making it well suited for control panels, machine feeders, and distribution blocks. The NEMA 3R enclosure protects against moisture and dust, while the single‑phase 60 Hz configuration simplifies integration with common automation equipment.
It carries UL Listed certification, indicating safety compliance for electrical devices. The enclosure is rated NEMA 3R, suitable for indoor and outdoor installations. Together these certifications support regulatory adherence, facilitate procurement with qualified suppliers, and simplify passing commissioning tests in industrial facilities and utility-adjacent sites for example, utilities, manufacturing, and distribution centers.
Maintenance is minimal due to the encapsulated design and durable aluminum windings; routine inspections and connection checks suffice. The 15 kVA rating and robust enclosure reduce downtime risks, improving uptime and workflow efficiency. Over time, lower maintenance costs and predictable performance contribute to a favorable return on investment and longer asset life.