Eaton S20N11S15CU General-Purpose Transformer - UL Listed
Part Number: S20N11S15CU
Quick Summary
Eaton S20N11S15CU is a general-purpose encapsulated transformer designed for reliable power conversion in industrial control panels and distribution networks. Engineers often grapple with moisture, space constraints, and downtime when deploying transformers in harsh environments. This model carries UL Listed certification and a rugged NEMA 3R enclosure, supporting indoor-outdoor service and long service life. With copper windings, a 15 kVA rating, and a 60 Hz, single-phase design, it delivers efficient, code-compliant isolation for 120/240 V secondary from 240/480 V primary, making it a dependable choice for mixed-voltages in automation and power distribution applications.
Product Information
Extended Description
S20N11S15CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 182, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 15 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S15CU
UPC
786680032424
Product Length/Depth
14.12 in
Product Height
18.06 in
Product Width
16.35 in
Product Weight
421 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
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
15 kVA
Weathershield
Indoor-Outdoor
Copper coil construction provides low resistance and improved thermal performance, translating to higher efficiency and reduced heat generation in continuous operation. The encapsulated EP design protects windings from moisture and dust, lowering maintenance needs and extending service life in demanding environments. A 15 kVA rating supports moderate power loads typical of control panels and small sub-distribution networks, while the 60 Hz, single-phase configuration aligns with common North American supply, simplifying integration and reducing customization costs. The NEMA 3R enclosure enhances outdoor and semi-indoor viability, enabling installation in outdoor switchyards or damp plant zones without enclosure rain ingress concerns. Primary voltage options of 240 V and 480 V with a 120/240 V secondary offer flexible voltage conversion for control circuits and auxiliary equipment. The 182 frame, 14.12 in length, 16.35 in width, and 18.06 in height provide a predictable footprint for panel builders and retrofit projects. A straightforward 3A wiring connection supports quick, reliable terminations, while the copper winding and encapsulation design help minimize maintenance intervals and maximize uptime. The unit ships with standard warranties and UL Listed certification to ease procurement, compliance checks, and service planning. This transformer is compatible with indoor-outdoor configurations and integrates well with Eaton and third-party protection devices for coordinated overcurrent and isolation protection in automated systems.
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FAQs
Plan for a stable mounting surface to support the 421 lb weight, allocate space for the 14.12 in x 16.35 in footprint, and ensure ventilation. Use the NEMA 3R enclosure for outdoor or damp locations. Wiring should conform to the 3A connection, with proper strain relief and secure terminations to maintain reliability in dynamic environments.
The transformer operates at 60 Hz, with a primary voltage of 240 V or 480 V and a secondary voltage of 120/240 V. It is designed for single-phase service and supports common industrial distributions, enabling straightforward connection to control circuitry and auxiliary equipment.
Yes. The unit features a rugged NEMA 3R enclosure and indoor-outdoor weather capability, allowing installation in outdoor switchyards, loading docks, or damp factory floors. The encapsulated copper-wind design helps resist moisture ingress, supporting long-term reliability in exposed environments.
Warranty terms follow Eaton Selling Policy 25-000: one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This provides a solid baseline for planning preventive maintenance and budgeting for potential replacements or refurbishments in larger automation projects.
Copper windings reduce resistive losses and improve heat dissipation, contributing to higher efficiency and lower operating costs. Encapsulation protects windings from moisture and dust, reducing maintenance cycles and unexpected downtime. For projects with outdoor exposure or continuous duty, these design choices translate into longer service life and lower total cost of ownership.