Eaton S20N11S05CU General-Purpose Transformer - UL Listed
Part Number: S20N11S05CU
Quick Summary
Eaton general purpose encapsulated transformer is designed to power control panels and industrial equipment with reliable, compact single‑phase power conversion. You often face downtime and wiring complexity in rugged environments, and a robust, enclosure-ready transformer can slash maintenance cycles while improving reliability. UL Listed safety certification and a NEMA 3R enclosure provide protection for indoor-outdoor deployment, aligning with rigorous electrical codes. With copper windings and a 5 kVA rating, this unit delivers consistent performance for servo drives, controls, and auxiliary power needs, while supporting efficient installation and serviceability across varied industrial settings.
Product Information
Extended Description
S20N11S05CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S05CU
UPC
786680032394
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
135 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
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
5 kVA
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: Copper coil windings deliver low resistance and high thermal efficiency, reducing heat buildup and extending transformer life in continuous operation. This translates to improved uptime for critical automation equipment and a measurable reduction in cooling requirements in control rooms and switchgear. Application: General purpose encapsulated transformers in machine control panels and industrial enclosures. Feature → Business Impact → Application: 60 Hz single-phase design matches standard North American power systems, enabling straightforward integration with existing facility power distribution and minimizing conversion losses. Application: OEM machines, packaging lines, and HVAC controls. Feature → Business Impact → Application: Primary voltage options of 240 V and 480 V with secondary 120/240 V provide versatile scaling for control circuits and field devices, reducing inventory complexity and enabling a single part to serve multiple panels. Application: Panel boards and distribution centers. Feature → Business Impact → Application: 5 kVA rating supports typical control circuits, lighting, and small motors with a reliable margin, lowering the risk of voltage drop and improving performance in automation loops. Application: Robotic cells, conveyors, and processing lines. Feature → Business Impact → Application: NEMA 3R enclosure and indoor-outdoor compatibility simplify installation in damp or semi-exposed environments, reducing site prep and enclosure requirements. Application: Outdoor-rated control housings and rugged factory floors. Feature → Business Impact → Application: UL Listed certification provides safety assurance and streamlined compliance documentation, helping with audits and code adherence. Application: Systems integrators and maintenance teams seeking proven reliability. This combination of copper windings, encapsulated design, and robust enclosure translates to lower life-cycle costs, fewer field failures, and clearer maintenance planning for heavy industrial environments.
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FAQs
This transformer is designed for indoor-outdoor use with a NEMA 3R enclosure, supporting rugged environments. Ensure mounting provides adequate clearance for cooling, verify alignment with 60 Hz single-phase systems, and route 3A wiring per the catalog guidance. Use the 240/480 V primary and 120/240 V secondary configuration to minimize local step-down wiring complexity and to simplify panel wiring diagrams.
The unit is a 5 kVA, single-phase transformer operating at 60 Hz. Primary voltages are 240 V and 480 V, with secondary outputs of 120/240 V. These specs enable straightforward integration into standard North American control panels and distribution systems without the need for additional voltage conversion or complex wiring schemes.
Yes, the S20N11S05CU is designed for indoor-outdoor use and features a NEMA 3R enclosure. This rating provides protection against rain, wind-driven dust, and other environmental factors, making it suitable for outdoor control cabinets, equipment rooms, and exposed facility installations.
Key documents include the Eaton specification sheet for S20N11S05CU and the Commercial Distribution Transformers catalog/table. These PDFs provide detailed electrical characteristics, mounting guidelines, wiring diagrams, and compliance notes to support engineering reviews and field approvals.
The product follows Eaton’s warranty policy, offering a one-year warranty from installation or an 18-month window from shipment, whichever comes first. Support includes access to Eaton technical resources, installation guidance, and replacement part recommendations to minimize downtime and sustain system performance.