Eaton S20K11S05CU Transformer - UL Listed
Part Number: S20K11S05CU
Quick Summary
Eaton S20K11S05CU transformer provides reliable 5 kVA power conversion for control panels and industrial equipment. The design addresses challenges like voltage variance and harsh installation conditions by delivering stable output in compact form. Key standards and coverage include UL Listed certification and a NEMA 3R enclosure for indoor-outdoor use, supporting rugged reliability in demanding environments. This solution pairs robust electrical performance with practical installation advantages, enabling easier integration into existing distributions and reducing total cost of ownership for industrial facilities.
Product Information
Extended Description
S20K11S05CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at -10% FCBN X 2 at -5% FCBN, 115 °C rise, 5 KVA, indoor-outdoor, 9A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20K11S05CU
UPC
786680032974
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
121 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
1 at -10% FCBN x 2 at -5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
9A
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
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S20K11S05CU
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: Copper-wound coils in a general-purpose encapsulated transformer deliver low resistance and high efficiency, reducing copper losses and improving overall system efficiency in motor control and automation panels. Application: control rooms, outdoor substations, and machine bays where efficiency and reliability matter. Feature → Business Impact → Application: EP design and encapsulation protect windings from contaminants and moisture, lowering maintenance needs and extending service life in damp or dusty environments. Application: outdoor enclosures and rugged industrial plants. Feature → Business Impact → Application: NEMA 3R enclosure and 60 Hz single-phase operation support consistent voltage delivery to 120/240 V secondary circuits from 240/480 V sources, improving downstream equipment performance in PLCs and drives. Application: automated manufacturing lines and packaging systems. Feature → Business Impact → Application: 5 kVA VA rating with 9 A wiring connectivity ensures straightforward integration with common control panels, reducing panel size and simplifying installation. Application: machine tenders, conveyors, and process equipment. Feature → Business Impact → Application: Voltage tap settings of 1 at -10% FCBN and 2 at -5% FCBN provide voltage regulation to absorb supply variations, minimizing nuisance trips and component wear. Application: critical sensing circuits and motor starters. Feature → Business Impact → Application: Indoor-outdoor Weathershield and copper coil construction improve reliability in harsh environments, supporting long service intervals and predictable maintenance windows. Application: outdoor control panels and process automation sites. Feature → Business Impact → Application: UL Listed certification confirms compliance and quality control, helping procurement meet regulatory and supplier requirements. Application: audited commissioning and supplier qualification.
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FAQs
What mounting, clearances, and enclosure choices are recommended for installing the S20K11S05CU in outdoor or damp environments? Ensure a compliant NEMA 3R enclosure, provide adequate ventilation, and observe clearance for service access and cooling. The unit's encapsulated copper windings support reliable performance in variable ambient conditions.
The S20K11S05CU delivers 5 kVA with 60 Hz frequency in a single-phase configuration. Primary voltages are 240 V or 480 V, while the secondary provides 120/240 V. Temperature rise is rated at 115 °C, and the unit uses copper windings within a NEMA 3R enclosure for indoor-outdoor use.
Yes. With a NEMA 3R enclosure and indoor-outdoor rating, copper-wound windings, and an encapsulated design, the S20K11S05CU is well-suited for outdoor control cabinets, dusty or damp facilities, and demanding manufacturing environments where reliability and longevity matter.
The product is UL Listed, signaling adherence to recognized safety standards. This certification supports regulatory compliance for electrical distribution in many industries and simplifies supplier qualification and warranty planning for the purchasing organization.
Warranty follows Eaton's policy (one year from installation or eighteen months from shipment, whichever occurs first). Routine inspections should focus on enclosure integrity, winding insulation condition, and connection torque at taps to prevent performance degradation over time.