Eaton S20N11S03CU General-Purpose Encapsulated Transformer - UL Listed
Part Number: S20N11S03CU
Quick Summary
Eaton general purpose encapsulated transformer delivers reliable single‑phase power isolation for control panels and industrial equipment. Many projects struggle with rugged outdoor conditions, limited space, and the need for consistent 3 kVA capacity under peak loads. Key certifications and ratings include UL Listed safety compliance and a rugged NEMA 3R enclosure designed for indoor-outdoor service, ensuring durable operation across environments. This transformer also supports a flexible primary range of 240/480 V and a secondary of 120/240 V, aligning with common panel and machine requirements. For engineers and procurement teams, the compact 176 frame and copper windings translate to easier installation, lower heat rise, and long-term cost efficiency in power management and distribution tasks.
Product Information
Extended Description
S20N11S03CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 176, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S03CU
UPC
786680032387
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
72 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
176
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
3 kVA
Weathershield
Indoor-Outdoor
Copper-windings EP-design delivers low resistance and high thermal efficiency, reducing energy losses while improving reliability under continuous duty. Feature → Business Impact → Application: Copper windings minimize I²R losses, extending transformer life and lowering operating temperatures in crowded control cabinets; use in automation panels and motor-start applications to sustain performance in demanding environments. The 3 kVA, 60 Hz, single‑phase rating ensures predictable performance for standard control circuits without oversized hardware, lowering capital cost and simplifying panel design for machine builders and OEMs. Feature → Business Impact → Application: 240/480 V primary to 120/240 V secondary support enables flexible sourcing and compatibility with existing power architectures, reducing wiring complexity and facilitating rapid deployment in plant retrofits. Feature → Business Impact → Application: NEMA 3R enclosure with indoor-outdoor suitability provides rugged, weather-resistant protection, enabling outdoor controls and remote equipment housings while meeting safety standards. Feature → Business Impact → Application: Compact 176 frame, 8 in depth, 14.25 in height, and 7.69 in width deliver a space-efficient footprint for crowded equipment racks and cabinet interiors, improving install times and reducing enclosure footprint costs. Feature → Business Impact → Application: UL Listed certification and a one-year to eighteen-month warranty offer risk mitigation for procurement and maintenance teams, supporting compliance programs and predictable total cost of ownership. Long-tail keywords such as “single-phase encapsulated transformer,” “3 kVA control panel transformer,” and “NEMA 3R weatherproof transformer” are integrated to aid discoverability. The design supports easy field wiring with a 3A wiring connection and copper windings for reliable fault isolation, addressing common objections about heat, size, and reliability while delivering proven performance for industrial power distribution.
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FAQs
The S20N11S03CU is designed for indoor-outdoor use with a rugged NEMA 3R enclosure and a compact 176 frame. Ensure mounting in a vibration-tolerant location, provide adequate clearance for cooling, and use the 3A wiring connection per the installation manual. The unit weighs 72 lb, so plan for secure mounting and proper lifting practices during panel integration.
This transformer provides 3 kVA at 60 Hz with a single phase. Primary voltages are 240 V and 480 V, while the secondary outputs are 120/240 V. Copper windings ensure low resistance, and the device supports a 115 °C temperature rise, making it suitable for controlled heat environments within industrial cabinets.
Yes. Its 3 kVA rating, copper windings, and 120/240 V secondary are well-matched to control panels and PLC power supplies. The NEMA 3R enclosure supports outdoor installations, while the compact footprint simplifies rack integration. Use in machine controls and automation equipment to ensure stable voltage feed and reduced noise in sensitive logic circuits.
The transformer carries UL Listed certification, indicating safety compliance for electrical components. Its NEMA 3R enclosure rating supports outdoor and indoor installations, providing rugged protection against environmental exposure. These certifications help meet regulatory requirements and simplify procurement for safety-conscious projects.
The device follows Eaton’s warranty policy, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides protection against manufacturing defects and overlaps with routine maintenance cycles. For ongoing reliability, Eaton’s documentation and the included datasheets aid in planning replacements or spares as part of a preventative maintenance program.