Eaton S20N11B15CU General-Purpose Transformer - UL Listed
Part Number: S20N11B15CU
Quick Summary
Eaton S20N11B15CU is a general-purpose encapsulated transformer engineered to power control panels from 240/480 V mains to 120/240 V secondary. For engineers facing space constraints, wiring complexity, and reliability targets, this unit streamlines installation while meeting stringent safety and performance expectations. Certified UL Listed and designed for indoor-outdoor service in a NEMA 3R enclosure, with copper windings and an 80 °C rise, it offers robust protection. This transformer supports efficient power distribution in industrial spaces and machine rooms, providing straightforward integration with control systems and the broader Eaton distribution ecosystem for minimized downtime and predictable lifecycle costs.
Product Information
Extended Description
S20N11B15CU Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 240 x 480v, taps: none, sv: 120/240v, 80°c, 15 kva, cu windings, frame: 182, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11B15CU
UPC
786685267265
Product Length/Depth
14.12 in
Product Height
23.31 in
Product Width
16.35 in
Product Weight
400 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
80 °C rise
Volt ampere rating
15 kVA
Weathershield
Indoor-Outdoor
Single-phase encapsulated transformer with a 15 kVA rating delivers safe, compact power conversion while maintaining insulation integrity in crowded panel enclosures. This configuration supports reliable distribution from 240/480 V mains to 120/240 V secondary, simplifying design and installation for control panels and machine feeders in manufacturing environments. Copper windings reduce resistive losses, improving efficiency and reducing heat buildup under load, while an 80 °C rise rating tolerates higher ambient temperatures common in industrial settings. The 182 frame and 400 lb weight provide practical handling options for site installation with standard lifting equipment, and 3A wiring simplifies panel connections to lower installation costs. The NEMA 3R indoor-outdoor enclosure ensures weather resistance, enabling versatile placement across production floors. UL Listed certification adds procurement confidence and aligns with strict electrical safety requirements, supporting compliance in regulated facilities. This unit is designed to integrate into Eaton’s broader power-management ecosystem for consistent maintenance and spare-part compatibility, reducing total cost of ownership over the equipment lifecycle.
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FAQs
When installing the S20N11B15CU, plan for a single-phase 15 kVA transformer with a 182 frame, copper windings, and a 400 lb weight. Utilize the NEMA 3R enclosure for indoor-outdoor service, ensure proper clearances for cooling, and verify wiring connections are set to 3A. Ensure source voltages are within the 240/480 V primary range and that the secondary supports 120/240 V loads with 60 Hz operation. Mounting should accommodate accessibility for maintenance and efficient heat dissipation.
Key specs include 15 kVA VA rating, 240/480 V primary, 120/240 V secondary, 60 Hz, copper windings, and an 80 °C rise. These values indicate compatibility with typical industrial control circuits, efficient energy transfer under load, and robust temperature tolerance for continuous operation. The encapsulated design minimizes electrical noise and provides reliable isolation between primary and secondary circuits, improving system stability in automation panels.
Yes, the S20N11B15CU is designed for indoor-outdoor use with a NEMA 3R enclosure, providing protection against weather and corrosion in mixed environments. For outdoor installations, ensure proper mounting height and ventilation, and consider environmental factors such as humidity and transient voltages. UL Listed certification confirms safety compliance for typical regulatory environments, simplifying procurement for regulated facilities.
Key verifications include UL Listed certification, confirming safety and tested performance. Confirm enclosure suitability (NEMA 3R for indoor-outdoor service) and ensure compatibility with your regional electrical standards. While the data lists UL compliance, verify any regional CE or IP expectations in your facility’s jurisdiction to ensure full regulatory alignment and ease of acceptance in global projects.
Plan for routine inspections of copper windings and enclosure integrity, particularly in environments with dust or moisture exposure. Rely on the 15 kVA, 60 Hz rating for predictable load performance and monitor the 80 °C rise under peak loading to avoid overheating. The provided one-year warranty (from installation) or 18 months from shipment supports early lifecycle risk management, and compatibility with Eaton’s accessory ecosystem helps minimize spare-part inventories and maintenance downtime.