Eaton S20L11S37CU Encapsulated Transformer - UL Listed
Part Number: S20L11S37CU
Quick Summary
Eaton S20L11S37CU general purpose encapsulated transformer powers control panels and industrial equipment. It addresses voltage fluctuations and harsh environments by delivering rugged NEMA 3R protection and dependable 60 Hz operation. UL Listed safety certification ensures compliance for industrial installations, with copper windings and epoxy encapsulation contributing to long service life. This model offers flexible voltage configurations and easy installation into panel boards, delivering reliable power conversion for manufacturing lines and automation racks. Designed for indoor-outdoor use and compatibility with Eaton's EP line, it provides efficient, maintenance-friendly power distribution for modern automation systems.
Product Information
Extended Description
S20L11S37CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 300A, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 2 at -5% FCBN X 4 at -2.5% FCBN, 115 °C rise, 37.5 KVA, indoor-outdoor, 248A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11S37CU
UPC
786680015953
Product Length/Depth
14.06 in
Product Height
28.24 in
Product Width
22.42 in
Product Weight
867 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
300A
Tap size
2 at -5% FCBN x 4 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
248A
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
37.5 kVA
Weathershield
Indoor-Outdoor
Feature: Copper-wound, encapsulated design. Business impact: delivers robust thermal performance and high reliability under demanding temperatures. Application: ideal for control panels and outdoor installations in manufacturing facilities. Feature: 37.5 kVA rating with 240/480 V primary and 120/240 V secondary. Business impact: enables mixed-voltage loads from a single unit, reducing inventory and wiring complexity. Application: serves manufacturing lines, distribution panels, and automation racks. Feature: NEMA 3R enclosure with indoor-outdoor weathershield. Business impact: protects windings from moisture, dust, and wind-driven rain, extending service life and reducing maintenance. Application: outdoor substations and exposed installations in variable environments. Feature: 60 Hz, single-phase operation. Business impact: aligns with common North American power systems, simplifying integration and start-up. Application: general-purpose transformer replacements in legacy equipment and new controls. Feature: Tap size of 2 at -5% FCBN × 4 at -2.5% FCBN. Business impact: supports fine voltage regulation to stabilize secondary voltages under load swings. Application: critical controls and PLC power supplies where voltage precision matters. Feature: Heavy-duty frame and wiring configuration (300A frame, 248A wiring connection) with copper coil and 867 lb weight. Business impact: robust current handling and durability, though installation requires lifting gear and clear space. Application: installation in panel boards and equipment rooms with high current requirements. Feature: UL Listed certification. Business impact: provides safety assurance and regulatory compliance for industrial facilities. Application: installation in regulated environments and during safety audits. Feature: Warranty and service support. Business impact: reduces risk with one-year from installation or eighteen months from shipment, aiding maintenance budgeting. Application: procurement planning for long-term reliability in automation projects.
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FAQs
This transformer features a rugged NEMA 3R enclosure designed for indoor-outdoor use. Plan for proper mounting space, secure lifting equipment due to its 867 lb weight, and ensure adequate clearance for heat dissipation and service access. Connect the 240/480 V primary and 120/240 V secondary per OEM diagrams, and follow electrical codes for panel boards and distribution equipment.
Key specs include 37.5 kVA rated power, 60 Hz frequency, single-phase operation, primary voltages of 240 V or 480 V, and secondary voltages of 120/240 V. This configuration supports flexible loading in automation and control applications, while copper windings enhance efficiency and thermal performance under continuous operation.
Yes. The S20L11S37CU employs an EP encapsulated copper-wound design with a NEMA 3R enclosure, and is specified for indoor-outdoor use with weather resistance. It is well-suited for outdoor panels, manufacturing yards, and exposed control cabinets where protection from moisture, dust, and temperature variation is critical.
The product is UL Listed, providing recognized safety certification for industrial installations. This certification, along with the NEMA 3R enclosure, supports regulatory compliance for electrical equipment in harsh environments and during safety audits. Always confirm site-specific certifications required for your project and local regulations.
The transformer carries a warranty per Eaton policy: one year from installation or eighteen months from shipment, whichever comes first. For maintenance planning, rely on the copper windings and robust encapsulation to minimize routine servicing. Regular inspection of connections and enclosure integrity is recommended to sustain reliability in demanding facilities.