Eaton S20L11S25CU Encapsulated Transformer - UL Listed
Part Number: S20L11S25CU
Quick Summary
The Eaton S20L11S25CU encapsulated transformer delivers reliable power conversion for indoor and outdoor electrical distribution. Facilities face voltage fluctuations and space constraints; this unit mitigates both with a rugged EP design and precise taps that suit variable loads. It carries CSA Certified and UL Listed approvals, with a NEMA 3R enclosure that supports dependable outdoor-indoor operation. At a 25 kVA rating and copper windings, this transformer efficiently serves 60 Hz single-phase applications while reducing energy waste. Its compact footprint and Eaton engineering simplify panel design, procurement, and ongoing maintenance for industrial environments.
Product Information
Extended Description
S20L11S25CU Eaton: Eaton General-Purpose Encapsulated Transformer, EP, Single-phase, PV: 240 x 480V, Taps: 2 at-5% FCBN x 4 at -2.5% FCBN, SV: 120/240V, 115°C, 25 kVA, Copper windings, Frame: 182, 23A, Indoor-Outdoor, 60 Hz, NEMA 3R
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11S25CU
UPC
786680104077
Product Length/Depth
14.12 in
Product Height
23.31 in
Product Width
16.35 in
Product Weight
380 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
CSA Certified UL Listed
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
182
Tap size
2 at -5% FCBN x 4 at -2.5% FCBN
Type
General-purpose encapsulated transformer
Wiring connection
23A
Frequency rating
60 Hz
Kva Rating
25 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
25 kVA
Weathershield
Indoor-Outdoor
Feature: 25 kVA single-phase transformer with 240/480 V primary and 120/240 V secondary. Business impact: Handles mid-range distribution needs with efficient voltage transfer, supporting reliable equipment operation and reduced downtime. Application: Suitable for control panels and feeder banks in manufacturing facilities seeking compact, scalable power isolation. The 60 Hz rating ensures compatibility with common industrial mains and equipment. Feature: Copper windings. Business impact: Improves thermal performance and efficiency, reducing copper loss and operating temperatures. Application: Ideal for high-demand loads in motors, drives, and controls where stability matters. Feature: Tap settings 2 at -5% FCBN and 4 at -2.5% FCBN. Business impact: Enables precise voltage regulation to counter supply variance and line drop, lowering equipment wear and nuisance tripping. Application: Critical for sensitive instrumentation and control logic boards. Feature: NEMA 3R enclosure, Indoor-Outdoor. Business impact: Increases installation flexibility and safety, reducing the need for additional enclosures and weatherproofing. Application: Outdoor-rated installations in warehouses, service entrances, and substations. Feature: 115 °C rise and 380 lb weight in a 14.12 x 16.35 x 23.31 in footprint. Business impact: Robust thermal margin and space-conscious design that fits standard plant layouts without compromising performance. Application: Retrofit projects and new builds where space optimization matters. Feature: Certifications and warranty. Business impact: CSA Certified and UL Listed compliance support audits and procurement confidence; one-year warranty from installation or 18 months from shipment reduces TCO. Application: Long-term asset management and supplier reliability for industrial buyers.
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FAQs
The S20L11S25CU is rated for indoor-outdoor use with a NEMA 3R enclosure, making it suitable for sheltered outdoor locations and controlled indoor spaces. When planning installation, ensure adequate ventilation, access for maintenance, and clearance around the 182 frame size. Account for the 380 lb weight and secure mounting to minimize vibration and noise in production environments. The unit’s dimensions fit standard electrical rooms and service enclosures, simplifying integration with existing power distribution schemes.
The transformer provides two taps at -5% FCBN and four taps at -2.5% FCBN, enabling precise voltage compensation as line voltage drifts occur. This helps maintain downstream equipment within tolerance, reducing nuisance tripping in sensitive controls and motors. During peak loads, selecting the appropriate tap minimizes voltage drop, improving performance and extending equipment life without the need for additional regulators.
Yes. The S20L11S25CU is designed for 60 Hz single-phase service with a 25 kVA rating and primary voltages of 240 V and 480 V, paired with a 120/240 V secondary. It is well suited for industrial power distribution, control panels, and equipment rooms that require stable isolation and balanced voltage delivery for diverse loads.
This transformer carries CSA Certified and UL Listed certifications, confirming regulatory compliance for safety and performance. Its NEMA 3R enclosure is specified for indoor-outdoor installations, providing splash and weather resistance while protecting windings and terminals. These features help meet industry and regional electrical codes, supporting audit-ready documentation and supplier reliability.
ROI is driven by improved uptime, reduced voltage-related faults, and lower maintenance costs from a durable encapsulated design. The 25 kVA rating matches common mid-size loads, tap-adjustment capability minimizes wasted energy, and CSA UL certification streamlines procurement and compliance. Over time, these factors translate to lower total cost of ownership and faster project payback in facilities with fluctuating mains and demanding loads.