Eaton S20N11S03XSS General-Purpose Encapsulated Transformer - UL Listed
Part Number: S20N11S03XSS
Quick Summary
The Eaton S20N11S03XSS is a general-purpose encapsulated transformer that steps 240/480 V to 120/240 V for control panels. Engineers need reliable, weather-ready power conversion that minimizes install time and wiring complexity in harsh environments. UL Listed, NEMA 3R enclosure, and Grade 304 stainless options support safe operation across indoor-outdoor settings. This model's 3 kVA rating and aluminum windings deliver efficient, durable power for control panels.
Product Information
Extended Description
S20N11S03XSS Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 240 x 480v, taps: none, sv: 120/240v, 115°c, 3 kva, al windings, frame: 177, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S03XSS
UPC
786680094101
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
113 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
Catalog Notes
50/60 Hz, Grade 304 stainless steel enclosure
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
177
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
3A
Frequency rating
50-60 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
Feature: 3 kVA single-phase transformer with dual primary voltages (240 V and 480 V) and a 120/240 V secondary. Business Impact: Versatile installation across multiple panel designs and equipment with a single, common part. Application: Ideal for machine controls and compact control panels in mixed-voltage environments. Paragraph 2: Feature: EP encapsulated construction with aluminum windings. Business Impact: Improved thermal performance, reduced insulation leakage, and higher reliability in continuous-duty applications. Application: High-heat or humid environments where long life and stable operation matter. Paragraph 3: Feature: NEMA 3R indoor-outdoor enclosure and optional Grade 304 stainless steel enclosure. Business Impact: Proven protection against moisture, dust, and corrosion, lowering maintenance cycles. Application: Outdoor substations, washdown areas, and corrosive environments. Paragraph 4: Feature: Compact frame 177 with a footprint of 9.89 in × 10.38 in × 16 in and weight 113 lb. Business Impact: Easy mounting in standard electrical cabinets and streamlined installation. Application: Retrofit projects and new builds aiming for space efficiency. Paragraph 5: Feature: UL Listed with 50–60 Hz operation and a 115 °C temperature rise; 3-year warranty terms. Business Impact: Regulatory compliance assurance, predictable maintenance planning, and confidence in long-term performance. Application: Industrial facilities requiring compliant, durable power conversion solutions.
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FAQs
Compatibility is straightforward for standard 3A wiring and common panel mounts. The transformer features a 177 frame, NEMA 3R enclosure options, and a 9.89" x 10.38" x 16" footprint, enabling easy mounting in most cabinet openings. Verify clearance for heat dissipation and ensure primary voltage selection matches your supply (240 or 480 V) before installation.
Key specs include a 3 kVA rating, single-phase design, primary voltages of 240 V or 480 V, and secondary 120/240 V. It operates at 50–60 Hz and features aluminum windings with a 115 °C rise. The enclosure is suitable for indoor-outdoor service, and the unit weighs 113 lb with a robust 177-frame footprint.
Yes, the NEMA 3R enclosure supports indoor-outdoor operation and protects internal components from moisture and dust. For enhanced corrosion resistance in washdown or chemical environments, a Grade 304 stainless steel enclosure option is available. UL Listing further confirms compliance with industry safety standards for outdoor installations worldwide.
The S20N11S03XSS carries Eaton's warranty policy of one year from installation or eighteen months from shipment, whichever occurs first. It is UL Listed, and catalog notes specify a 50/60 Hz rating with a corrosion-resistant Grade 304 stainless steel option. These assurances support regulatory compliance and long-term reliability in diverse facilities.
With a 3 kVA rating and rugged aluminum windings, the transformer delivers reliable power and long service life, reducing unplanned downtime and spare parts costs. The indoor-outdoor NEMA 3R enclosure minimizes weather-related failures, while UL listing streamlines compliance. Its simple 240/480 V to 120/240 V conversion supports standard control circuits, lowering total cost of ownership.