Eaton S20N11E03A Transformer - EP Aluminum, UL Listed
Part Number: S20N11E03A
Quick Summary
The Eaton S20N11E03A is a general purpose encapsulated transformer for control panels and equipment. Engineers often struggle with reliability, weather exposure, and installation compatibility in mixed environments. This model is UL Listed and features a NEMA 3R enclosure, providing dependable protection and safety. Designed for indoor-outdoor use in industrial settings, it supports power distribution with a compact footprint, helping streamline panel design while meeting code requirements. For reliability and ease of installation, the S20N11E03A enables efficient, compliant power conversion in automation, manufacturing, and equipment rooms.
Product Information
Extended Description
S20N11E03A Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 176, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 90A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11E03A
UPC
786680104626
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
65 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
Model A
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
176
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
90A
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
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature: General purpose encapsulated design with aluminum coil; Business Impact: Reduces corrosion risk and weight, enabling easier handling and installation while maintaining electrical performance; Application: Suitable for compact control panels in both indoor and outdoor environments, improving site flexibility. Feature: NEMA 3R enclosure and EP design; Business Impact: Delivers weather-resistant protection against dust, rain, and humidity, lowering downtime and maintenance costs; Application: Outdoor-rated installations and damp locations in automation facilities. Feature: 3 kVA, 60 Hz, single-phase; Business Impact: Delivers reliable, scalable power conversion for a range of automation loads without oversizing; Application: Panel boards and machine control gear needing stable secondary voltage 120/240 V. Feature: Dual primary 240/480 V, secondary 120/240 V; Business Impact: Enhances installation versatility and reduces wiring complexity in mixed-voltage facilities; Application: Industrial equipment with varying supply voltages. Feature: 65 lb weight with 8 in L, 14.25 in H, 7.69 in W; Business Impact: Compact, easier mounting and serviceability in tight spaces; Application: Retrofit projects and retrofits in existing panels. Feature: UL Listed; Business Impact: Demonstrates compliance with safety standards, facilitating procurement and inspection; Application: Certified installations for manufacturing and distribution sectors. Feature: Electrostatically shielded; Business Impact: Minimized EMI/RFI interference improving control accuracy; Application: Sensitive automation systems and PLC-based architectures.
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FAQs
To install the S20N11E03A in mixed-voltage environments, validate primary voltage options (240 V or 480 V) and connect the corresponding primary lead configuration per Eaton installation instructions. Use proper lockout-tagout procedures, ensure the secondary is correctly wired to 120/240 V loads, and verify the 90 A wiring connection rating aligns with feed and load cables. In outdoor or damp settings, ensure the NEMA 3R enclosure is properly sealed and grounded to prevent moisture ingress and ensure safe operation.
Key specifications include a 3 kVA VA rating, 60 Hz frequency, single-phase configuration, primary voltage of 240 V or 480 V, and secondary voltage of 120/240 V. The unit features a 115 °C rise and a 65 lb weight with dimensions of roughly 8 in length, 14.25 in height, and 7.69 in width. It also carries UL Listed certification and a 90 A wiring connection rating for installation compatibility.
Yes. The S20N11E03A uses a NEMA 3R enclosure designed for indoor-outdoor use and weather resistance. This makes it well-suited for outdoor control panels and damp environments, reducing corrosion risk and the need for additional weatherproofing. Ensure proper mounting, ventilation where required, and adherence to local codes for outdoor electrical equipment.
The transformer is UL Listed, ensuring compliance with recognized safety standards. It also features a NEMA 3R enclosure suitable for indoor-outdoor applications, providing protection against rain and dust. These certifications support procurement for regulated industries and simplify commissioning in manufacturing, processing, and distribution environments.
Maintenance is typically minimal due to its encapsulated construction and robust enclosure, reducing ingress-related failures. Regular inspection of connections, enclosure seals, and mounting hardware is recommended. ROI is driven by reliability in mixed environments, reduced downtime from weather exposure, and lower wiring complexity thanks to dual primary/secondary configurations and a compact footprint suitable for retrofit projects.