Eaton S20N11E05A General-Purpose Transformer - UL Listed
Part Number: S20N11E05A
Quick Summary
The Eaton S20N11E05A general-purpose encapsulated transformer powers control panels and industrial equipment with reliable isolation. A common challenge in automation is protecting sensitive electronics from moisture, dust, and voltage transients in varying environments. UL Listed for safety and housed in a NEMA 3R enclosure, its indoor-outdoor design supports rugged plant floors and outdoor installations. This 5 kVA transformer offers versatile voltage conversion with primary 240/480 V and secondary 120/240 V at 60 Hz, simplifying procurement and integration. By aligning with Eaton's power management ecosystem, it delivers dependable performance, scalable installation, and long-term cost savings for facility operators and integrators.
Product Information
Extended Description
S20N11E05A Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 90A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11E05A
UPC
786680104640
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
109 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
177
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
5 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature aluminum coil and encapsulated EP design improves heat dissipation and provides robust moisture resistance, reducing insulation degradation and downtime in harsh environments. Business impact: longer service intervals, lower maintenance costs, and higher availability for critical lines such as packaging, material handling, and automation controls. Application: control panels and machine enclosures in manufacturing lines where reliability is essential. Feature NEMA 3R enclosure offers weatherproof protection for indoor-outdoor installation, enabling reliable operation across plant fronts and outdoor equipment—reducing the need for separate weatherproof housings and accelerating installation. Application: outdoor transformer stations, loading docks, and mixed-use facilities where space optimization matters. Feature 60 Hz single-phase design with a 5 kVA rating and dual primary/secondary voltages (240/480 V to 120/240 V) delivers flexible power conversion, simplifying stocking and engineering design. Business impact: fewer part numbers, faster wiring, and smoother integration with existing control architectures. Application: general-purpose power distribution in panels, conveyors, and machine controls. Feature 115 °C temperature rise supports sustained operation under moderate heat, improving reliability in duty cycles typical of automation lines. Business impact: improved protection against heat-related derating and extended life under continuous operation. Application: industrial environments with limited cooling or high ambient temperatures. Feature aluminum winding and 90A wiring connection contribute to a lighter yet rugged unit, enhancing handling during installation and reducing cabinet loading. Application: installations with space and weight constraints. Feature UL Listed certification provides safety validation for procurement and compliance reviews, while the compact enclosure and model notes (Model A) streamline documentation. Application: purchase approvals and integration audits in regulated facilities.
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FAQs
Install with the NEMA 3R-rated enclosure to protect against moisture and dust. Ensure proper clearance for heat dissipation and access to the 90A wiring connection. The unit is designed for indoor-outdoor use and should be mounted in a location compliant with local electrical codes and Eaton installation notes (Model A).
It is a single-phase, 60 Hz transformer rated 5 kVA, with primary voltages of 240 V and 480 V and secondary voltages of 120/240 V. The enclosure supports indoor-outdoor service, and the coil is aluminum. Temperature rise is 115 °C, and the unit is UL Listed for safety.
Yes. The NEMA 3R enclosure provides weather resistance for indoor-outdoor installations, making it suitable for outdoor control panels, equipment pads, and other exposed locations without needing extra weatherproof housings.
The transformer is UL Listed, which supports safety compliance for procurement and installation in regulated facilities. Its indoor-outdoor rating (NEMA 3R) and general-purpose encapsulated design further aid in meeting industry standards for reliability and environmental performance in industrial power distribution.
The encapsulated design with aluminum windings and a rugged enclosure reduces insulation issues and environmental degradation, lowering maintenance frequency. The 5 kVA rating supports flexible load distribution, potentially reducing spare parts inventory and improving uptime, contributing to a favorable total cost of ownership over the service life.