Eaton S20N11S05SS Encapsulated Transformer - UL Listed
Part Number: S20N11S05SS
Quick Summary
Eaton S20N11S05SS encapsulated transformer provides reliable single-phase power isolation for industrial controls. In harsh environments, traditional transformers expose windings to moisture and dust, increasing maintenance and downtime. UL Listed safety certification, a NEMA 3R enclosure for indoor-outdoor use, and a Grade 304 stainless steel enclosure option reinforce compliance and durability across demanding facilities and outdoor environments. With a 5 kVA rating, 240/480 V primary and 120/240 V secondary, this EP design supports efficient, localized power for automation panels, control cabinets, and remote equipment. These features translate to faster installation, reduced wiring complexity, lower lifecycle costs, and improved uptime for critical manufacturing lines.
Product Information
Extended Description
S20N11S05SS Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 240 x 480v, taps: none, frame: 177, indoor-outdoor, sv: 120/240v, 115°c, 5 kva, al windings
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S05SS
UPC
786680000089
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
118 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
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
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
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated design with aluminum windings provides rugged protection against moisture and dust. Impact: Enhances reliability in crowded electrical rooms and harsh plant floors, reducing unplanned outages. Application: Ideal for control panels in manufacturing and packaging lines where space is at a premium. Feature: 5 kVA power rating at 60 Hz supports consistent voltage conversion for multiple automation components. Impact: Lowers energy losses and ensures stable control voltages, boosting machine performance. Application: Local power supply for PLCs, relays, and motor starters. Feature: Primary 240/480 V and secondary 120/240 V configuration enables flexible integration with existing plant voltages. Impact: Simplifies wiring schemes and minimizes step-down conversions, accelerating installation. Application: Plant-wide power distribution in automation networks. Feature: Indoor-outdoor Weathershield with NEMA 3R enclosure and Grade 304 stainless steel notes provide corrosion resistance. Impact: Extends service life in dusty or humid environments and reduces maintenance cycles. Application: Outdoor equipment enclosures, washdown areas, and exposed control zones. Feature: UL Listed certification and EP design emphasize safety and regulatory compliance. Impact: Mitigates risk during audits and supports facility standardization. Application: Electrical safety compliance across industrial facilities. Feature: Frame 177 and 115°C rise rating indicate robust thermal performance. Impact: Maintains performance under peak load without overheating. Application: High-demand control panels and safety circuits in continuous operation.
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FAQs
Install the unit in a properly rated enclosure, ensure adequate clearance for cooling, and mount using standard hardware. Use the 3A wiring connection as specified, connect 240/480 V primary and 120/240 V secondary circuits, and follow the UL Listed safety guidelines. Verify mounting surface is level and doors remain closed during operation to maintain IP/NEMA ratings.
The transformer is a 5 kVA, single-phase device with a 60 Hz frequency rating. Primary voltage options are 240 V or 480 V, and secondary voltage is 120/240 V. It features aluminum windings, a frame size of 177, and a temperature rise of 115 °C, designed for reliable operation in demanding environments.
Yes. It supports indoor-outdoor use with an indoor-outdoor Weathershield and a NEMA 3R enclosure rating, plus optional Grade 304 stainless steel enclosure for additional corrosion resistance in harsh environments. This makes it a strong fit for outdoor control cabinets, machine rooms exposed to dust or humidity, and washdown zones.
The transformer is UL Listed, meeting essential electrical safety standards for industrial equipment. This certification reduces commissioning risk, simplifies supplier audits, and helps ensure regulatory compliance across plant floors operating under strict safety regimes.
The unit carries Eaton’s warranty policy of one year from installation or eighteen months from shipment, whichever occurs first. Coupled with the corrosion-resistant enclosure and robust encapsulation, this translates to lower maintenance costs and higher uptime for critical automation infrastructure.