Eaton S20N11S81N General-Purpose Transformer - UL Listed
Part Number: S20N11S81N
Quick Summary
The Eaton S20N11S81N general-purpose transformer provides compact, isolated power for 120/240 V control circuits. Engineers often struggle with moisture intrusion, space constraints, and outdoor reliability in control panels and equipment cabinets. UL Listed certification, a NEMA 3R enclosure, and 60 Hz single-phase operation support safe, compliant installations in harsh environments. With an aluminum-wound coil and epoxy encapsulation, this transformer reduces maintenance, enables flexible wiring, and fits compact enclosures, aligning with modern automation strategies while helping to lower installation and lifecycle costs.
Product Information
Extended Description
S20N11S81N Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 52, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 0.05 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S81N
UPC
786680383007
Product Length/Depth
4 in
Product Height
8.91 in
Product Width
4.11 in
Product Weight
8 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 N
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
52
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
0.05 kVA
Weathershield
Indoor-Outdoor
Feature: compact, lightweight form factor (4 in x 4.11 in x 8.91 in; 8 lb) enables tighter panel layouts and easier field installation. Business Impact: saves valuable cabinet space, reduces handling risk, and lowers shipping and inventory costs. Application: ideal for control panels and machine enclosures in space-constrained industrial environments. Feature: 0.05 kVA rating at 60 Hz single-phase with 240/480 V primary and 120/240 V secondary. Business Impact: supports typical low-voltage control loads with minimal heat, improving reliability and reducing cooling requirements. Application: automation cabinets and distributed I/O enclosures in manufacturing lines. Feature: aluminum windings and epoxy encapsulation with NEMA 3R enclosure. Business Impact: offers corrosion resistance and moisture protection for indoor-outdoor service, reducing maintenance cycles. Application: outdoor-rated panels and harsh-environment applications in food processing, packaging, and packaging lines. Feature: UL Listed with a robust warranty (1 year from installation or 18 months from shipment). Business Impact: delivers regulatory confidence and predictable support, lowering total cost of ownership. Application: procurement for compliant, long-life power isolation in machine controls. Feature: versatile wiring and mounting compatibility (3A wiring connection; 4 in depth footprint). Business Impact: simplifies installation and retrofit projects, enabling faster commissioning. Application: retrofit into existing control panels and new equipment with standard wiring practices.
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FAQs
Install the unit in a suitable enclosure rated for indoor or outdoor use (NEMA 3R). Ensure proper clearance for cooling, secure mounting, and compliant wiring to the 3A connection. The transformer is single-phase, 60 Hz, with primary 240/480 V and secondary 120/240 V, and weighs about 8 lb for manageable handling.
Key specs include a 0.05 kVA rating, 60 Hz frequency, single-phase operation, primary voltages of 240 or 480 V, and secondary voltages of 120/240 V. The enclosure is NEMA 3R-rated, with aluminum windings and epoxy encapsulation to protect against moisture and contaminants.
Yes. The NEMA 3R enclosure plus indoor-outdoor weatherability and UL Listed certification support reliable operation outdoors when installed in protected housings. Aluminum windings and encapsulation further resist corrosion and moisture ingress, reducing maintenance needs in demanding environments.
The unit is UL Listed, confirming regulatory safety compliance for electrical devices. The enclosure rating of NEMA 3R and the 60 Hz single-phase design align with common industrial standards, supporting safe integration into control panels and outdoor equipment without additional modification.
Its compact 8 lb form factor, robust epoxy encapsulation, and aluminum windings reduce failure rates and cooling requirements, lowering maintenance. A 1-year warranty (or 18 months from shipment) provides assurance, while the UL Listing and NEMA 3R enclosure simplify procurement and long-term support in automation applications.