Eaton S20N11S03CULS42 General-Purpose Transformer - UL
Part Number: S20N11S03CULS42
Quick Summary
Eaton S20N11S03CULS42 transformer delivers reliable single-phase power for control panels and distributed power systems. In harsh environments, you need a rugged, UL-listed unit that tolerates outdoor installation without compromising reliability, service life, or maintenance costs. Featuring a NEMA 3R enclosure, copper windings, 60 Hz operation, and a 3 kVA rating, it also maintains a low 42 dB sound profile. Indoor-outdoor compatibility and a compact frame streamline installation, reduce enclosure footprints, and translate into lower site labor, warranty exposure, and long-term total cost of ownership.
Product Information
Extended Description
S20N11S03CULS42 Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 176, 60 Hz, low sound 42 dB, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S03CULS42
UPC
786680080791
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
72 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
Low sound equal to 42 dB
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
176
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
3 kVA
Modification 1
Low sound 42 dB
Weathershield
Indoor-Outdoor
Copper windings and encapsulated EP design enhance thermal performance and transient handling, reducing core losses and enabling stable output under load swings. The 3 kVA rating paired with 240/480 V primary and 120/240 V secondary delivers flexible power distribution for industrial control circuits, while the 60 Hz single-phase topology supports common plant systems. NEMA 3R enclosure and indoor-outdoor capability simplify installation in variable environments, minimizing protection-system integration concerns. The compact 176 frame with dimensions of 8 in depth, 14.25 in height, and 7.69 in width enables easier panel integration and saves footprint in crowded control rooms. Copper windings also contribute to lower long-term maintenance costs due to durability and resistance to overheating, supporting a lower total cost of ownership. The unit’s 42 dB low-noise profile and UL listing reassure compliance teams and operators alike, reducing site noise concerns and expediting procurement.
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FAQs
Begin with mounting the 176 frame on a rigid surface and align clearances per enclosure guidelines. Wire the primary to 240 or 480 V and connect the secondary to 120/240 V circuits using the 3A wiring configuration. Ensure the NEMA 3R enclosure is sealed against moisture and that the unit is properly grounded. Consider ambient conditions and plan for adequate ventilation to maintain the 115 °C rise rating without overheating.
The transformer is a single-phase, 3 kVA unit operating at 60 Hz. Primary voltage options are 240 V or 480 V, with a secondary of 120/240 V. Copper windings provide low resistive losses and good thermal performance. The enclosure supports indoor-outdoor use (NEMA 3R), and the device has a low-noise profile of 42 dB.
Yes. The S20N11S03CULS42 uses a NEMA 3R enclosure designed for indoor-outdoor service, copper windings for durability, and a low sound level of 42 dB. It is UL Listed, meeting safety and performance standards for industrial control applications in challenging environments.
The transformer is UL Listed, indicating compliance with safety standards. It carries Eaton’s warranty policy of one year from installation or eighteen months from shipment, whichever occurs first. The UL listing and warranty support procurement decisions and maintenance planning for long-term reliability.
Dimensions are 8 in (depth) by 14.25 in (height) by 7.69 in (width), with a frame size of 176. The unit weighs 72 lb, which informs rack or panel cutouts, mounting hardware requirements, and ship/installation handling considerations for site teams.