Eaton S20P11B03CUSS4X Transformer - UL Listed
Part Number: S20P11B03CUSS4X
Quick Summary
Eaton S20P11B03CUSS4X is a general purpose encapsulated transformer that provides reliable power conversion for control panels and industrial equipment. Engineers and procurement teams often struggle with limited panel space, voltage Regulation under load, and outdoor exposure in demanding environments. Certifications like UL Listed, a NEMA 3R enclosure, and an optional 4X stainless steel rating help meet safety and environmental requirements. With a 3 kVA rating, copper windings, 60 Hz operation, and dual primary/secondary voltages of 240/480 V and 120/240 V, it delivers consistent performance in a compact footprint. These features translate to easier installation, reduced wiring complexity, and lower lifecycle costs for machine builders and system integrators.
Product Information
Extended Description
S20P11B03CUSS4X Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, 80 °C rise, 3 KVA, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11B03CUSS4X
UPC
786680086380
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.001 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 with NEMA 4X rating
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
80 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
The S20P11B03CUSS4X employs an epoxy encapsulated (EP) design with copper windings to resist moisture ingress and vibration, improving reliability in harsh environments. This feature enables a smaller footprint without sacrificing power capability, delivering predictable performance for panel boards and motor control centers, reducing field service calls and maintenance costs. The 3 kVA rating at 60 Hz supports a wide range of control circuits and instrumentation, while the copper windings improve efficiency and thermal performance, lowering energy losses and cooling requirements in compact installations. Tap sizing options of 1 at +5% FCAN, 2 at -5% FCBN, 2 at +2.5% FCAN, and 4 at -2.5% FCBN provide voltage regulation to accommodate grid fluctuations and supply tolerance, reducing nuisance tripping and improving control accuracy. The NEMA 3R enclosure delivers environmental protection for indoor-outdoor use, and the catalog notes indicate a Grade 304 stainless steel enclosure with NEMA 4X rating for harsher environments, offering corrosion resistance and longer service intervals. UL Listed certification supports compliance with safety standards, easing procurement and installation audits. Together, these features support faster installation, improved panel density, and a lower total cost of ownership for industrial automation applications, including machine controls, process instrumentation, and lighting panels. The design also aligns with industry expectations for rugged reliability, making it a practical choice for retrofit projects and new builds alike.
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FAQs
The S20P11B03CUSS4X is designed for indoor-outdoor use with a NEMA 3R enclosure; ensure the mounting surface supports the weight and aligns with clearance for wiring. Utilize the provided voltage taps to compensate for voltage variation and connect primary to 240/480 V and secondary to 120/240 V circuits. Verify UL Listed compliance in your panel assembly and observe the 60 Hz operating requirement.
Yes, the standard enclosure is NEMA 3R and rated for indoor-outdoor use. For harsher environments, Eaton notes a Grade 304 stainless steel enclosure with NEMA 4X rating available, providing enhanced corrosion resistance and protection against weather, dust, and wash-down conditions.
Tap options include 1 at +5% FCAN, 2 at -5% FCBN, 2 at +2.5% FCAN, and 4 at -2.5% FCBN. These taps allow adjustment for voltage regulation under loading and grid fluctuations, helping maintain stable secondary voltage (120/240 V) from different primary supply conditions and reducing the risk of over- or under-voltage in downstream equipment.
The S20P11B03CUSS4X is UL Listed, which simplifies safety compliance in many regions. It carries a 3 kVA rating with copper windings and EP encapsulation, and its enclosure options (NEMA 3R standard, with optional 4X stainless steel) support environmental and installation requirements common in industrial automation, motor control centers, and panel assemblies.
With copper windings, an 80 °C rise rating, and robust enclosure options, this transformer delivers reliable power with low thermal losses and extended service life. The UL Listed certification reduces commissioning risk, while the compact footprint and voltage-tap versatility lower wiring complexity and installation time, contributing to reduced maintenance costs and faster project timelines.