Eaton S20M11S25CUSS4X General-Purpose Transformer - UL Listed
Part Number: S20M11S25CUSS4X
Quick Summary
Eaton S20M11S25CUSS4X is a general-purpose encapsulated transformer designed for reliable power distribution in industrial facilities. Many facilities struggle to find a compact, weather-resistant unit that meets voltage flexibility and code requirements. This model combines UL Listed certification with a Grade 304 stainless steel enclosure featuring NEMA 3R and 4X-rated options, ready for indoor-outdoor service. With a 25 kVA rating and copper windings, it supports 240/480 V primary and 120/240 V secondary while offering 60 Hz operation. The unit’s dual tap arrangement (+2.5% FCAN, -2.5% FCBN) simplifies site voltage regulation, reducing installation time and inventory needs without compromising performance or compliance.
Product Information
Extended Description
S20M11S25CUSS4X Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 25 KVA, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20M11S25CUSS4X
UPC
786680079818
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
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
115 °C rise
Volt ampere rating
25 kVA
Weathershield
Indoor-Outdoor
Feature: Copper windings and an epoxy-encapsulated design. Business Impact: Improved current carrying capability and thermal performance, leading to higher efficiency and longer service life in demanding environments. Application: Ideal for continuous duty in manufacturing floors and electrical rooms. Feature: 60 Hz, single-phase operation rated at 25 kVA. Business Impact: Predictable load handling with minimal voltage drop, supporting reliable equipment operation. Application: Suitable for general-purpose distribution in light-industrial settings. Feature: Tap settings 2 at +2.5% FCAN and 4 at -2.5% FCBN. Business Impact: Enhanced voltage regulation to compensate supply swings, reducing equipment stress and nuisance trips. Application: Critical in facilities with fluctuating service feeds. Feature: NEMA 3R enclosure with optional Grade 304 stainless steel enclosure and 4X rating. Business Impact: Superior corrosion resistance and outdoor durability, lowering maintenance costs. Application: Indoor-outdoor installations or damp environments. Feature: Weathershield indoor-outdoor rating and copper coil construction. Business Impact: Robust protection against contaminants and moisture, enabling mounting in mixed-use spaces. Application: Plants, data centers, and process control panels requiring endurance. Feature: UL Listed certification and specified dimensions with 25 kVA power rating. Business Impact: Clear compliance with safety standards and straightforward procurement. Application: Projects requiring recognized certification and consistent performance for building services and distribution networks.
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FAQs
The S20M11S25CUSS4X is designed for 240 V or 480 V primary input and provides 120/240 V secondary outputs. With single-phase operation at 60 Hz and copper windings, it delivers 25 kVA with reliable regulation. The dual primary/dual secondary arrangement supports common facility loads and simplifies distribution across panels while maintaining compliance with UL standards.
This transformer provides taps at +2.5% FCAN and -2.5% FCBN, allowing precise voltage regulation to mitigate supply swings and protect sensitive equipment. In practical terms, technicians can fine-tune secondary voltage to maintain steady load performance, reduce nuisance trips, and improve overall process stability in plants or data centers.
Yes. The unit features a NEMA 3R enclosure with Weathershield indoor-outdoor ratings and a Grade 304 stainless steel enclosure option with a 4X rating, providing corrosion resistance and outdoor durability. This makes it well suited for manufacturing floors adjacent to loading docks or outdoor equipment rooms where weather exposure occurs.
The transformer is UL Listed, reflecting compliance with recognized safety standards. Its copper windings, epoxy encapsulation, and enclosure configurations (NEMA 3R and optional 4X stainless steel) support regulatory requirements for industrial power distribution, reduce risk of electrical faults, and help streamline spec verification during audits and inspections.
Eaton provides a warranty aligned with policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This coverage supports equipment uptime and reduces unexpected maintenance costs. Combined with robust enclosure and long service life, the transformer delivers a favorable total cost of ownership for mid- to large-scale distribution projects.