Eaton S20M11S25SS4X General-Purpose Transformer - UL
Part Number: S20M11S25SS4X
Quick Summary
Eaton S20M11S25SS4X general-purpose encapsulated transformer is designed to convert 240/480 V to 120/240 V for control panels and outdoor equipment. Engineers often struggle with space constraints and environmental exposure; this unit's encapsulated aluminum coil construction supports reliable operation in demanding settings. It carries UL Listed certification and a NEMA 3R enclosure, with catalog notes indicating Grade 304 stainless steel enclosure options and a NEMA 4X rating for enhanced protection. For procurement, the 25 kVA rating and multiple voltage taps enable precise on-site voltage matching, while the indoor-outdoor Weathershield adds installation flexibility across facilities and OEM applications.
Product Information
Extended Description
S20M11S25SS4X Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, 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
S20M11S25SS4X
UPC
786680079948
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
Aluminum
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 → Business Impact → Application: The encapsulated design protects windings and insulation from dust, moisture, and vibration, reducing maintenance cycles in harsh environments and extending service life in remote installations. This translates to lower total cost of ownership for facility managers and OEMs deploying power conversion in rugged locations. Feature → Business Impact → Application: Aluminum coil materials reduce transformer weight by comparison to copper windings, improving installation ergonomics and enabling simpler crane-free mounting in tight electrical rooms and on equipment racks. Feature → Business Impact → Application: 25 kVA power rating with 60 Hz single-phase operation delivers reliable secondary voltages for motor starters, PLCs, and control circuits, ensuring consistent performance in machine controls and distribution panels. Feature → Business Impact → Application: Tap changes at 2 at +2.5% FCAN and 4 at -2.5% FCBN provide practical voltage regulation to compensate for line drop and load variation, which is crucial for sensitive electronics and instrumentation. Feature → Business Impact → Application: NEMA 3R indoor-outdoor enclosure with weather-shield protection supports outdoor installations and facilities where environmental exposure is a concern, reducing enclosure upgrades and enabling flexible site selection. Feature → Business Impact → Application: UL Listed certification ensures compliance with electrical safety standards and facilitates adoption in regulated industries, streamlining procurement, audits, and maintenance planning.
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FAQs
For outdoor or damp indoor environments, install the S20M11S25SS4X in a compliant panel or enclosure that provides the NEMA 3R rating. Ensure adequate clearance for ventilation and taps, and verify the 240/480 V primary connections with 120/240 V secondary outputs. The unit supports 60 Hz operation and has accessible voltage-tap options to compensate for line voltage variance.
Key specs include a 25 kVA rating, single-phase operation at 60 Hz, primary voltage options of 240 V or 480 V, and a secondary of 120/240 V. It also features voltage taps: 2 at +2.5% FCAN and 4 at -2.5% FCBN, with an 115 °C temperature rise, enabling stable performance in fluctuating load conditions.
Yes. The S20M11S25SS4X is UL Listed and designed with a NEMA 3R enclosure suitable for indoor-outdoor applications. Catalog notes also reference Grade 304 stainless steel enclosure with a NEMA 4X rating, offering additional protection for highly corrosive environments while maintaining indoor-outdoor versatility.
Ideal for control panels, motor control centers, and power distribution in industrial facilities, the S20M11S25SS4X supports reliable 120/240 V secondary power from 240/480 V sources. Its rugged enclosure and voltage-tap flexibility make it suitable for machine automation, outdoor equipment, and greenfield or retrofit projects demanding durable power conversion.
Minimal maintenance is required due to encapsulated construction and robust enclosure, lowering downtime. The aluminum winding and reliable 25 kVA rating support long service life with predictable performance, reducing replacement frequency. The UL Listing and robust enclosure also simplify compliance audits and total cost of ownership for facilities and OEMs.