Eaton S57M11S25 General Encapsulated Transformer - UL Listed
Part Number: S57M11S25
Quick Summary
Eaton S57M11S25 is a general encapsulated transformer delivering 25 kVA for industrial control panels. Facility constraints require rugged, compact equipment that withstands indoor-outdoor service while maintaining stable secondary voltages. UL Listed and CSA Certified configurations reinforce safety and compliance, while the NEMA 3R enclosure supports indoor-outdoor environments. Designed for reliability in power distribution, this transformer supports 575 V to 120/240 V operation with robust taps, helping control panels meet performance specs. The combination of enclosure protection, corrosion-resistant aluminum windings, and precise voltage regulation delivers real business value through reduced downtime and predictable operation for automation and process applications.
Product Information
Extended Description
S57M11S25 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 182, 60 Hz, single-phase, 575 V, 120/240 V, 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 25 KVA, indoor-outdoor, 83H
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S57M11S25
UPC
786680104084
Product Length/Depth
14.12 in
Product Height
23.31 in
Product Width
16.35 in
Product Weight
392 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 CSA Certified
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
182
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
General-purpose encapsulated transformer
Wiring connection
83H
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
575 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
25 kVA
Weathershield
Indoor-Outdoor
Feature: Encapsulated aluminum winding and EP design. Benefit: Enhanced moisture and dust resistance, resulting in longer service life and reduced maintenance for harsh factory environments. Application: Ideal for control panels and distributed automation where reliability matters. Feature: 575 V primary and 120/240 V secondary with 60 Hz single-phase operation. Benefit: Tight voltage conversion and compatibility with common US electrical distributions, improving equipment performance and reducing nuisance tripping. Application: Powering PLCs, drives, and instrumentation in manufacturing lines. Feature: 25 kVA rating with taps at 2 at +2.5% FCAN and 4 at -2.5% FCBN. Benefit: Fine-tuned voltage regulation to accommodate loading variations and supply quality concerns. Application: Panel-duty feeders and critical loads that demand stable voltages. Feature: NEMA 3R indoor-outdoor enclosure. Benefit: Robust protection against weather, humidity, and contaminants, enabling outdoor installation or rugged indoor environments. Application: Outdoor-rated control cabinets and process stations. Feature: 83H wiring and 182 frame with a weight of 392 lb. Benefit: Clear wiring topology and a proven footprint that simplifies mounting and field routing. Application: New installations and retrofit projects where space planning and weight considerations are critical. Feature: UL Listed and CSA Certified with 115 °C rise. Benefit: Strong safety compliance and predictable thermal performance to support regulatory requirements and longer maintenance intervals. Application: Compliance-driven automation projects across industrial sectors. Feature: 14.12 in length, 23.31 in height, and 16.35 in width. Benefit: Defined footprint for panel design and installation budgeting. Application: Integration into control rooms, electrical rooms, and equipment housings. Warranty and support: One-year warranty from installation or 18 months from shipment, whichever occurs first. Benefit: Clear coverage terms that reduce lifecycle risk and support planning for commissioning timelines. Application: Procurement and service planning for capital projects.
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FAQs
The S57M11S25 uses a robust 182 frame with 83H wiring and a footprint suitable for panel mounting. It weighs 392 lb, measures 14.12 in L, 23.31 in H, and 16.35 in W, and comes with a 25 kVA rating at 60 Hz. Primary and secondary connections accommodate standard industrial wiring practices, with taps at +2.5% FCAN and -2.5% FCBN to fine-tune voltage. Ideal for retrofit or new builds in control rooms and distributed panels, it simplifies installation while delivering reliable power for automation loads.
Key specs include a 575 V primary, 120/240 V secondary, 60 Hz single-phase operation, and a 25 kVA rating. It features two taps at +2.5% FCAN and four taps at -2.5% FCBN for voltage regulation. The design uses an aluminum winding and offers a 115 °C rise, supporting stable performance under varying load conditions in industrial environments.
Yes. The transformer features an indoor-outdoor NEMA 3R enclosure and is UL Listed with CSA Certification, ensuring safety and compliance for indoor and outdoor installations. Its rugged encapsulated design and tapped voltage options make it well-suited for control panels, process stations, and other distributed power applications in industrial facilities.
The encapsulated aluminum-windings design reduces exposure to moisture and contaminants, lowering maintenance needs in harsh environments. The product carries a one-year warranty from installation or an 18-month window from shipment. With a proven 25 kVA rating and robust enclosure, facilities can expect long service life and predictable operation, reducing unplanned downtime in automation systems.
Investing in the S57M11S25 yields ROI through improved reliability and reduced downtime: rugged NEMA 3R enclosure supports outdoor installation, voltage regulation with taps minimizes equipment stress, and UL/CSA certifications simplify compliance. The 25 kVA rating suits common control-panel loads, while the stable 575→120/240 V output lowers maintenance costs and extends the life of sensitive drives and instrumentation.