Eaton S57N11S03 General-Purpose Transformer - UL Listed
Part Number: S57N11S03
Quick Summary
The Eaton General purpose encapsulated transformer provides reliable, compact power isolation for control panels in industrial environments. Manufacturers often struggle with heat and space constraints when stepping down 575 V to 120/240 V, especially in crowded enclosures. UL Listed safety certification and NEMA 3R enclosure support reliable operation across indoor-outdoor environments. For panel builders and distributors, this transformer offers predictable performance and easier procurement within Eaton's power distribution ecosystem. Its 3 kVA rating suits light-to-medium power needs, while aluminum windings keep weight manageable. The data sheet confirms 60 Hz operation and 575 V primary with 120/240 V secondary. This combination supports straightforward installation and reduced risk in field upgrades.
Product Information
Extended Description
S57N11S03 Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 575v, taps: none, sv: 120/240v, 115°c, 3 kva, al windings, frame: 176, indoor-outdoor.
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S57N11S03
UPC
786680060595
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
66 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
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
176
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
524L
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
575 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S57N11S03
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: General specifications include a single-phase, 3 kVA transformer with a 575 V primary and 120/240 V secondary, housed in a compact frame 176. The business impact is robust voltage stepping with minimal footprint, enabling easier integration into crowded control panels and improved energy efficiency. In practice, this means faster installations and reduced wiring complexity for panel builders deploying automation systems. Feature: Encapsulated EP design and a NEMA 3R enclosure protect internal windings from dust, moisture, and temperature fluctuations. The business impact is lower maintenance costs and higher reliability, especially in environments subject to weather exposure. In application, you can deploy this transformer indoors or outdoors without changing enclosure strategies. Feature: Aluminum coil material reduces weight and material costs while maintaining conductivity. The business impact is easier handling during installation and lower logistics costs, which translates to faster project timelines. Application-ready for portable or fixed installations in automations and power distribution. Feature: Wiring connection 524L simplifies field assembly and compatibility with standard Eaton distribution components. The business impact is faster start-ups, fewer wiring errors, and improved serviceability in the field. Application areas include control cabinets and panel boards where quick retrofits are common. Feature: Temperature rise of 115 °C rise indicates strong thermal tolerance under typical loads. The business impact is improved margin for reliability in hotter environments and greater design flexibility for future expansions. Application: industrial automation and building management systems.
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FAQs
The S57N11S03 supports standard single-phase installations with a 524L wiring connection, designed to fit typical Eaton power distribution layouts. Ensure the mounting frame is secured to a compatible enclosure, followed by correct primary wiring to 575 V and secondary connections to 120/240 V. Verify UL Listed compliance on all components and maintain proper clearance for heat dissipation in enclosed spaces.
Verify: 575 V primary, 120/240 V secondary, 3 kVA rating, 60 Hz, single-phase operation, aluminum windings, and frame 176. Confirm the enclosure is NEMA 3R and suitable for indoor-outdoor installations. Also check the 524L wiring connection method and the UL Listed certification to meet safety and compatibility requirements for your panel design.
Yes. The S57N11S03 features a NEMA 3R enclosure and an Indoor-Outdoor compatibility profile, enabling reliable operation in exposed or semi-enclosed spaces. For outdoor installations, ensure proper mounting and weatherproofing of all cable entries, and follow UL-listed assembly guidelines to maintain safety margins and performance integrity.
This transformer is UL Listed, indicating conformance with recognized safety standards for electrical equipment. It also features a NEMA 3R enclosure suitable for indoor-outdoor use, supporting compliance in both controlled facilities and exterior installations. Acknowledging these certifications helps with procurement, audits, and regulatory alignment in industrial environments.
The unit uses aluminum windings and a robust encapsulated design, which contribute to lightweight handling and durable operation. A UL Listed, NEMA 3R-rated enclosure reduces weather-related maintenance needs, while a 3 kVA rating supports efficient power distribution for automation tasks. A one-year warranty further mitigates risk and supports total cost of ownership improvements.