Eaton S57N11S05 Encapsulated transformer - UL-listed
Part Number: S57N11S05
Quick Summary
The Eaton S57N11S05 encapsulated transformer provides compact single-phase power isolation for distribution panels. Engineers often wrestle with limited space, harsh environments, and restricted maintenance access in enclosed electrical rooms. UL Listed certification anchors safety, and the unit is designed for indoor-outdoor use with aluminum windings and a 5 kVA rating. The encapsulated construction limits dust ingress and moisture exposure, while a compact footprint simplifies retrofits in crowded switchgear and control panels. This combination delivers faster installation, reliable operation, and lower lifecycle costs for commercial and light-industrial applications.
Product Information
Extended Description
S57N11S05 Eaton: Eaton General purpose encapsulated transformer, EP, Single-phase, PV: 575V, Taps: None, SV: 120/240V, 115°C, 5 kVA, AL windings, Indoor-Outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S57N11S05
UPC
786680223167
Product Length/Depth
1.1 in
Product Height
1.1 in
Product Width
1.1 in
Product Weight
1.1 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.
Compliances
Not Applicable
Certifications
UL Listed
Coil material
Aluminum
Kva Rating
5 kVA
Phase
Single-phase
Temperature rise
115 °C rise
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S57N11S05
Selling Policy 25-000 - Distribution and Control Products and Services
Encapsulated construction provides rugged protection for windings and coils, guarding against dust, moisture, and incidental impact. In turn, this reduces field failures, simplifies containment in cramped cabinets, and enhances operator safety. The transformer is well-suited for control panels and outdoor equipment enclosures where exposure to the elements would otherwise be a concern. With a 5 kVA rating and single-phase operation, the unit meets common panel-feed requirements while keeping wiring straightforward. The primary PV is 575 V and the secondary SV is 120/240 V, enabling safe step-down in distribution points and machine interfaces, which minimizes design rework and supports faster project timelines. Aluminum windings reduce weight and improve thermal performance, easing installation and service. The 115 °C rise rating provides a reliable margin for moderate ambient conditions, helping avoid derating and lowering cooling costs over the life of the install. Indoor-outdoor suitability and UL Listed certification offer installation flexibility and safety assurance, while the no-taps design reduces maintenance and field configurability. Compatibility with standard Eaton catalogs and straightforward mounting make this transformer a drop-in option for many panel builders, delivering a solid ROI through uptime and predictable maintenance.
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FAQs
The S57N11S05 uses a compact encapsulated design with aluminum windings and a 5 kVA rating, suitable for indoor or outdoor panel environments. It features a 575 V primary and 120/240 V secondary with no taps, simplifying wiring. Weight is light at approximately 1.1 lb, and dimensions are minimal, aiding fitment in crowded switchgear and control cabinets.
Key specs include 5 kVA rating, single-phase operation, PV 575 V, SV 120/240 V, aluminum windings, and a 115 °C rise. The unit has no taps and is UL Listed. Verify enclosure availability for indoor-outdoor use and confirm your panel’s load requirements align with a 5 kVA transformer to avoid overloads.
Yes. The encapsulated construction provides robust protection against dust and moisture, making it suitable for outdoor or partially protected indoor panels. Its UL Listed certification supports safety compliance, and the compact form factor facilitates installation in tight spaces common to machine control panels and distribution boards.
The product carries UL Listed certification, indicating adherence to safety standards. While the data does not list CE or IP ratings, the unit is designed for indoor-outdoor use and encapsulated to resist environmental exposure, which supports regulatory compliance for many commercial and light-industrial applications.
The transformer follows Eaton Selling Policy 25-000 with a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This warranty framework, combined with standard Eaton support channels, helps minimize downtime, plan maintenance, and protect initial ROI across project lifecycles.