Eaton S27N11S51CU General-Purpose Transformer UL Listed
Part Number: S27N11S51CU
Quick Summary
Eaton general purpose encapsulated transformer provides reliable step-down and isolation for indoor and outdoor control panels. When space is tight and environments vary from harsh outdoor conditions to protected indoor spaces, engineers need a compact, rugged solution that won’t compromise safety or performance. This unit carries UL Listed certification and is designed for NEMA 3R enclosure applications, supporting durable operation across weather and installation contexts. With a 0.5 kVA rating, 277 V primary and 120/240 V secondary, it delivers dependable power with straightforward installation and broad compatibility in both Eaton and third-party panels. Copper windings and 60 Hz single-phase operation further enhance efficiency, heat management, and serviceability in continuous-duty environments.
Product Information
Extended Description
S27N11S51CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 58A, 60 Hz, single-phase, 277 V, 120/240 V, NONE, 115 °C rise, 0.5 KVA, indoor-outdoor, 524A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S27N11S51CU
UPC
786680076954
Product Length/Depth
5.75 in
Product Height
11.28 in
Product Width
5.99 in
Product Weight
17 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
Copper
Design
EP
Enclosure
NEMA 3R
Frame
58A
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
524A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
277 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
0.5 kVA
Weathershield
Indoor-Outdoor
Feature: Encapsulated epoxy-resin construction protects copper windings from moisture, dust, and vibration. Benefit: Improves long-term reliability and reduces maintenance, which lowers total cost of ownership in harsh or crowded panel spaces. Application: Widely used in automated lines and building automation where rugged enclosure integrity is critical. Feature: NEMA 3R enclosure suitability allows indoor-outdoor installation. Benefit: Seamless deployment across variable site conditions without additional weatherproofing, cutting installation time and costs. Application: Outdoor cabinets, service entrances, and control panels exposed to weather. Feature: Copper coil wiring with EP design enhances efficiency and thermal performance. Benefit: Lower losses and cooler operation for higher uptime and reduced cooling needs. Application: Continuous duty controls and power distribution in factories and distribution centers. Feature: 0.5 kVA rating with 277 V primary and 120/240 V secondary. Benefit: Flexible cross-loading for single-phase distribution with standard building power, enabling easy integration into existing panels. Application: Industrial automation cabinets, vending systems, and light-macros. Feature: 60 Hz operation with a compact footprint (5.75 in L, 5.99 in W, 11.28 in H) and 17 lb weight. Benefit: Space-efficient installation in tight control-panels and mobile equipment carts, with straightforward mounting. Application: Retrofit projects and new builds in compact electrical rooms. Feature: UL Listed certification and documented warranty support provide compliance and confidence. Benefit: Helps meet safety programs and procurement standards while ensuring after-sales service alignment. Application: Facility compliance packages and OEM panel builds.
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FAQs
This model uses a 277 V primary voltage and provides a 120/240 V secondary output. It is a single-phase device designed for 60 Hz operation, suitable for standard distribution and panel board applications in automation and building management systems.
Yes. The transformer is designed with an indoor-outdoor capability and a NEMA 3R enclosure rating, making it appropriate for outdoor use in protected environments as well as indoor panels, reducing the need for additional weatherproofing.
The unit is UL Listed, providing recognized safety certification for electrical equipment. Its robust enclosure and copper-wound EP design support compliance with typical industrial safety standards, installation practices, and panel-building requirements.
With dimensions of 5.75 in L x 5.99 in W x 11.28 in H and a weight of 17 lb, the S27N11S51CU is compact and easy to mount in tight electrical closets or panel racks. Copper windings and a front-access wiring connection (524A) simplify wiring, reduce install time, and improve serviceability.
The product carries Eaton's warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This policy supports ongoing maintenance planning and provides a clear basis for ROI calculations in panel upgrades and replacements.