Eaton S27N12S03 General-Purpose Encapsulated Transformer - UL Listed
Part Number: S27N12S03
Quick Summary
S27N12S03 is a general-purpose encapsulated transformer that delivers 277 V to 120 V power for commercial and industrial equipment. But a compact, weather-rated enclosure reduces installation complexity and protects critical circuitry in demanding spaces. UL Listed certification ensures safety and reliability, while the NEMA 3R enclosure supports indoor-outdoor service in varying climates. With aluminum coil construction and a robust EP design, this Eaton transformer provides dependable performance across 60 Hz single-phase applications, promoting consistent lighting, controls, and small-machine power. By integrating this transformer into your power distribution strategy, you gain improved system resilience and reduced maintenance, enabling your facilities to run more efficiently and with fewer unplanned downtime events.
Product Information
Extended Description
S27N12S03 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 176, 60 Hz, single-phase, 277 V, 120 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 511DD
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S27N12S03
UPC
786680087844
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
75 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
511DD
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
277 V
Secondary Voltage
120 V
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated EP design with aluminum coil and a 3 kVA rating. Business impact: Delivers reliable power with efficient heat management, reducing maintenance cycles and downtime. Application: Suitable for lighting, controls, and small equipment power in commercial spaces. Feature: NEMA 3R enclosure with indoor-outdoor capability. Business impact: Weather-resistant protection minimizes enclosure upgrades and allows outdoor installations near loading docks or exterior control cabinets. Application: Outdoor panels and weather-exposed mechanical rooms. Feature: 277 V primary and 120 V secondary with 60 Hz single-phase operation (3 kVA). Business impact: Simplifies integration with standard building distribution while preserving clean, stable voltage for controls and lighting. Application: Control panels, motors, and small-machine circuits. Feature: Aluminum coil and epoxy encapsulation (EP) design. Business impact: Improved corrosion resistance and moisture protection, extending service life in harsh environments. Application: Industrial facilities with challenging climates. Feature: 176 frame, 8 in length, 14.25 in height, 7.69 in width; 75 lb weight; 511DD wiring connection. Business impact: Easy fit into existing racks and equipment holds; straightforward installation and low secondary wiring complexity. Application: Retrofit projects and new builds with tight installation tolerances. Feature: UL Listed and Weathershield Indoor-Outdoor; no taps to configure. Business impact: Compliance assurance and reduced field configuration errors, lowering operational risk. Application: Compliance-driven facilities and multi-product EMS environments. By focusing on these design traits, the S27N12S03 supports efficiency gains, cost reduction, and predictable maintenance cycles across industrial power-distribution ecosystems.
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FAQs
The S27N12S03 uses a 511DD wiring connection and a 176 frame with dimensions of 8 in x 14.25 in x 7.69 in, making it a straightforward drop-in for many standard control panels. Its NEMA 3R enclosure supports indoor-outdoor mounting, while UL Listing provides confidence in electrical safety and performance within commercial and industrial enclosures.
This transformer is rated for a primary voltage of 277 V and a secondary voltage of 120 V, operating at 60 Hz single-phase with a 3 kVA rating. It is designed to deliver stable, regulated low-voltage power to controls, lighting, and small machines in industrial environments.
Yes. The unit features a NEMA 3R enclosure with Weathershield indoor-outdoor capability and an encapsulated aluminum-coil design, providing resistance to moisture and corrosion. UL Listed certification further supports outdoor usage in compliant installations, reducing the need for additional weatherproofing or enclosure upgrades.
The encapsulated EP design minimizes moisture ingress and reduces oil leakage risk, lowering maintenance needs. The transformer has a 3 kVA rating with no taps and a standard 60 Hz single-phase operation. Warranty terms are 1 year from installation or 18 months from shipment, whichever occurs first, supporting total-cost-of-ownership clarity.
With a weight of 75 lb and a footprint of 8 x 14.25 x 7.69 inches, the S27N12S03 is manageable for standard electrical installation teams using common lifting practices. The 511DD wiring connection and UL Listed status simplify wiring and compliance, while the indoor-outdoor capability minimizes additional protective measures in mixed environments.