Eaton S40N14S03N General-Purpose Encapsulated Transformer - UL Listed
Part Number: S40N14S03N
Quick Summary
Eaton general-purpose encapsulated transformer powers control panels and auxiliary circuits in demanding industrial environments. This single-phase unit addresses common space, cooling, and wiring challenges by delivering reliable power in a compact footprint. UL Listed certification, a NEMA 3R enclosure, and a 115°C rise support safe, durable operation across indoor and outdoor installations. With a 3 kVA rating and aluminum windings, it delivers robust performance while reducing wiring complexity. The wide primary voltage range of 190–440 V and a 110/220 V secondary provide flexible compatibility for diverse control loads, enabling faster deployment, easier stocking, and lower total cost of ownership for industrial power distribution applications.
Product Information
Extended Description
S40N14S03N Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 190/200/208/220 x 380/400/416/440v, taps: none, sv: 110/220v, 115°c, 3 kva, al windings, frame: 177, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S40N14S03N
UPC
786680109393
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
113 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
Catalog Notes
Model N
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
177
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
538A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
190 V, 200 V, 208 V, 220 V, 380 V, 400 V, 416 V, 440 V
Secondary Voltage
110/220 V
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S40N14S03N
Selling Policy 25-000 - Distribution and Control Products and Services
The S40N14S03N offers a 3 kVA single-phase transformer with aluminum windings, delivering steady voltage conversion from a broad primary range to a stable 110/220 V secondary. This translates to reliable control circuits and panel power without overdesign. The enclosure is designed for indoor-outdoor use (NEMA 3R), enabling installation near exterior equipment with minimal separate housings and reduced space requirements. With a 9.89 inch depth, 16 inch height, and 10.38 inch width, the unit fits compact control rooms or equipment bays while maintaining accessibility for service. The UL Listed certification ensures electrical safety and compliance, reducing commissioning risk and facilitating downstream approvals. Designed for 60 Hz systems, it suits standard factory power rails and motor control centers, delivering predictable performance at a lower total cost of ownership. The transformer’s insulation and temperature rise specification support stable operation in hotter environments common to process lines and manufacturing floors. This combination of rugged construction and straightforward installation makes it an attractive choice for control panel builders and equipment manufacturers seeking dependable, ready-to-install power conversion.
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FAQs
This transformer is designed for indoor-outdoor use with a NEMA 3R enclosure, enabling external mounting near outdoor equipment. Its compact dimensions (9.89 in D, 16 in H, 10.38 in W) and 113 lb weight support wall or rack mounting in tight control rooms. Use the 538A wiring connection and plan for 60 Hz service. Ensure proper clearance for cooling and venting, and verify the primary voltage is selected within 190–440 V to match the site supply.
The unit is a 3 kVA single-phase transformer with primary voltages of 190/200/208/220/380/400/416/440 V and a secondary of 110/220 V. It operates at 60 Hz with a 115°C rise, making it suitable for standard industrial power distribution and control circuits. There are no taps, and the winding material is aluminum, contributing to overall weight and cost considerations.
Yes. The transformer features a NEMA 3R enclosure and indoor-outdoor weathershield designation, allowing safe operation in outdoor or semi-exposed environments. This reduces the need for additional protective housings and simplifies installation near exterior equipment while maintaining electrical safety and reliability in varying weather conditions.
The S40N14S03N is UL Listed, providing verified safety and compliance for electrical equipment used in industrial settings. This certification helps with regulatory approvals, insurance underwriting, and customer acceptance. Together with its NEMA 3R enclosure and 115°C rise specification, the transformer meets common industry requirements for rugged, safe operation in challenging environments.
A encapsulated design reduces core maintenance and contamination risk, while the single-piece construction lowers installation time and field troubleshooting costs. With a 3 kVA rating and aluminum windings, it offers durable, efficient power conversion for control panels, helping to minimize energy losses and downtime. The included warranty supports risk management during early deployment and commissioning.