Eaton S40N11S03 General-Purpose Transformer - UL Listed
Part Number: S40N11S03
Quick Summary
The Eaton S40N11S03 general purpose encapsulated transformer provides reliable voltage conversion for control panels and distribution rooms. Engineers often struggle with space constraints, weather exposure, and installation complexity in harsh environments. UL Listed certification, a NEMA 3R enclosure, and indoor-outdoor suitability ensure safety, moisture resistance, and regulatory compliance across industrial facilities. The unit's 3 kVA rating supports scalable power for motor starters, relays, and control circuits, while its aluminum windings and epoxy encapsulation enhance durability. By combining a compact footprint with straightforward wiring (538D) and broad primary voltage options, this transformer delivers dependable performance and lower total cost of ownership for OEMs and end-users.
Product Information
Extended Description
S40N11S03 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 190 V, 200 V, 208 V, 220 V, 380 V, 400 V, 416 V, 440 V, 120/240 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 538D
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S40N11S03
UPC
786685267227
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
100 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
177
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
538D
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
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Encapsulated EP design reduces leakage paths and provides robust protection against dust and vibration, translating to longer service life in demanding environments. In practice this means fewer field failures and lower maintenance for control panels and machine enclosures. The NEMA 3R enclosure and indoor-outdoor rating enable installation in outdoor cabinets, wash-down areas, or damp workshops without extra enclosure retrofits. This compatibility saves time during installation and reduces total cost of ownership. Flexible primary voltage options from 190 to 440 V and a 120/240 V secondary support a range of industrial circuits, letting you standardize on one transformer across multiple sites. No taps and simple wiring with 538D streamline installation and reduce wiring errors, while the 3 kVA rating fits common control circuits. Durable aluminum coil, 115 °C rise, and UL Listed certification ensure reliability and safety, together with a 1-year warranty (or 18 months from shipment) for risk mitigation. Its compact footprint (9.89 in depth, 10.38 in width, 16 in height) and 100 lb weight simplify rack mounting and field deployment, offering engineers meaningful layout flexibility.
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FAQs
Yes. The S40N11S03 features a single-phase 3 kVA design with a NEMA 3R enclosure and indoor-outdoor capability, making it ideal for control panels, outdoor cabinets, and environments with dust, moisture, or temperature swings. UL-listed protection adds regulatory assurance while maintaining compact form for tight installations.
Primary voltages are selectable across 190, 200, 208, 220, 380, 400, 416, and 440 V, while the secondary is 120/240 V. The unit operates at 60 Hz, with a 3 kVA rating and no taps, simplifying wiring for standard control circuits and multiple site applications.
Yes. With a NEMA 3R enclosure and indoor-outdoor rating, the transformer is designed for outdoor cabinets and damp environments. The aluminum winding and encapsulated design provide resilience against humidity, moisture ingress, and temperature variations common in industrial facilities.
The S40N11S03 carries UL Listed certification, which confirms safety compliance for electrical components. Combined with the NEMA 3R enclosure and 60 Hz single-phase operation, it aligns with common codes for commercial and industrial power distribution and machine control installations.
The 3 kVA, single-phase design supports reliable panel power with minimal maintenance due to encapsulated aluminum windings and robust enclosure. The unit's compact footprint and straightforward wiring (538D) reduce installation time, while the included warranty—one year from installation or 18 months from shipment—helps manage total cost of ownership and downtime risk.