Eaton S20K11E03 General purpose encapsulated transformer - UL Listed
Part Number: S20K11E03
Quick Summary
Eaton S20K11E03 is a general purpose encapsulated transformer for reliable power distribution in control panels and industrial equipment. Engineers often confront environments that demand rugged protection, compact footprint, and consistent voltage under varying loads. This model meets UL Listed certification, is DOE2016 Efficient, and features a NEMA 3R enclosure suitable for indoor-outdoor duty, helping ensure compliance and lower energy waste. Its 3 kVA rating with dual primary voltages and aluminum winding provides installation flexibility, while delivering stable output and reduced operating costs for long-term plant reliability.
Product Information
Extended Description
S20K11E03 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 176, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at -10% FCBN X 2 at -5% FCBN, 115 °C rise, 3 KVA, Shielded, indoor-outdoor, 21A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20K11E03
UPC
786680233036
Product Length/Depth
8 in
Product Height
11.06 in
Product Width
7.69 in
Product Weight
63 lb
Compliances
DOE2016 Efficient
Certifications
UL Listed
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
176
Tap size
1 at -10% FCBN x 2 at -5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
21A
Frequency rating
60 Hz
Kva Rating
3 kVA
kVA
3 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Sound Level
NEMA ST-20
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: The S20K11E03 delivers a 3 kVA, single-phase, 60 Hz performance that supports reliable power for control circuits, automation modules, and small motor loads, enabling predictable operation and reduced downtime in panel assemblies. This translates to measurable efficiency gains and lower heat generation, improving overall equipment effectiveness (OEE) for manufacturing lines. Application: Control panels, machine builds, automation skids.Feature → Business Impact → Application: Dual primary voltages of 240 V and 480 V offer installation flexibility across different plant power architectures, simplifying retrofits and enabling rapid enclosure integration without rewiring. This reduces installation time and risk during upgrades or expansions. Application: Plant-wide power distribution and retrofit projects.Feature → Business Impact → Application: NEMA 3R enclosure and indoor-outdoor capability protect the transformer in challenging environments, reducing maintenance intervals and protecting critical loads from weather-related issues. Application: Outdoor switchgear, equipment rooms, and harsh production floors.Feature → Business Impact → Application: Aluminum coil and electrostatic shielding improve thermal performance and EMI suppression, supporting sensitive electronics and improving signal integrity in control circuits. Application: Motor starters, PLC inputs, and instrumentation panels.Feature → Business Impact → Application: DOE2016 Efficient rating and UL Listed certification provide regulatory compliance and energy savings, lowering total cost of ownership. Application: Energy-conscious facilities, regulated industries, and projects aiming for green building credits.Feature → Business Impact → Application: Tap changer options (1 at -10% FCBN x 2 at -5% FCBN) enable voltage regulation under load, ensuring stable secondary voltages for critical loads and reducing nuisance tripping. Application: Systems with fluctuating input voltage or sensitive automation circuits.
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FAQs
Yes. The S20K11E03 is designed for single-phase operation with primary voltages of 240 V or 480 V and secondary outputs of 120 V and 240 V. It supports 60 Hz systems and uses a compact 176 frame with an 8 in length, 7.69 in width, and 11.06 in height footprint. This makes it straightforward to integrate into existing control panels or new equipment skids without extensive rewiring.
The unit carries the DOE2016 Efficient designation and UL Listed certification, indicating energy-conscious performance and regulatory compliance. It has a 115 °C rise and an electrostatically shielded windings design to help minimize EMI. These features translate to improved thermal management, stable outputs under load, and better protection for nearby electronics in industrial environments.
Ideal for factory automation, packaging lines, and control panels in manufacturing environments, the S20K11E03 handles lighting, PLC power, and small-motor control loads. Its indoor-outdoor rating and rugged NEMA 3R enclosure make it suitable for outdoor equipment rooms or damp production areas, while its dual primary voltages support mixed-power installations common in large plants.
UL Listed certification confirms safety and reliability for industrial equipment, while the DOE2016 Efficient rating demonstrates energy efficiency. Together, these certifications support regulatory compliance, safer operation, and potential energy-benchmarking in audits or green-building programs. The NEMA 3R enclosure further ensures suitability for harsh environments without additional protection.
Maintenance is minimized by a robust encapsulated design with an aluminum coil and shielded windings, reducing corrosion risks and EMI-related issues. The 3 kVA rating aligns with modest-load control panels, delivering energy efficiency and reduced heat losses. Over time, this translates to lower energy costs, fewer field failures, and a faster payback in automation upgrade projects.