Eaton S20K11S05N Encapsulated Transformer - UL Listed
Part Number: S20K11S05N
Quick Summary
The Eaton S20K11S05N encapsulated transformer delivers reliable 5 kVA power conversion for industrial control panels. Tight footprints and exposure to dust, moisture, or temperature swings are common pain points in these environments. UL Listed safety certification with a NEMA 3R enclosure supports rugged outdoor-indoor service, while aluminum coil design improves heat dissipation. For panel builders and integrators, this transformer aligns with low-voltage distribution schemes and simplifies maintenance through clear termination options and a compact form factor. This translates to faster project timelines and reduced field rework by ensuring predictable performance across loads. Designed for reliability in manufacturing and processing environments, it supports scalable power distribution as systems grow.
Product Information
Extended Description
S20K11S05N Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at -10% FCBN X 2 at -5% FCBN, 115 °C rise, 5 KVA, indoor-outdoor, 9A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20K11S05N
UPC
786680102288
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
105 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
1 at -10% FCBN x 2 at -5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
9A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
5 kVA, single-phase, 60 Hz operation provides efficient voltage transformation for control panels and distribution blocks. The primary side accepts 240 V or 480 V, with a secondary of 120/240 V, enabling versatile integration across standard low-voltage networks. Aluminum coil construction enhances heat dissipation and reduces weight, contributing to cooler operation and longer site service intervals. The 115 °C rise rating supports peak loading during short-term surges without compromising safety or longevity. An epoxy-encapsulated design paired with a NEMA 3R enclosure delivers rugged, weather-resistant performance suitable for indoor-outdoor use, minimizing field maintenance and ensuring continuity in harsh environments. Tap settings—1 at -10% FCBN and 2 at -5% FCBN—allow precise voltage compensation along feeders, reducing voltage drop and improving downstream equipment performance. Compact dimensions (9.89 in L × 10.38 in W × 16 in H) and a 105 lb weight simplify installation in crowded electrical rooms or on equipment racks, while a secure 9A wiring connection supports reliable terminations. The unit ships with UL Listed safety certification and Eaton’s warranty policy, ensuring compliant, supported operation. Compatibility with Eaton catalogs and EP design philosophy helps maintain consistency across power distribution projects, and its general-purpose nature makes it a versatile choice for machine builders, panel shops, and industrial facilities seeking a dependable 5 kVA transformer for evolving power needs.
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FAQs
For reliable installation, position the unit to maximize airflow around the enclosure, mount in a location protected from direct water exposure, and ensure adequate clearance for access to terminations. The NEMA 3R-rated enclosure supports indoor-outdoor mounting, and the 9A wiring connection provides secure torque-appropriate terminations. Consider space for the 9.89 in length, 10.38 in width, and 16 in height footprint and provide a stable mechanical mounting surface.
The transformer is a 5 kVA, single-phase device operating at 60 Hz. It has a primary voltage of 240 V or 480 V and a secondary voltage of 120/240 V. It uses an aluminum coil and supports a 115 °C rise, making it suitable for moderate thermal loads while maintaining efficiency in typical panel and distribution applications.
Yes. The unit features an indoor-outdoor, NEMA 3R-rated enclosure designed to withstand weather and environmental exposure. This makes it suitable for outdoor equipment pads or protected areas adjacent to production lines, while still delivering stable, code-compliant voltage transformation for downstream equipment.
The S20K11S05N carries UL Listed safety certification, confirming compliance with recognized safety standards for electrical equipment. The enclosure rating (NEMA 3R) supports weather resistance for indoor-outdoor service, and the unit is designed to meet common industrial power distribution requirements commonly referenced in control panel and machine-building projects.
Eaton provides a warranty under policy 25-000, spanning one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This coverage helps protect against manufacturing defects and supports maintenance planning, with access to Eaton’s technical support for installation and compatibility questions.