Eaton S20K11E05 Encapsulated Transformer - UL Listed
Part Number: S20K11E05
Quick Summary
Eaton S20K11E05 general purpose encapsulated transformer provides reliable power isolation and voltage conversion for industrial control panels. In modern plants, space constraints, routine maintenance, and exposure to dust and moisture can undermine uptime. UL Listed certification, a rugged NEMA 3R enclosure, and 60 Hz operation deliver regulatory compliance and long-term reliability in indoor-outdoor environments. Its 5 kVA rating with 240/480 V primary and 120/240 V secondary voltages supports scalable automation while reducing spare-part inventories. This combination helps engineers speed installation, simplify procurement, and improve reliability across packaging lines, robotics, and automated machinery.
Product Information
Extended Description
S20K11E05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 60 Hz, single-phase, 240V X 480V, 120/240 V, Shielded, 1 at -10% X 2 at -5%, 115 °C rise, 5 KVA, indoor-outdoor,
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20K11E05
UPC
786680234934
Product Length/Depth
10.38 in
Product Height
12.82 in
Product Width
9.89 in
Product Weight
105 lb
Compliances
Not Applicable
Certifications
UL Listed
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
177
Insulation
180 °C
Mounting
Wall Mount
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
5 kVA
kVA
5 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
5 kVA
Special features
Shielded
Weathershield
Indoor-Outdoor
Feature: 5 kVA rating on a single-phase, 60 Hz transformer with dual primary voltages of 240 V and 480 V and dual secondary voltages of 120/240 V. Business Impact: Enables fewer transformers in mixed-voltage panels and reduces stocking complexity, improving inventory turns. Application: Ideal for control panels in machine builders and automation cabinets. Feature: Indoor-outdoor NEMA 3R enclosure with shielded aluminum windings. Business Impact: Provides weather resilience and field durability, allowing outdoor or harsh-location installations without compromising safety or performance. Application: Outdoor-rated enclosures for plant exterior equipment or exposed factory corners. Feature: Insulation rated to 180 °C with a 115 °C rise. Business Impact: Improves thermal tolerance and service life in warm industrial environments, reducing derating and unexpected outages. Application: Continuous-duty control circuits in manufacturing environments. Feature: Tap sizing of 1 at -10% FCBN and 2 at -5% FCBN. Business Impact: Maintains voltage regulation under load changes, preserving control voltage quality and equipment performance. Application: Critical automation circuits requiring stable 120/240 V control voltages. Feature: Wall-mount design with UL Listed and shielded construction. Business Impact: Speeds retrofit projects, simplifies installation, and supports regulatory compliance and safety. Application: Panel upgrades in existing systems and new machine-builds requiring compact, compliant transformers.
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FAQs
The S20K11E05 is a single-phase 5 kVA transformer with primary voltages of 240 V and 480 V and secondary voltages of 120/240 V. It is designed for wall-mount installation in control panels and automation cabinets, with a NEMA 3R enclosure suitable for indoor-outdoor use.
Key specifications include 60 Hz operation, 5 kVA rating, 240/480 V primary, 120/240 V secondary, 21A wiring connection, and a 115 °C temperature rise with 180 °C insulation. Voltage regulation is aided by taps: 1 at -10% FCBN and 2 at -5% FCBN to maintain stable output under load changes.
Yes. The S20K11E05 uses a NEMA 3R enclosure and shielded aluminum windings, delivering indoor-outdoor resilience. With UL Listed certification, it meets common regulatory and safety requirements for outdoor-rated control panels and exposed installations in industrial settings.
The transformer is UL Listed, designed for 60 Hz operation, and features a rugged NEMA 3R enclosure. Shielded windings and the wall-mount design support compliant and safe integration into industrial automation systems and power-distribution layouts.
A single 5 kVA unit can replace multiple lower-capacity transformers in mixed-voltage panels, reducing inventory, minimizing parts sourcing, and simplifying maintenance. Aluminum windings improve durability, while the compact, wall-mounted form-factor accelerates installation in space-constrained facilities.