Eaton S20L11S05CULS42 General-Purpose Encapsulated Transformer - UL Listed
Part Number: S20L11S05CULS42
Quick Summary
Eaton S20L11S05CULS42 general-purpose encapsulated transformer powers control panels and industrial equipment with dependable voltage conversion. Many engineers face mismatched voltages and tight spaces, making installation and maintenance a headache. CSA Certified and UL Listed certifications provide safety and regulatory confidence, while the NEMA 3R enclosure supports reliable indoor-outdoor operation. With a 5 kVA rating, 60 Hz single-phase design and copper windings, this transformer delivers efficient, steady power for critical loads in demanding environments. The combination of rugged construction and flexible primary/secondary voltages helps streamline procurement and installation, delivering tangible business value through reduced downtime and improved system reliability. It also aligns well with control-system modernization projects and distributed-power strategies.
Product Information
Extended Description
S20L11S05CULS42 Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 2 at-5% FCBN x 4 at -2.5% FCBN, 115 °C rise, 5 KVA, indoor-outdoor, 23A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11S05CULS42
UPC
786680103926
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
117 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
CSA Certified UL Listed
Catalog Notes
Low sound design equivalent to 42 dB
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
177
Tap size
2 at -5% FCBN x 4 at -2.5% FCBN
Type
General-purpose encapsulated transformer
Wiring connection
23A
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
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S20L11S05CULS42
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: EP encapsulated construction with copper windings delivers high efficiency and rugged protection in a compact form. Business impact: lower copper losses, improved heat management, and longer service life translate to energy savings and reduced maintenance costs. Application: ideal for space-limited control panels and outdoor equipment where durability matters. Feature: Dual primary voltages of 240 V and 480 V with taps at -5% FCBN and -2.5% FCBN. Business impact: flexible input matching reduces the need for additional converters and simplifies stocking. Application: suitable for facilities with variable power conditions, including retrofit projects. Feature: NEMA 3R indoor-outdoor enclosure with a low sound design (~42 dB). Business impact: weather resistance and quiet operation improve reliability and worker comfort. Application: outdoor substations, equipment rooms, and distributed-control installations. Feature: 5 kVA rating at 60 Hz in a single-phase configuration with copper windings. Business impact: stable voltage supply for mid-range automation loads, reducing downtime and voltage fluctuations. Application: power distribution in factory floors, control panels, and machine feed circuits. Feature: CSA Certified and UL Listed with a one-year warranty (plus 18 months from shipment). Business impact: compliance assurance and supplier support for procurement policies. Application: regulated facilities and projects demanding formal certification and dependable post-sale service.
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FAQs
The S20L11S05CULS42 is a 60 Hz, single-phase transformer rated for 5 kVA with dual primary voltages of 240 V and 480 V and a 120/240 V secondary. It uses copper windings and offers taps at -5% FCBN and -2.5% FCBN, simplifying voltage matching in mixed-voltage facilities and retrofit projects while maintaining regulation under load.
Designed for indoor-outdoor environments, the transformer features a NEMA 3R enclosure, weather resistance, and a low noise profile (~42 dB). Plan for outdoor mounting with appropriate clearance, secure wiring connections, and ventilation where necessary to maintain performance and comply with site noise and safety policies.
This Eaton transformer carries CSA Certified and UL Listed marks, providing recognized safety and performance compliance for industrial controls. These certifications support procurement requirements, especially in regulated facilities, and align with typical supplier qualification processes for electrical distribution equipment.
Ideal for control panels, power distribution blocks, and outdoor equipment feeds, the 5 kVA transformer supports mid-range automation loads. Its 240/480 V to 120/240 V conversion, rugged EP encapsulation, and weather-resistant enclosure make it suitable for manufacturing lines, substations near equipment, and retrofit projects.
Expect low maintenance due to a robust encapsulated design and copper windings that improve efficiency and reduce overheating. The CSA UL certifications and Eaton warranty provide risk mitigation for procurement, while improved reliability and reduced downtime contribute to faster return on investment in ongoing production environments.