Eaton S20N11B05CULS42 Transformer - UL Listed
Part Number: S20N11B05CULS42
Quick Summary
Eaton general purpose encapsulated transformer provides compact, reliable power for control panels. Engineers often wrestle with heat, noise, and enclosure compatibility in tight electrical spaces. UL Listed and CSA Certified, with a NEMA 3R indoor-outdoor enclosure and 60 Hz operation, simplify compliance and field acceptance. Featuring a 5 kVA single-phase rating and copper windings, it efficiently converts 240/480 V to 120/240 V loads while minimizing heat. Designed for ease of installation in existing cabinets, this transformer supports dependable operation across industrial environments and long service life, delivering value in everyday automation and electrical distribution tasks.
Product Information
Extended Description
S20N11B05CULS42 Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, primary voltage: 240 x 480v, taps: none, secondary voltage: 120/240v, 80°c, 5 kva, copper windings, fr178, 3a, indoor-outdoor, 60 hz, nema 3r.
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11B05CULS42
UPC
786680103889
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
125 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 CSA Certified
Catalog Notes
Low sound design equivalent to 42 dB
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
178
Tap size
None
Type
General-purpose encapsulated transformer
Wiring connection
3A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
80 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Feature: Copper windings and EP design for low losses and robust durability → Business impact: Improves efficiency and thermal performance, reducing energy waste and maintenance needs → Application: Control panels and switchgear in harsh or space-constrained environments. Feature: Primary 240/480 V and secondary 120/240 V, 60 Hz single-phase configuration → Business impact: Versatile compatibility with common plant circuits and equipment → Application: Powering PLCs, relays, and instrumentation in automation cabinets. Feature: 5 kVA, 80 °C rise rating → Business impact: Sufficient headroom for transient loads while maintaining compact form factor → Application: Medium-load applications in manufacturing lines and processing equipment. Feature: NEMA 3R enclosure suitability (Indoor-Outdoor) → Business impact: Outdoor-ready installation eliminates additional housings and enclosure upgrades → Application: Outdoor control panels, production lines, and prefabricated assemblies. Feature: Low sound design (Catalog notes: low sound ~42 dB) → Business impact: Quiet operation in occupied facilities and shared spaces → Application: Assembly lines near offices or service bays. Feature: Certifications and warranty (UL Listed, CSA Certified; 1-year standard / 18 months from shipment) → Business impact: Reduced risk and faster compliance qualification → Application: Procurement and maintenance planning for regulated environments.
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FAQs
The S20N11B05CULS42 is designed for straightforward installation in typical control panels. Its dimensions (9.89 in depth, 16 in height, 10.38 in width) and weight (125 lb) fit well within standard panels and mounting arrangements. Ensure adequate clearance for airflow and connect primary 240/480 V lines and secondary 120/240 V loads using appropriate conductors and terminations (noting copper windings). The indoor-outdoor rating supports either indoor or protected outdoor placements when mounted per enclosure guidelines.
Verify a 5 kVA rating with single-phase operation, primary voltage of 240/480 V, and secondary voltage of 120/240 V. Confirm 60 Hz frequency, 80 °C rise rating, and copper windings for efficiency and durability. Wiring connection is 3A, and the transformer supports indoor-outdoor mounting within a NEMA 3R enclosure, ensuring reliable operation under normal industrial loads.
Yes. The enclosure is NEMA 3R and listed as Indoor-Outdoor, which makes it appropriate for outdoor installations in compliant environments. Its 60 Hz single-phase 5 kVA configuration supports typical plant feeders and panel-mounted power supplies, reducing the need for additional weatherproof housings and simplifying installation in exposed areas.
The S20N11B05CULS42 carries UL Listed and CSA Certified markings, signaling adherence to safety and performance standards for electrical equipment. This helps streamline code compliance reviews, procurement approvals, and reliability assessments across industrial facilities.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This combination reduces risk for maintenance budgets and supports long-term uptime. With copper windings and a durable epoxy encapsulation, the unit is engineered for extended service life, lowering replacement and energy-related costs.