Eaton S20L11B03SS General-Purpose Transformer - UL Listed
Part Number: S20L11B03SS
Quick Summary
The Eaton S20L11B03SS general-purpose encapsulated transformer delivers reliable voltage conversion for control panels and industrial networks. This design addresses installation complexity and environmental exposure by combining a rugged enclosure with proven performance. UL Listed certification and a NEMA 3R enclosure support indoor-outdoor service, while the 3 kVA rating and 60 Hz operation meet practical machine-building needs. Built for ease of retrofits and compliant installations, it pairs smoothly with standard low voltage panels and utility-grade power systems, delivering efficiency and uptime for critical applications.
Product Information
Extended Description
S20L11B03SS Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 2 at -5% FCBN X 4 at -2.5% FCBN, 80 °C rise, 3 KVA, indoor-outdoor, 23A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11B03SS
UPC
786680076930
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
115 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
Grade 304 stainless steel enclosure
Coil material
Aluminum
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
80 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: General-purpose encapsulated design minimizes panel space and simplifies installation, reducing commissioning time and wiring errors in machine controls and panelboards. This enables faster deployment of new lines and retrofits in manufacturing environments. Feature → Aluminum coil material improves thermal performance and corrosion resistance, enhancing long-term reliability in mixed indoor-outdoor environments and reducing maintenance costs for OEMs and end users. Feature → NEMA 3R enclosure provides weather-resistant protection for outdoor installations, lowering the risk of moisture-related faults and enabling outdoor panels in industrial facilities. Feature → 3 kVA, single-phase, 60 Hz with 240/480 V primary and 120/240 V secondary meets common industrial power distribution needs, supporting off-the-shelf components and reducing voltage drop in feeder runs. Feature → Tap settings (2 at -5% FCBN x 4 at -2.5% FCBN) offer voltage regulation flexibility for variances in supply or load, improving control accuracy and protecting sensitive electronics. Feature → UL Listed and compact footprint deliver compliance and space efficiency, supporting streamlined procurement and integration with Eaton catalog products. Feature → 25-000 warranty with one year from installation or 18 months from shipment provides predictable support terms, reassuring procurement and maintenance planning. Industry context around standardization and interoperability with low-voltage controls emphasizes compatibility with existing Eaton power management ecosystems, promoting reuse and reducing total cost of ownership.
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FAQs
The S20L11B03SS supports 240 V or 480 V primary inputs and provides a 120/240 V secondary. Its NEMA 3R enclosure and UL Listed certification ensure reliable outdoor or indoor service, making it a straightforward fit for panels and controllers that operate from common industrial voltages.
Primary voltages are 240 V and 480 V, while the secondary voltage is 120/240 V. This enables convenient step-down within control circuits and aligns with standard control panel components and safety margins in industrial environments.
The unit is a 3 kVA transformer designed for 60 Hz operation. This combination supports typical industrial control and automation loads while maintaining manageable losses and heat for reliable continuous service.
It uses a NEMA 3R enclosure with an aluminum-coil wound transformer, and catalog notes indicate a Grade 304 stainless steel enclosure option for additional corrosion resistance. This configuration supports indoor-outdoor use with reliable environmental protection.
Eaton provides a warranty per policy 25-000: one year from the date of installation or eighteen months from shipment, whichever occurs first. This arrangement supports planning for replacements, maintenance, and total cost of ownership in manufacturing environments.