Eaton S20N11E26A General-Purpose Transformer - UL Listed
Part Number: S20N11E26A
Quick Summary
Eaton S20N11E26A general-purpose encapsulated transformer powers control circuits in industrial environments. End users often face space constraints, overheating, and downtime when sourcing transformers that don’t fit compact control panels or fail under typical plant conditions. This model is UL Listed and designed with a NEMA 3R enclosure, indoor-outdoor capability, and aluminum windings for durability, plus a 0.25 kVA rating at 60 Hz. With these features, it reduces wiring complexity and improves reliability in critical low-voltage distribution. By aligning with standard 240/480 V to 120/240 V configurations, it helps optimize panel density and maintenance planning while meeting safety and efficiency goals.
Product Information
Extended Description
S20N11E26A Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 56, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 0.25 KVA, indoor-outdoor, 90A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11E26A
UPC
786680104503
Product Length/Depth
4.06 in
Product Height
8.97 in
Product Width
4.87 in
Product Weight
15 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 A
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
56
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
90A
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
0.25 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Encapsulated EP enclosure with aluminum windings reduces heat buildup and provides robust environmental protection, translating to longer service life and lower maintenance costs in harsh factory settings. This design minimizes moisture ingress and dust exposure, improving reliability for continuous operation in control panels and motor starters. NEMA 3R indoor-outdoor capability enables flexible installation across indoor and outdoor locations, reducing the need for multiple housing solutions and simplifying procurement. The 0.25 kVA rating at 60 Hz supports essential power for low-voltage control circuits without oversizing equipment, improving energy efficiency and panel space usage. Standard primary voltages of 240 V and 480 V with a 120/240 V secondary make it compatible with common industrial power architectures, enabling quick integration with existing hardware. The single-phase construction and 90A wiring connection streamline wiring density and installation time, while UL Listed certification provides compliance assurance and risk reduction for regulated environments. This combination of features addresses common objections about compatibility, footprint, and safety, backed by Eaton’s engineering support and field experience in automation applications.
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FAQs
Plan for a compact footprint with 4.06 in depth, 4.87 in width, and 8.97 in height. Mount within a NEMA 3R enclosure, ensure adequate clearance for heat dissipation, and route wiring to the 90A connection terminals. Verify compatibility with panel bus bars and ensure UL-listed components are used for safety compliance.
It features primary voltages of 240 V and 480 V and a secondary of 120/240 V, rated at 0.25 kVA, operating at 60 Hz. This aligns with many machine control circuits and low-voltage panels, delivering reliable voltage transformation while maintaining a compact, single-phase footprint.
Yes, the unit is UL Listed, indicating it meets recognized safety standards for electrical components. This simplifies procurement for regulated industries, aids in passing internal and external audits, and reduces risk when integrating the transformer into control panels and power-distribution schemes.
Yes. The NEMA 3R enclosure and indoor-outdoor (Weathershield) rating provide weather resistance, making it suitable for semi-outdoor installations or protected outdoor use. Aluminum windings and electrostatic shielding further enhance durability in challenging environments, reducing maintenance needs and downtime.
The unit carries Eaton’s one-year warranty (or 18 months from shipment, whichever occurs first) and focuses on reliability, reducing panel maintenance and unexpected downtime. Its compact size, robust enclosure, and straightforward wiring contribute to faster installation and longer intervals between service, delivering predictable TCO improvements in panel-centric automation.