Eaton S20L11B25CU Transformer - 80C rise
Part Number: S20L11B25CU
Quick Summary
Eaton general purpose encapsulated transformer powers single‑phase control panels and industrial machinery. In tight spaces and hot facilities, uptime hinges on reliable power conversion and minimal maintenance. Certification details are provided by Eaton; confirm CE and regional safety approvals, plus applicable IP enclosure ratings. With copper windings and encapsulated construction, it delivers consistent voltage transformation with lower thermal stress, supporting efficient automation. This model supports 25 kVA capacity at 1 phase, with primary 240/480 V and secondary 120/240 V, making it a versatile fit for control panels and distribution gear. By choosing encapsulation, engineers reduce dust ingress and moisture exposure while streamlining service intervals and spare-part inventories.
Product Information
Extended Description
S20L11B25CU Eaton: Eaton, general purpose encapsulated transformer, 25 kva, encaps, xfmr, 1ph, 240 x 480-120/240 80c rise, copper
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11B25CU
UPC
786680141690
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.001 lb
Certifications
Contact Manufacturer
Type
Encapsulated transformer
The S20L11B25CU delivers 25 kVA in a single‑phase encapsulated package, providing robust control-panel power with a compact footprint. This translates to predictable voltage regulation under load and reduced space requirements in highly integrated enclosures. In automation and machine control, that means easier installation and more usable panel real estate. Encapsulated construction protects windings from dust, moisture, and vibration, extending life in harsh factory floors. The tight encapsulation reduces field-maintenance needs and improves safety by limiting exposed conductors. The transformer supports primary 240/480 V and secondary outputs of 120/240 V, enabling direct compatibility with common control circuits and simplifying wiring harness design. This flexibility reduces the need for additional step-down hardware. An 80C rise rating provides reliable performance in warm environments and supports higher ambient design margins, reducing derating. Copper windings improve efficiency and thermal performance, lowering I2R losses over time. Encapsulation also supports safe installation in standard enclosures and aligns with Eaton's cataloging for easy replacement.
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FAQs
For best results mount it in a clean, ventilated enclosure with adequate clearance for servicing. Maintain even ambient conditions to respect the 80C rise rating, and route primary and secondary wiring to minimize interference. Use manufacturer-referenced torque values from the Eaton specification sheet to ensure secure terminations.
Yes, the S20L11B25CU is rated for 25 kVA in a single‑phase configuration. Copper windings and efficient core design reduce I2R losses, contributing to lower operating temperatures and improved energy efficiency over the transformer’s life, especially under typical automation loads.
The unit provides primary connections for 240/480 V and secondary outputs of 120/240 V, enabling direct compatibility with common control circuits and North American or international panels. Wire harnesses can be simplified with Eaton’s catalog data and datasheets.
Current data lists Certifications as Contact Manufacturer, so verify with Eaton for your region. In many markets, CE marking, safety approvals, and protection ratings (IP) are important; request the latest Eaton specification sheet to confirm the exact certifications for your installation.
Encapsulation protects windings and reduces dust/moisture ingress, lowering maintenance cycles and field repair costs. The 25 kVA rating and copper windings offer reliable performance in automation lines, contributing to higher uptime, less spare-part inventory, and a favorable total cost of ownership.