Eaton S20K11S07CU Transformer - 7.5 kVA, UL Listed
Part Number: S20K11S07CU
Quick Summary
S20K11S07CU is a general-purpose encapsulated transformer designed for control panels and distributed power in industrial environments. When space is tight and uptime matters, bulky, open-frame solutions slow installation and raise maintenance costs. This unit carries UL Listed certification and uses a NEMA 3R enclosure suited for indoor-outdoor service. With 7.5 kVA capacity, 60 Hz single-phase operation, and dual primary voltages, it supports flexible wiring and quick integration into modern power management systems.
Product Information
Extended Description
S20K11S07CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 178, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at -10% FCBN X 2 at -5% FCBN, 115 °C rise, 7.5 KVA, indoor-outdoor, 9A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20K11S07CU
UPC
786680032981
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
138 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
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
178
Tap size
1 at -10% FCBN x 2 at -5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
9A
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
7.5 kVA
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated transformer with copper windings and EP design. Business Impact: Improves efficiency, thermal performance and voltage stability under load. Application: Ideal for control cabinets, outdoor equipment, and manufacturing lines where rugged reliability matters. Feature: Tap size options 1 at -10% FCBN and 2 at -5% FCBN. Business Impact: Enables precise voltage compensation to reduce secondary voltage drift and equipment stress. Application: Sites with fluctuating feeders or long supply runs seek consistent performance. Feature: 240/480 V primary and 120/240 V secondary. Business Impact: Flexible integration across multi-voltage systems, simplifying panel design and stock. Application: Powering mixed-load controls, lighting, and small motors in industrial environments. Feature: 7.5 kVA rating at 60 Hz, single-phase. Business Impact: Delivers adequate distribution capacity without oversizing, improving energy management and cost efficiency. Application: Control power for machines, conveyors, and automation subsystems. Feature: NEMA 3R enclosure and copper windings. Business Impact: Weather-resistant, reliable operation in indoor-outdoor settings with long-term performance. Application: Outdoor shelters and damp environments where protection matters. Feature: Compact footprint (9.89 in L, 10.38 in W, 16 in H) and 138 lb weight. Business Impact: Easier installation, mounting versatility, and reduced cabinet footprint. Application: Retrofit projects and new builds with limited space for power distribution components.
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FAQs
The S20K11S07CU is intended for control panels and distributed power in industrial environments. It provides stable 120/240 V secondary output from 240/480 V primary at 60 Hz, making it suitable for machine controls, small motors, and panel power conditioning. Its NEMA 3R enclosure supports indoor-outdoor installation, while copper windings ensure efficiency and thermal performance under load.
Key specs include 7.5 kVA VA rating, 60 Hz frequency, single-phase, primary voltages of 240 V and 480 V, secondary voltages of 120/240 V, and a 115 °C rise. Voltage taps are 1 at -10% FCBN and 2 at -5% FCBN to accommodate input variations. Enclosure is NEMA 3R and the unit is UL Listed for safety and reliability.
Yes. The transformer is UL Listed and features a NEMA 3R enclosure designed for indoor-outdoor service. This combination provides reliable protection against dust, moisture, and incidental weather exposure, enabling installation in control rooms, outdoor shelters, and other harsh environments without additional protective enclosures.
The unit offers taps at 1 at -10% FCBN and 2 at -5% FCBN. These allow minor voltage adjustments at the primary to compensate for supply fluctuations, helping maintain a stable secondary voltage and protecting sensitive loads from over- or under-voltage conditions. Use them when site voltage levels drift beyond standard tolerances or when feeder losses are noticeable.
With a compact footprint (9.89 in x 10.38 in x 16 in), weight of 138 lb, and a 178 frame, the S20K11S07CU fits many control panel layouts and outdoor shelters. It supports dual primary voltages (240/480 V) and secondary (120/240 V), facilitating flexible panel design and quick integration into existing power management and distribution schemes.