Eaton S20K11E07 General-Purpose Encapsulated Transformer - UL Listed
Part Number: S20K11E07
Quick Summary
Eaton S20K11E07 General-Purpose Encapsulated Transformer is designed to reliably step down power from 240/480 V to 120/240 V for control panels and automation equipment. In practice, engineers face space constraints, weather exposure, and mounting challenges in compact or outdoor-rated installations. UL Listed safety certification, a NEMA 3R enclosure, and electrostatically shielded construction provide code compliance and long service life in indoor-outdoor environments. By combining a 7.5 kVA rating with 60 Hz operation and aluminum windings, this transformer delivers efficient, dependable power with reduced maintenance costs for industrial power distribution tasks and OEM panel builds.
Product Information
Extended Description
S20K11E07 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, 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, 21A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20K11E07
UPC
786680062940
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
136 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
Aluminum
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
21A
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
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: General-purpose encapsulated design provides robust, maintenance-friendly power conversion for single-phase systems, enabling reliable 7.5 kVA service in compact footprints and reducing field service calls for unexpected outages in automation panels. Application: control panels, machine IO racks, and switchgear assemblies in manufacturing lines benefit from predictable voltage regulation and simplified installation. Feature → Business Impact → Application: NEMA 3R enclosure supports indoor-outdoor installation, delivering weather resistance and code compliance while minimizing enclosure-related corrosion or water ingress risks. Application: outdoor equipment pads, entry enclosures, and process skids in harsh industrial environments. Feature → Business Impact → Application: Aluminum coil construction lowers weight and material cost relative to copper, improving handling, installation time, and total cost of ownership. Application: OEM panel builders and retrofit projects where lighter weight and rapid mounting save labor costs. Feature → Business Impact → Application: Voltage tap changes (1 at -10% FCBN x 2 at -5% FCBN) provide voltage flexibility to accommodate supply variations, improving regulator performance and protecting downstream equipment. Application: facilities with marginal or fluctuating supply voltages or mission-critical loads. Feature → Business Impact → Application: 60 Hz single-phase operation with 240/480 V primary and 120/240 V secondary ensures standard compatibility with US-based industrial power systems, easing integration with PLCs, drives, and sensors. Application: automation, packaging lines, and process control where consistent control power is essential. Feature → Business Impact → Application: Electrostatical shielding enhances EMI/RFI performance, reducing interference and protecting sensitive electronics. Application: servo drives, HMI interfaces, and digital controllers in motor-control centers and panel assemblies.
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FAQs
For compatibility, plan a single-phase 7.5 kVA transformer with a 240/480 V primary and 120/240 V secondary. Tap options are 1 at -10% and 2 at -5% FCBN to accommodate voltage variations. Mounting should align with the 178 frame, with a footprint near 9.89 in L x 10.38 in W x 16 in H and a weight of 136 lb. Use a NEMA 3R, indoor-outdoor rated enclosure and ensure UL Listed compliance in your panel design.
Key ratings include 7.5 kVA VA rating, 60 Hz frequency, single-phase configuration, primary voltages of 240 V and 480 V, secondary voltages of 120/240 V, and a 115 °C rise temperature. The enclosure supports indoor-outdoor use (NEMA 3R) and the coil is aluminum, contributing to dependable performance in demanding environments.
This transformer excels in control panels, automation equipment, switchgear, and motor-control centers where reliable step-down power is needed. Its 7.5 kVA rating suits moderate-load scenarios, while the indoor-outdoor capability makes it suitable for both plant rooms and exterior enclosures, reducing the need for separate weatherproof enclosures.
The S20K11E07 carries UL Listed certification for safety compliance. It features a NEMA 3R enclosure suitable for indoor-outdoor installation, and its electrostatically shielded design supports EMI/RFI performance, helping meet common industry standards for electrical safety and interference mitigation.
The aluminum windings and robust epoxy-free construction reduce weight and simplify handling, lowering installation time and labor costs. The electrostatic shielding and NEMA 3R rating minimize service interruptions from EMI and weather exposure, improving uptime and lifecycle cost. A standard one-year warranty from installation or 18 months from shipment adds predictable support.