Eaton S20P11E10 Encapsulated Transformer - UL Listed
Part Number: S20P11E10
Quick Summary
The Eaton S20P11E10 encapsulated transformer delivers reliable power isolation and voltage conversion for general-purpose industrial control panels and machine assemblies. In practice, engineers often face bulky enclosures, weather exposure, and wiring complexity that slow deployment and raise maintenance costs. This unit is UL Listed for safety and features a NEMA 3R enclosure suitable for indoor-outdoor service, plus a 60 Hz single-phase design that aligns with common facility power systems. With 240/480 V primary and 120/240 V secondary, aluminum coil construction, and a 10 kVA rating, it offers a compact, efficient solution that reduces installation time and total cost of ownership while delivering robust performance in mixed environments.
Product Information
Extended Description
S20P11E10 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 179, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 10 KVA, indoor-outdoor, 121B
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11E10
UPC
786680074622
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
200 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
179
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
121B
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
10 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S20P11E10
Selling Policy 25-000 - Distribution and Control Products and Services
Encapsulated design with aluminum coil provides rugged reliability, enabling longer service life in harsh environments and reducing field maintenance. This translates to fewer outages and lower lifecycle costs for machine builders and panel shops. The NEMA 3R enclosure supports indoor-outdoor installation, improving weather resistance and enabling flexible siting of control gear without sacrificing protection. The transformer supports standard power systems with 240/480 V primary input and 120/240 V secondary output, simplifying integration with existing equipment and lowering refurbishment risks in legacy lines. Tap settings offer precise voltage adjustment (1 at +5% FCAN, 2 at -5% FCBN, 2 at +2.5% FCAN, 4 at -2.5% FCBN), helping to compensate for voltage drop and line loss on long feeders. Wiring compatibility via 121B and a 179 frame further streamline panel assembly and front-end wiring. A 115 °C rise rating confirms thermal robustness for continuous operation in demanding facilities.
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FAQs
For mixed-voltage panel installations, mount the S20P11E10 in a location that supports its NEMA 3R indoor-outdoor rating, ensure proximity to primary power sources (240/480 V) and secondary circuits (120/240 V), and use the 121B wiring connection as the standard interface. Plan for proper clearance for heat dissipation and accessible tap settings to facilitate voltage adjustments during commissioning.
The unit is a single-phase transformer rated at 10 kVA with a 60 Hz frequency. Primary voltages are 240 V and 480 V, secondary voltages are 120/240 V, and it features an aluminum coil with a 115 °C rise. These specs support standard industrial loads with efficient power transfer, suitable for control panels and equipment requiring reliable isolation and voltage transformation.
Yes, the transformer is designed for indoor-outdoor use with a NEMA 3R enclosure and UL safety certification. It supports up to 10 kVA loads, making it appropriate for small to medium automation panels, machine tool feeders, and conveyor drive circuits that demand stable 120/240 V secondary supplies from higher-voltage 240/480 V mains.
The S20P11E10 carries UL Listed certification, indicating compliance with recognized safety standards. The NEMA 3R enclosure further ensures weather resistance for outdoor or semi-protected installations, while the 60 Hz, single-phase design aligns with common industrial electrical systems. These certifications help streamline procurement, integration, and regulatory adherence in many manufacturing environments.
The encapsulated design and rugged enclosure reduce field maintenance and downtime, while the 10 kVA rating supports a range of loads without oversizing. Quick installation with standard 121B wiring and the option to apply voltage taps minimizes commissioning time. Together, these factors lower installation labor, spare parts, and energy losses, delivering a favorable ROI for OEMs and maintenance-focused facilities.