Eaton S20P11E03 General-Purpose Encapsulated Transformer - UL Listed
Part Number: S20P11E03
Quick Summary
Eaton general purpose encapsulated transformer provides isolated power for control panels and industrial equipment. This unit addresses common downtime and mounting challenges by delivering compact, robust power conversion in demanding environments. It carries UL Listed certification and a NEMA 3R enclosure for indoor-outdoor use, supporting 60 Hz operation with an aluminum coil for reliability. The design accommodates wiring flexibility and easy installation, helping engineers and procurement teams meet a range of panel-building standards. In addition to standard power conversion, this transformer supports scalable automation setups, reducing wiring complexity and enabling safer, compliant control architectures.
Product Information
Extended Description
S20P11E03 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 176, 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, 3 KVA, indoor-outdoor, 121B
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11E03
UPC
786680074714
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
65 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
176
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
3 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: General purpose encapsulated design with aluminum coil reduces weight while maintaining durability, improving installer convenience and long-term reliability in crowded panels or compact electrical rooms. This translates to lower maintenance costs and faster installation in machine centers. Feature → 60 Hz single-phase operation with 240 V/480 V primary and 120/240 V secondary provides versatile compatibility across equipment, minimizing rewiring and stock needs for spare parts. Application: automation panels, machine tools, and distribution enclosures where standard low-voltage outputs are needed. Feature → 3 kVA rating and 115 °C rise enable reliable control power for multiple relays, timers, and logic circuits without excessive temperature concerns. Business impact: improved uptime and reduced risk of voltage drop in critical control circuits. Application: process lines and robotic cells demanding stable control voltage. Feature → NEMA 3R enclosure with indoor-outdoor suitability and Weathershield capability supports exterior or damp environments, delivering durable service in outdoor electrical rooms or remote facilities. Business impact: extended lifecycle and reduced enclosure swaps. Application: outdoor panels and outdoor-mounted transformers. Feature → Tap changer options (1 at +5%, 2 at -5% and 4 at -2.5%) offer precise voltage regulation, protecting sensitive electronics from minor supply variations. Application: fine-tuning to meet exact 120/240 V loads in distributed control systems. Feature → Electrostatical shielding minimizes EMI, supporting cleaner signal integrity for sensitive automation equipment. Business impact: improved sensor accuracy and reduced electrical noise in sophisticated automation networks. Application: PLC inputs, A/D converters, and instrumentation panels. Feature → UL Listed certification and a robust 176 frame with 65 lb weight ensure compatibility with standard industrial procurement and mounting practices. Application: retrofit projects or new builds requiring standard-specification components. Feature → Warranty of one year (installation-based) or eighteen months from shipment protects against early faults, reducing total cost of ownership. Application: maintenance planning and service contracts in plant environments.
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FAQs
Plan for the 176 frame footprint and a weight of 65 lb, with dimensions 8 in depth, 14.25 in height, and 7.69 in width. The unit uses a 121B wiring connection and is UL Listed, with a NEMA 3R enclosure suitable for indoor-outdoor installations. Ensure clearance for ventilation and secure mounting to minimize vibration in industrial environments.
The transformer is rated at 3 kVA, operates at 60 Hz single-phase, with primary voltages of 240 V or 480 V and a secondary of 120/240 V. It features a 115 °C rise, aluminum coil, and framework 176. These specs support reliable control power in standard automation panels and machine tools.
Yes. It comes in an indoor-outdoor Weathershield with a NEMA 3R enclosure, enabling reliable operation in outdoor enclosures and damp environments. This makes it a practical choice for remote panels and facilities exposed to weather or humidity, while maintaining safety and performance.
The S20P11E03 is UL Listed, ensuring compliance with widely adopted electrical safety standards for industrial components. The enclosure and design support reliable performance in demanding environments, and the 121B wiring and 176 frame provide compatibility with standard industrial control systems and installation practices.
With a 3 kVA rating, robust aluminum windings, and a durable NEMA 3R envelope, the unit delivers reliable power with low maintenance needs. The one-year warranty (or 18 months from shipment) provides protection against early faults, reducing downtime costs in automation and process control applications.