Eaton S20N11E01A Transformer - UL Listed
Part Number: S20N11E01A
Quick Summary
Eaton S20N11E01A transformer provides reliable power isolation and voltage conversion for industrial controls. Installing transformers can be challenging due to space constraints, weather exposure, and wiring complexity, especially in retrofit projects. UL Listed protection paired with a NEMA 3R enclosure supports rugged indoor-outdoor use in harsh environments, while a 60 Hz single‑phase design aligns with common automation systems. With a 1 kVA rating and primary 240/480 V to secondary 120/240 V, this unit delivers a compact, cost-effective solution for panel builders, OEMs, and maintenance teams aiming to reduce downtime and simplify installations.
Product Information
Extended Description
S20N11E01A Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 59A, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 1 KVA, indoor-outdoor, 90A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11E01A
UPC
786680104565
Product Length/Depth
5.75 in
Product Height
11.28 in
Product Width
5.99 in
Product Weight
26 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
Catalog Notes
Model A
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
59A
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
90A
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
1 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S20N11E01A
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: General-purpose encapsulated transformer design. Impact: Provides a robust, ready-to-wire power conversion solution, reducing on-site assembly time and cabling complexity. Application: Ideal for machine control panels and small automation enclosures. Feature: NEMA 3R enclosure. Impact: Enables reliable indoor-outdoor operation with weather resistance, minimizing weather-related maintenance. Application: Outdoor equipment rooms and exterior control cabinets. Feature: Aluminum coil with electrostatically shielded construction. Impact: Improves durability and EMI performance, protecting sensitive control electronics. Application: Fault-tolerant automation panels in harsh factories. Feature: 1 kVA rating at 60 Hz, single-phase. Impact: Supports standard control loads while maintaining energy efficiency and compact footprint. Application: PLC inputs, relays, and small motor-start circuits. Feature: Fixed primary 240/480 V and secondary 120/240 V. Impact: Simplifies wiring and reduces configuration errors, accelerating panel installation. Application: New builds and retrofits in automation lines. Feature: Compact footprint and 26 lb weight (5.75 in depth, 11.28 in height, 5.99 in width). Impact: Easier mounting in tight spaces and portable commissioning. Application: OEM equipment and field service upgrades.
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FAQs
Installation steps start with verifying the panel’s rated input and output voltages (240/480 V to 120/240 V) and ensuring a secure mounting in a space-adequate enclosure. Connect primary leads to the 240/480 V supply and secondary terminals to the control circuit, following Eaton’s wiring diagram. Use proper torque on terminals, observe clearances, and confirm UL Listed compliance. The unit’s NEMA 3R enclosure supports indoor-outdoor environments, reducing weather-related installation considerations. Always de-energize the system before wiring and test at no-load conditions after wiring.
This transformer features a dual primary voltage option of 240 V and 480 V, paired with a dual secondary output of 120 V and 240 V. These ratings suit typical control circuits in industrial automation, enabling direct powering of control gear from common commercial power supplies. The 60 Hz frequency aligns with standard North American systems, ensuring predictable performance and compatibility with most PLCs and relays.
Yes. The unit uses a NEMA 3R enclosure designed for indoor-outdoor service, providing weather resistance and protection against dust and moisture. Its rugged construction, aluminum coil and electrostatically shielded design contribute to reliable operation in harsher environments, reducing the need for frequent maintenance and enclosure downtimes in outdoor installations.
The S20N11E01A is UL Listed, confirming compliance with recognized safety standards for electrical equipment. The UL Listing, combined with the NEMA 3R enclosure designation, supports regulatory acceptance for industrial installations and helps streamline procurement and compliance audits for panels and control cabinets.
Maintenance considerations center on ensuring clean connections, verifying insulation integrity, and periodic load validation within the 1 kVA rating. The transformer’s robust enclosure and shielded coil reduce EMI and weather-related wear, contributing to longer intervals between service. ROI benefits include reduced field wiring errors, quicker installations, lower replacement costs due to durable construction, and improved uptime for automated lines.