Eaton S20N11B05CU Transformer - CSA Certified UL Listed
Part Number: S20N11B05CU
Quick Summary
The Eaton S20N11B05CU Transformer delivers a general-purpose encapsulated transformer for 120/240 V secondary outputs in industrial control panels. Engineers often battle space constraints, environmental exposure, and compliance requirements; this unit’s compact footprint and rugged enclosure help mitigate those challenges. With CSA Certification and UL Listing, the product aligns with core regulatory expectations while supporting robust performance in both indoor and outdoor installations. The 5 kVA rating, copper windings, and 60 Hz single-phase design provide reliable power for control systems, machines, and distribution networks, reducing downtime and maintenance costs. This transformer integrates smoothly with standard panel builds and offers proven compatibility with Eaton and third-party components alike.
Product Information
Extended Description
S20N11B05CU Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, primary voltage: 240 x 480v, taps: none, secondary voltage: 120/240v, 80°c, 5 kva, copper windings, fr178, 3a, indoor-outdoor, 60 hz, nema 3r
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11B05CU
UPC
786680103902
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
115 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
CSA Certified UL Listed
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
178
Tap size
None
Type
General-purpose encapsulated transformer
Wiring connection
3A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
80 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated transformer design provides a compact, modular power conversion solution. Business Impact: Simplifies panel layouts, accelerates installation, and reduces space costs in tight control enclosures. Application: Control cabinets in manufacturing lines and process equipment where reliable 120/240 V secondary power is required. Feature: Copper windings and 80 °C rise specification improve durability and efficiency. Business Impact: Lower thermal stress, longer service life, and improved efficiency under peak loads, delivering lower energy losses. Application: High-demand control circuits and motors in commercial and light-industrial settings. Feature: Single-phase, 60 Hz operation with 5 kVA rating. Business Impact: Aligns with common industrial power architectures, enabling straightforward system integration and predictable voltage regulation. Application: PLC banks, relays, and instrumentation panels that need stable 120/240 V output. Feature: NEMA 3R enclosure with indoor-outdoor suitability (Weathershield Indoor-Outdoor). Business Impact: Enables outdoor installations or harsh environments without extra enclosures, reducing installation time and cost. Application: Outdoor switchgear, weather-protected environments, and remote control stations. Feature: CSA Certified and UL Listed with robust safety standards. Business Impact: Regulatory compliance reduces risk during audits and commissioning, supporting faster approvals. Application: Healthcare, food processing, and general industrial sectors where compliance is essential. Feature: 5 kVA rating with 240/480 V primary and 120/240 V secondary. Business Impact: Flexible power conversion for diversified loads, enabling scalable control architectures. Application: Powering multiple control circuits from common upstream supplies in panels and distribution boards.
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FAQs
When installing the Eaton S20N11B05CU, consider its weight of 115 lb and footprint of 9.89 in L x 10.38 in W x 16 in H to ensure proper support and ventilation. The unit uses a NEMA 3R enclosure suitable for indoor-outdoor use, with a 3A wiring connection. Plan for adequate clearances, mounting hardware, and compliant wiring practices to maintain reliability in harsh environments.
Yes. The transformer is specified with an indoor-outdoor NEMA 3R enclosure and is listed as Indoor-Outdoor. This, coupled with copper windings and robust construction, makes it suitable for outdoor installations and exposed spaces where weather resistance and durable performance are required, reducing the need for additional protective enclosures.
The unit is a single-phase, 60 Hz transformer with a 5 kVA rating. It features primary voltages of 240/480 V and a secondary of 120/240 V, with copper windings and a 3A wiring connection. It is designed to integrate with standard control panels and distribution networks, delivering reliable secondary power for PLCs, relays, and instrumentation.
The S20N11B05CU is CSA Certified and UL Listed, providing essential regulatory compliance for electrical equipment used in many markets. These certifications help streamline audits, support safe operation in industrial environments, and enable installation in facilities with strict safety and quality requirements.
Warranty is Eaton’s policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This protection helps mitigate unexpected maintenance costs, supports predictable budgeting, and reinforces long-term reliability for critical control applications.