Eaton S20N11P51P General-Purpose Transformer - UL Listed
Part Number: S20N11P51P
Quick Summary
Eaton S20N11P51P general-purpose encapsulated transformer provides a compact, reliable power source for industrial control panels. Engineers face space constraints, outdoor installation demands, and the need to stay compliant with safety standards. UL Listed certification with a NEMA 3R enclosure supports rugged, indoor-outdoor service, while the aluminum coil enhances efficiency. Designed for 0.5 kVA, 60 Hz operation with 240/480 V primary and 120/240 V secondary, it streamlines panel design and maintenance. This combination delivers dependable low-voltage power to controls, reducing wiring complexity and downtime, while the 57P frame fits compact layouts. For projects requiring modular expansion, its consistent performance supports scalable automation deployments.
Product Information
Extended Description
S20N11P51P Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 57P, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 0.5 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11P51P
UPC
786680073731
Product Length/Depth
5.18 in
Product Height
9.34 in
Product Width
4.45 in
Product Weight
14 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
57P
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
115 °C rise
Volt ampere rating
0.5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S20N11P51P
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Aluminum coil and encapsulated EP construction deliver rugged durability and efficient heat management. These design choices reduce thermal stress and extend service life in crowded control panels. Application: ideal for industrial automation cabinets where space is at a premium and reliability matters. Feature: The 0.5 kVA rating at 60 Hz single-phase with 240/480 V primary and 120/240 V secondary provides steady control power. Business impact: supports relays, sensors, and low-voltage devices without over-sizing the system, reducing energy waste. Application: panel boards, machine controls, and automation equipment in compact layouts. Feature: NEMA 3R enclosure with Indoor-Outdoor weathershield protects against moisture and dust, enabling versatile installation. Business impact: minimizes weather-related maintenance and downtime. Application: outdoor process lines and manufacturing floors. Feature: UL Listed certification ensures compliance with electrical safety standards. Business impact: simplifies procurement and risk management for engineers. Application: industrial OEMs and integrators needing verified safety credentials. Feature: Compact footprint and light weight—5.18 in depth, 4.45 in width, 9.34 in height, 14 lb—with a straightforward wiring connection (3A). Business impact: accelerates installation, reduces shipping and handling costs. Application: retrofit projects and space-constrained control panels.
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FAQs
The S20N11P51P is rated for 240/480 V primary and 120/240 V secondary in single-phase, 60 Hz systems. For installation, ensure mounting in a location with proper ventilation and within the NEMA 3R enclosure’s outdoor-indoor tolerance. Use a compliant panel housing, secure wiring to the 3A connection, and verify clearances per Eaton capacitance and insulation guidelines to optimize heat dissipation and lifecycle.
Key specs include 0.5 kVA VA rating, 60 Hz frequency, single-phase configuration, 240/480 V primary and 120/240 V secondary, aluminum coil material, and 57P frame. These figures ensure adequate power for relays, sensors, and small drives while maintaining predictable losses and manageable heat in compact panels.
Yes. The S20N11P51P uses a NEMA 3R enclosure designed for indoor-outdoor service and a weather-resilient Weathershield, enabling reliable operation in varied environments. When deploying outdoors, ensure proper mounting, drainage, and compliance with local standards to maximize protection against moisture, dust, and temperature swings.
The transformer is UL Listed, indicating adherence to recognized safety standards, which facilitates procurement and regulatory compliance. Its rugged enclosure supports safer operation in industrial settings and helps meet quality assurance requirements for OEMs and integrators working with automated equipment.
With a 0.5 kVA rating and robust aluminum-coil construction, the unit offers reliable service with low heat generation and extended life in demanding environments. The UL-listed safety certification reduces risk, while the 1-year warranty (or 18 months from shipment) provides protection against early failures, contributing to reduced downtime and lower total cost of ownership.