Eaton S20N11P51PCU Encapsulated Transformer - UL Listed
Part Number: S20N11P51PCU
Quick Summary
Eaton S20N11P51PCU is a general-purpose encapsulated transformer for indoor and outdoor control panels. In space-constrained automation environments, engineers contend with reliability, heat, and moisture ingress that can disrupt uptime. UL Listed safety certification, a NEMA 3R enclosure, and copper windings deliver rugged protection and regulatory compliance in demanding sites. Its 0.5 kVA rating supports reliable control power for PLCs and sensors, while a compact form simplifies panel layout and reduces installation time. This solution is designed for modern automation architectures, offering predictable lifecycle costs and easy integration with standard low-voltage distribution practices.
Product Information
Extended Description
S20N11P51PCU Eaton: Eaton General purpose encapsulated transformer, EP, copper, 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
S20N11P51PCU
UPC
786680097645
Product Length/Depth
5.18 in
Product Height
9.34 in
Product Width
4.45 in
Product Weight
17 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
Copper
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
Feature: Copper coil windings in an EP encapsulated design deliver low resistance and robust thermal management. Business Impact: improves efficiency and reduces heat buildup in compact panels, extending component life and lowering maintenance costs. Application: ideal for dense control cabinets powering PLCs, relays, and sensors in high‑density automation environments. Feature: NEMA 3R enclosure provides indoor-outdoor protection. Business Impact: minimizes weather-related downtime and corrosion risk, enabling outdoor or semi-exposed installations. Application: outdoor control panels near loading docks or exterior machinery. Feature: 0.5 kVA, single-phase operation with primary 240/480 V and secondary 120/240 V. Business Impact: flexible power for low‑voltage circuits, reducing the need for additional converters and stock. Application: small automation panels, motor starters, and HVAC controllers. Feature: 115 °C rise rating supports reliable performance under higher ambient temperatures. Business Impact: reduces derating and ensures consistent output in warm environments. Application: process plants and factory floors with limited cooling capacity. Feature: Compact footprint (5.18 in depth, 4.45 in width, 9.34 in height) and 17 lb weight. Business Impact: easy fit in tight panels and simpler installation, lowering installation time and crane requirements. Application: retrofit projects and new builds with space constraints. Feature: UL Listed certification and Eaton warranty. Business Impact: procurement confidence and long-term support for maintenance planning. Application: standard specification in control power and distribution setups.
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FAQs
The S20N11P51PCU is a general-purpose encapsulated transformer rated at 0.5 kVA, designed to supply 120/240 V secondary from 240/480 V primary for compact control panels. It supports PLCs, relays, and sensors in both indoor and outdoor settings, simplifying cabinet design and reducing the need for multiple power supplies.
Yes. The unit comes in a NEMA 3R enclosure and is rated for indoor-outdoor use, providing moisture and environmental protection. Its rugged construction and UL Listed certification ensure reliable operation in outdoor control cabinets, near loading docks, or exterior machinery without additional enclosure upgrades.
Eaton offers a one-year limited warranty from installation or eighteen months from shipment, whichever comes first. This policy supports lifecycle planning, helps with maintenance budgeting, and ensures access to Eaton’s technical support for field service or replacement considerations.
The S20N11P51PCU is a single-phase, 60 Hz transformer with a 0.5 kVA rating. Primary voltages are 240 V and 480 V, and secondary voltages are 120/240 V. It uses copper windings and is designed for reliable, compact power conversion in automation panels.
UL Listed certification confirms safety and compliance with applicable standards, aiding procurement and audit readiness. The NEMA 3R enclosure protects internal components from moisture and environmental exposure, reducing corrosion risk and maintenance downtime in harsh environments, while also supporting outdoor or mixed-indoor installations.