Eaton S20N11E51A Encapsulated Transformer - UL Listed
Part Number: S20N11E51A
Quick Summary
Eaton S20N11E51A Encapsulated transformer provides reliable low-voltage isolation for general purpose control panels and industrial equipment. In many facilities, designers struggle with space constraints, moisture exposure, and wiring compatibility in rugged environments; this unit’s compact footprint and robust enclosure help simplify installation and reliability. Key certifications and ratings include UL Listed safety certification and a NEMA 3R enclosure, enabling safe operation across indoor and outdoor locations. With a 0.5 kVA rating and 60 Hz operation, it supports scalable control schemes and energy management without overhauling existing systems.
Product Information
Extended Description
S20N11E51A Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 57, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 0.5 KVA, indoor-outdoor, 90A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11E51A
UPC
786680104527
Product Length/Depth
4.91 in
Product Height
8.97 in
Product Width
4.87 in
Product Weight
19 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
57
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
0.5 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature: General specifications deliver 0.5 kVA, single-phase operation at 60 Hz with 240/480 V primary and 120/240 V secondary. Business impact: Provides stable, isolated power for control circuits, reducing voltage fluctuations and protecting PLCs, relays, and sensors. Application: Ideal for control panels, machine interfaces, and small motors in manufacturing environments. Paragraph 2: Feature: NEMA 3R enclosure and EP design provide weather-resistant protection. Business impact: Enables indoor-outdoor installation, reducing maintenance costs and extending service life in harsh environments. Application: Outdoor control cabinets, wash-down areas, and exposed installations. Paragraph 3: Feature: Aluminum coil and compact footprint with dimensions of 4.91 in L × 4.87 in W × 8.97 in H and a weight of 19 lb. Business impact: Easier handling and faster retrofit installations with a lighter, durable unit. Application: Retrofit projects and space-constrained panels. Paragraph 4: Feature: Temperature rise rated at 115 °C. Business impact: Thermal margin supports continuous operation under typical industrial loads, improving uptime. Application: High-duty control circuits in hot environments. Paragraph 5: Feature: UL Listed certification and standard 25-000 Eaton warranty. Business impact: Regulatory compliance and responsive support reduce risk and maintenance costs. Application: Any compliant, service-backed installation across industrial facilities.
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FAQs
Ensure the enclosure is rated for indoor-outdoor use (NEMA 3R) and mount the transformer securely within the panel. Connect primary leads to 240 V or 480 V supply and secondary to 120/240 V circuits, observing proper wiring practices and clearance for heat dissipation. Verify the unit is UL Listed prior to commissioning and confirm compatibility with your PLC and sensor networks.
The transformer is 0.5 kVA, single-phase, operating at 60 Hz. Primary voltage options are 240 V or 480 V, with a secondary of 120/240 V. It features an aluminum wound coil and a temperature rise of 115 °C, suitable for continuous operation in appropriate loads.
Yes. The unit features a NEMA 3R enclosure and indoor-outdoor WeatherShield, providing weather resistance for outdoor and semi-exposed installations, while maintaining safe operation and ease of access for maintenance.
The transformer is UL Listed, a key safety certification for electrical hardware. Its NEMA 3R enclosure rating supports regulatory compliance for indoor-outdoor use, making it suitable for a wide range of industrial environments.
The product carries Eaton’s warranty per policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This, combined with UL safety certification and reliable performance, helps reduce maintenance costs and downtime over the life of the asset.