Eaton S48N27S05 Transformer - UL Listed
Part Number: S48N27S05
Quick Summary
The Eaton S48N27S05 Transformer provides reliable voltage transformation for industrial control panels. Facility teams often struggle with bulky, weather-exposed devices that fail under moisture or heat, causing downtime. UL Listed, a rugged NEMA 3R enclosure, and an indoor-outdoor design help meet safety codes while withstanding harsh environments. This 5 kVA, single-phase transformer steps down from 480 V to 277 V at 60 Hz, with aluminum windings and a 115 °C rise rating for improved efficiency. Designed for standard automation architectures and broad compatibility, it delivers predictable performance while simplifying procurement and service planning for power distribution engineers.
Product Information
Extended Description
S48N27S05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 480 V, 277 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 511G
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S48N27S05
UPC
786685183862
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
110 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
177
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
511G
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
480 V
Secondary Voltage
277 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated transformer with aluminum coil. Business Impact: Delivers durable, corrosion-resistant construction that withstands factory dust, moisture, and temperature swings, while aluminum windings enable efficient heat dissipation and lighter field handling. Application: Ideal for control panels and distribution enclosures across manufacturing facilities, including spaces with limited rack depth, where reliable, compact power conversion is essential to keep lines running. Feature: 60 Hz, single-phase operation with a 480 V primary and 277 V secondary at 5 kVA. Business Impact: Aligns with common supply architectures and reduces the need for custom solutions, supporting faster project timelines and simpler spare-part inventories. Application: Use in automation cabinets, machine tools, and conveyor systems to provide a stable low-voltage feed for relays, PLCs, and sensors. Feature: NEMA 3R enclosure with Weathershield enabling indoor-outdoor usage. Business Impact: Enables outdoor installations and damp environments without additional enclosure addenda or weatherproof upgrades, which lowers total installed cost. Application: Perfect for plant floor panels, outdoor controls, and weather-exposed cabinets in harsh industrial environments where reliability and maintenance windows matter. Feature: Aluminum coil and 115 °C rise rating. Business Impact: Improves heat dissipation and efficiency, while maintaining performance under higher load, extending transformer life. Application: Continuous-duty applications in demanding environments, including equipment start-ups and peak-load scenarios in manufacturing facilities. Feature: UL Listed certification and defined warranty terms. Business Impact: Streamlines procurement, ensures compliance with safety standards, and reduces lifecycle risk for mission-critical applications. Application: Replacement-ready asset for maintenance teams and new installations in power distribution cabinets across manufacturing, water treatment, and packaging lines.
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FAQs
For installation, ensure proper mounting in a space with adequate clearance for airflow, access to wiring, and ventilation. Use the 511G wiring configuration and compatible Eaton accessories. The unit’s 9.89 in depth, 16 in height, and 10.38 in width shape mounting footprints, and plan for a 110 lb weight during field placement. Mounting on standard racks or panels simplifies retrofit projects and minimizes modification work.
The transformer operates at 60 Hz, single-phase, with a 480 V primary and 277 V secondary, rated at 5 kVA. It is suited for control panels, automation cabinets, machine tools, and conveyors, providing a stable low-voltage feed for relays, PLCs, and sensors while fitting common plant power distributions.
The unit is UL Listed, meeting recognized safety standards for electrical equipment. Warranty terms follow Eaton policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This combination supports procurement compliance and reduces risk in mission-critical applications.
Aluminum windings offer improved heat dissipation and corrosion resistance, contributing to better thermal management and longer service life in variable humidity and temperature conditions. The lighter coil also eases handling during installation and replacements, while maintaining electrical performance across typical industrial loads.
Yes. The NEMA 3R enclosure with indoor-outdoor versatility, combined with the Weathershield design, enables safe outdoor or damp-area installations without additional protective housings. This flexibility supports outdoor equipment racks and weather-exposed controls, reducing total installed cost and downtime risk for outdoor automation systems.