Eaton S48G27S05 General-Purpose Transformer - UL Listed
Part Number: S48G27S05
Quick Summary
The Eaton S48G27S05 General-Purpose Transformer provides reliable single-phase isolation for 480 V mains feeding 277 V loads in industrial panels. When installations operate in challenging environments, unprotected transformers can suffer moisture ingress, overheating, and unplanned downtime. This unit ships UL Listed with a rugged NEMA 3R enclosure, making it suitable for indoor-outdoor use and compliant with demanding codes. The design also leverages an aluminum coil and a 5 kVA rating to balance performance with cost. By combining durability with straightforward installation, this transformer supports robust power distribution while enabling simpler maintenance and faster panel upgrades, aligning with broader industrial automation and electrical components strategies.
Product Information
Extended Description
S48G27S05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 480 V, 277 V, 2 at -5% FCBN, 115 °C rise, 5 KVA, indoor-outdoor, 535E
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S48G27S05
UPC
786685197340
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
100 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
2 at -5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
535E
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: 5 kVA, single-phase transformer with 480 V primary and 277 V secondary. Business Impact: Enables direct feed to 277 V loads from 480 V mains, reducing cascading equipment and saving panel space. Application: Control panels and machine enclosures in manufacturing lines benefit from compact, reliable power conversion. Long-tail keywords: 5 kVA transformer, single-phase 480 V to 277 V transformer, industrial power distribution. Feature: Aluminum coil construction. Business Impact: Lower material costs and weight, improving handling and installation efficiency while maintaining durability. Application: Modular switchgear and outdoor installations where weight and corrosion resistance matter. Long-tail keywords: aluminum coil transformer, durable encapsulated transformer. Feature: NEMA 3R enclosure with indoor-outdoor readiness. Business Impact: Weather resistance minimizes enclosure upgrades and downtime in harsh environments. Application: Outdoor electrical rooms and damp facilities. Long-tail keywords: NEMA 3R enclosure transformer, indoor-outdoor transformer. Feature: Tap size 2 at -5% FCBN. Business Impact: Voltage regulation flexibility supports precise load compatibility and fewer field adjustments. Application: Facilities with variable voltage requirements. Long-tail keywords: voltage regulation taps, -5% FCBN taps. Feature: 115°C rise and UL Listed certification. Business Impact: Thermal margin supports reliability under peak loads while meeting safety and code compliance. Application: High-duty-cycle power distribution in industrial settings. Long-tail keywords: 115°C rise transformer, UL Listed transformer.
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FAQs
The S48G27S05 is a 5 kVA, single-phase transformer with a 480 V to 277 V output, designed for standard control panels. Ensure the panel enclosure supports indoor-outdoor use, verify clearance for the NEMA 3R enclosure, and match field wiring to the 535E wiring configuration. Mounting hardware and torque specs follow common low-voltage power distribution practices, enabling straightforward retrofit or new-panel installations.
The transformer features a 480 V primary voltage and a 277 V secondary voltage, operating at 60 Hz in a single-phase configuration. It is rated at 5 kVA, with two taps at -5% FCBN for voltage regulation, suitable for feeding 277 V loads from a 480 V supply and maintaining stable downstream voltages.
Yes. It uses a NEMA 3R enclosure and Weathershield indoor-outdoor construction, enabling reliable operation in outdoor or damp indoor environments. This makes it ideal for outdoor electrical rooms, loading docks, or partially protected panel spaces without additional enclosure enhancements.
The transformer is UL Listed, confirming compliance with recognized safety standards for electrical equipment. The NEMA 3R enclosure further supports code-compliant outdoor installations. These certifications help streamline inspections, reduce risk during audits, and simplify procurement for regulated facilities requiring proven safe-for-use components.
With aluminum coil construction and a robust encapsulated design, the unit delivers low maintenance needs and extended service life, reducing downtime and replacement costs. The 115°C rise rating provides ample thermal margin for peak loads, contributing to predictable performance and improved return on investment in continuous operation environments.