Eaton N48M31B49CU K-Factor Transformer - UL Listed
Part Number: N48M31B49CU
Quick Summary
Eaton N48M31B49CU is a K-Factor nonlinear ventilated transformer designed for reliable three-phase power distribution in industrial facilities. Engineers often grapple with voltage stability and overheating under nonlinear loads, which can throttle uptime and drive maintenance costs. UL Listed certification validates safety and regulatory compliance for harsh environments, while the 80°C rise, copper windings, and an electrostatic shield bolster protection. Designed for Eaton’s 918A frame and WS34 weather shield, it offers installation flexibility, straightforward retrofits, and scalable capacity up to 45 kVA, supporting growing facilities and mission-critical equipment in manufacturing, data centers, and process industries.
Product Information
Extended Description
N48M31B49CU Eaton: K-Factor nonlinear ventilated transformer K-13, Three-phase, PV: 480V, Taps: 2 at 0.025 FCAN, 4 at -0.025 FCBN, SV: 220Y/127V, 80°C, 45 kVA, Cu windings, Elec. Shield, Frame: 918A
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M31B49CU
UPC
786680080500
Product Length/Depth
30.68 in
Product Height
62.18 in
Product Width
31.44 in
Product Weight
1599 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
Type
Ventilated transformer
Design
K-13
Frame
918A
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
45 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
220Y/127 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS34
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M31B49CU
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: K-Factor nonlinear ventilated design; Business Impact: improves voltage regulation under nonlinear loading and enhances cooling efficiency; Application: suitable for facilities with mixed harmonic loads and high-duty cycles, such as metal fabrication lines and automated packaging cells. The ventilated design reduces thermal hotspots, extending transformer life and reducing unscheduled downtime. Feature: 45 kVA three-phase capability with 480 V primary and 220Y/127 V secondary; Business Impact: supports scalable distribution to critical loads while maintaining tight voltage control; Application: power distribution for manufacturing floors, CNC areas, and control panels where consistent voltage is essential. Feature: Copper windings with electrostatic shielding; Business Impact: higher electrical conductivity, improved efficiency, and fault isolation; Application: environments with electromagnetic interference and high short-circuit risk, helping protect sensitive drives and PLCs. Feature: Tap settings 2 at +2.5% FCAN and 4 at -2.5% FCBN; Business Impact: precise voltage adjustment to compensate for line swings; Application: process lines and data centers where small voltage deviations can affect performance. Feature: Frame 918A and Weathershield WS34; Business Impact: easier installation and robust outdoor or harsh-environment protection; Application: outdoor substations, factories with exposure to dust, humidity, or temperature variation. Feature: 80°C rise rating and UL Listed; Business Impact: predictable thermal performance and compliance for industrial specs; Application: procurement in audits, maintenance planning, and long-term ROI calculations, reducing unexpected outages.
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FAQs
The N48M31B49CU is designed for Eaton’s 918A frame and utilizes the WS34 weather shield, enabling straightforward retrofit into compatible enclosure footprints. Verify frame size, mounting clearances, and electrical clearances for three-phase 480 V primary and 220Y/127 V secondary configurations. Check panel interface, shield integration, and cooling clearance to ensure unobstructed airflow and compliant installation in your facility.
Key specs include a 45 kVA rating, 60 Hz operation, primary 480 V, secondary 220Y/127 V, and an 80 °C rise. The transformer employs a K-Factor nonlinear design with copper windings and electrostatic shielding to improve voltage regulation under harmonics, reduce thermal hotspots, and maintain stability for drives, inverters, and mixed-load equipment.
Yes. With a 45 kVA three-phase capacity, 480 V primary, 220Y/127 V secondary, and tight voltage regulation under nonlinear loading, it is well-suited for data centers and manufacturing lines. The ventilated cooling and shielded windings help protect sensitive equipment, while the WS34 weather shield provides weather resistance in semi-outdoor installations.
The N48M31B49CU is UL Listed, validating compliance with widely recognized safety standards for industrial transformers. This certification supports downstream approvals, procurement audits, and installation in regulated environments. If your facility requires additional regional certifications, verify with Eaton or your local authority having jurisdiction (AHJ) for any supplementary requirements.
Eaton provides a warranty policy of one year from installation or eighteen months from shipment, whichever occurs first. This shortens risk for initial deployments while offering long-term protection against manufacturing defects. Coupled with durable copper windings, robust shielding, and reliable cooling, the N48M31B49CU helps minimize downtime and extend asset life, supporting a favorable total cost of ownership.