Eaton N44M31T75 Transformer - UL Listed, K-13
Part Number: N44M31T75
Quick Summary
N44M31T75 transformer is a K-Factor nonlinear ventilated solution for three-phase power distribution in industrial facilities. Engineers often struggle to balance protection, efficiency, and space constraints while maintaining stable voltage under dynamic loads and harmonics. UL Listed certification ensures safety compliance, while aluminum windings, electrostatic shield, and WS19 weather shield boost durability in harsh environments. With a 75 kVA rating at 60 Hz and a frame 916A, the unit supports reliable, scalable distribution for manufacturing lines and processing plants. This combination helps minimize downtime, reduce energy waste, and simplify maintenance and procurement for engineering teams.
Product Information
Extended Description
N44M31T75 Eaton: K-Factor Non Linear Transformer, Ventilated, K-13, Three-phase, PV: 440V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 220Y/127V, 150°C, 75 kVA, Al windings , Elec. Shield, Frame: 916A, uses WS19
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N44M31T75
UPC
786685267104
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
650 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
Type
Ventilated transformer
Design
K-13
Frame
916A
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
75 kVA
Phase
Three-phase
Primary voltage
440 V
Secondary Voltage
220Y/127 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS19
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N44M31T75
Feature: K-13 nonlinear design and ventilation optimize heat dissipation and insulation life, reducing thermal stress during peak loading. Business Impact: lowers maintenance costs and extends transformer life in high-harmonic environments. Application: manufacturing plants, metal forming, and processing lines where voltage stability under surge is critical. Feature: 75 kVA three-phase rating with 440 V primary and 220Y/127 V secondary enables direct integration with common industrial feeders. Business Impact: minimizes intermediate hard-wiring steps and supports streamlined distribution. Application: switchgear rooms and motor control centers requiring compact, reliable step-down power. Feature: Tap changer capability—2 taps at +2.5% FCAN and 4 taps at -2.5% FCBN—for precise voltage regulation. Business Impact: maintains downstream voltage within tolerance during line swings and startup transients. Application: critical loads and systems sensitive to voltage drift, such as controls and PLCs. Feature: Aluminum windings with an electrostatic shield and WS19 weather shield provide EMI control and corrosion resistance. Business Impact: improves electrical performance and long-term reliability in challenging environments. Application: outdoor or harsh indoor installations where EMI and corrosion considerations drive uptime. Feature: Frame 916A with a 650 lb envelope and robust mechanical construction supports straightforward installation and mechanical compatibility with standard enclosures. Business Impact: reduces commissioning time and enables safer, repeatable maintenance. Application: retrofit projects and new builds in industrial facilities. Feature: UL Listed certification and Eaton warranty policy offer compliance assurance and post-sale support. Business Impact: supports procurement audits and risk management while simplifying vendor accountability. Application: large-scale plant upgrades and distribution modernization across manufacturing and distribution centers.
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FAQs
The N44M31T75 uses a 916A frame and measures 23.42 in deep, 28.22 in wide, and 48.56 in tall with an approx. 650 lb weight. It is designed for standard enclosure mounting and ventilated installations. Ensure adequate front and side clearance for cooling and maintenance access, and follow manufacturer mounting guidelines for optimal wind flow and EMI control.
This unit is a 75 kVA, three-phase transformer with a 440 V primary and 220Y/127 V secondary, rated for 60 Hz. It features taps at 2 at +2.5% FCAN and 4 at -2.5% FCBN, aluminum windings, and an electrostatic shield. Temperature rise is 150 °C, and it carries UL Listed certification for safety compliance.
Yes. The transformer employs a K-Factor nonlinear design (K-13) and ventilation to manage harmonic currents, reducing overheating and improving voltage regulation under harmonic-rich loads. For facilities with impactful harmonics, this design helps maintain reliability, extend insulation life, and minimize downtime compared with standard transformers.
The N44M31T75 is UL Listed, ensuring recognized safety certification for electrical equipment. Eaton provides a warranty policy of one year from installation or eighteen months from shipment, whichever comes first. This combination supports risk mitigation, warranty claims, and predictable long-term performance for mission-critical applications.
With solid heat management, voltage regulation via taps, and durable aluminum windings, this transformer reduces maintenance frequency and energy losses. Its robust enclosure and WS19 weather shield enable flexible placement, cutting installation complexity. Plan for periodic inspections of connections, insulation, and cooling to sustain peak efficiency and minimize unplanned downtime in industrial power networks.