Eaton N44M28T33 K-13 Ventilated Transformer - UL Listed
Part Number: N44M28T33
Quick Summary
Eaton N44M28T33 is a K-Factor nonlinear ventilated transformer for heavy duty power distribution in industrial facilities. Engineers face overheating, insulation stress and voltage swings under non linear loads; this transformer helps manage those risks with a 150 °C rise rating and aluminum windings. UL Listed certification provides safety compliance for critical electrical systems, while three phase operation at 60 Hz supports scalable power. By combining robust construction with voltage taps and a weather shield ready frame, this unit delivers reliable performance and reduces maintenance costs in demanding environments.
Product Information
Extended Description
N44M28T33 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: 208Y/120V, 150°C, 300 kVA, Al windings , Elec. Shield, Frame: 919E, uses WS35
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N44M28T33
UPC
786680067990
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2786 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
919E
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
300 kVA
Phase
Three-phase
Primary voltage
440 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N44M28T33
Feature K-Factor nonlinear design delivers higher tolerance to non linear loading and harmonic currents, reducing stray losses and transformer overheating. The N44M28T33 uses a K-13 design with air cooling and ventilated construction to sustain reliable operation in demanding plants. This translates into fewer outages and longer service life for drives, presses and heavy machinery that draw fluctuating loads, even at near full rating. Feature Voltage regulation improvements are achieved through two plus 2.5 percent taps and four minus 2.5 percent taps, enabling precise voltage compensation for line drop and aging insulation. Practically, engineers obtain steadier 208Y/120 secondary voltages and reduced equipment stress, improving process stability and control reliability during peak demand. This capability helps minimize nuisance trips and extends control life in dynamic processes. Feature Aluminum windings with an electrostatic shield minimize copper weight and provide EMI suppression. The shield aids compliance with EMI/EMC expectations around control cabinets and communications gear, while lighter windings ease handling during installation and service. Operators gain cooler operation and improved efficiency, yielding lower energy costs over the transformer life. Feature Ventilated construction, WS35 weather shield compatibility, and a robust frame 919E support flexible installation. The ventilation path and rugged enclosure improve heat dissipation in hot environments, reducing the need for oversized rooms or extra cooling. This makes outdoor or harsh indoor installations feasible, enabling tighter layouts and simpler procurement from a single trusted supplier. Feature Safety and serviceability are underscored by UL Listed certification, documented 300 kVA rating, and Eaton support options. The combination of a 60 Hz three phase system with 440 V primary and 208Y/120 V secondary provides a ready to deploy solution for manufacturing lines, data centers and process facilities, with clear maintenance and warranty coverage.
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FAQs
Plan for a three phase, 60 Hz environment with a 440 V primary and 208Y/120 V secondary. The unit is heavy at 2786 lb and occupies a sizable footprint (36.23 in L, 44.2 in W, 75 in H) and uses WS35 weather shield compatibility. Ensure proper ventilation, electrical clearances, and mounting in a suitable enclosure or outdoor location to meet its ventilated design requirements.
The K-13 design provides improved tolerance to non linear loading by reducing peak voltage distortion and limiting stray heat. This results in more stable secondary voltage, less insulation stress, and lower risk of overheating during harmonic-rich operation. For industrial plants with variable loads, this translates to higher reliability and longer transformer life.
Yes. With a 300 kVA rating, 440 V primary and 208Y/120 V secondary, the N44M28T33 supports critical power distribution in data centers and manufacturing lines. The ventilated design, electrostatic shield and UL Listed certification help maintain uptime, support EMI compliance, and enable straightforward integration into existing power architectures.
The N44M28T33 is UL Listed, confirming electrical safety compliance for critical power systems. Additional certifications are not specified in the data, but the UL Listing, electric insulation ratings and the warranty terms provide confidence in reliability and regulatory alignment for industrial installations.
Eaton offers a warranty aligned with its policy 25-000, providing one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, the robust 919E frame, aluminum windings and electrostatic shielding facilitate longer intervals between service events and easier field servicing, backed by Eaton support networks and readily available spare parts.