Eaton 42-5949 Open core-coil transformer - UL Recognized
Part Number: 42-5949
Quick Summary
An Eaton Open core-coil transformer delivers compact, efficient three-phase power conversion for inverter and control-panel applications. Engineers often struggle with limited enclosure space, thermal buildup, and wiring complexity in modern automation systems. UL Recognized and UL Listed certifications provide regulatory confidence, while the insulation rated to 220 °C and an 80 °C rise support demanding duty cycles in inverter environments. This model’s 7.5 kVA rating, 60 Hz operation, and 356/320 V primary to 208Y/120 V secondary configuration align with common industrial mains and control needs. For panel builders and machine integrators, its aluminum coil, CT15J115 frame, and 266AS wiring simplify installation and improve reliability in compact footprints, reducing the total cost of ownership over the life of the equipment.
Product Information
Extended Description
42-5949 Eaton: 7.5 KVA AUXILIARY XFMR CORE-COIL 3PH 356/320-208Y/120
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
42-5949
UPC
786680131257
Product Length/Depth
1.1 in
Product Height
1.1 in
Product Width
1.1 in
Product Weight
1.1 lb
Compliances
Not Applicable
Certifications
UL Recognized UL Listed
Coil material
Aluminum
Frame
CT15J115
Insulation
220 °C
Tap size
None
Wiring connection
266AS
Frequency rating
60 Hz
Kva Rating
7.50 kVA
Phase
Three-phase
Primary voltage
356/320 V
Secondary Voltage
208Y/120 V
Sound Level
NEMA ST-20
Temperature rise
80 °C rise
Application
Inverter
Special features
Core-coil
Core-coil ventilated construction improves heat dissipation in restricted enclosures, delivering more consistent voltages under load. The business impact is lower enclosure temps, extended transformer life, and reduced cooling requirements for the overall system. In inverter and drive applications, this translates to fewer thermal-related faults and predictable performance within narrow service windows. The 7.5 kVA rating with three-phase operation provides ample headroom for control circuits and auxiliary loads. The business impact is robust power for drive electronics, stability for PLCs, and reduced risk of voltage sag during peak inverter activity. Inverter panels, CNCs, conveyors, and robotics benefit from reliable control power and minimized panel depth. Primary 356/320 V and secondary 208Y/120 V with 266AS wiring simplify harnessing and installation, while the absence of a tap changer reduces field maintenance. The aluminum coil, CT15J115 frame, and 220 °C insulation margin support durable operation in harsh environments with improved reliability. UL Recognized and UL Listed certifications streamline compliance audits, and the NEMA ST-20 compatible sound profile supports operation in noise-sensitive spaces. Application focus includes inverter systems and power-distribution panels, delivering dependable performance in automation environments.
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FAQs
The 42-5949 uses a CT15J115 frame and compatible wiring with 266AS terminations, supporting straightforward mounting in standard inverter and control-panel enclosures. Its 356/320 V primary and 208Y/120 V secondary voltages align with common industrial mains, enabling quick wiring harnesses and reduced panel depth during installation.
Key specs include a 7.50 kVA rating, three-phase operation, 60 Hz frequency, primary 356/320 V, secondary 208Y/120 V, aluminum coil, and insulation rated to 220 °C with an 80 °C rise. These specs support reliable inverter and control power with stable voltage under dynamic loads.
Yes. The core-coil ventilated design optimizes cooling in compact enclosures, while the 7.5 kVA rating and 208Y/120 V secondary provide robust control-power for inverter drives and automation panels, reducing voltage drop and improving drive performance in demanding environments.
This transformer is UL Recognized and UL Listed, aligning with robust safety and regulatory standards for industrial installations. These certifications help with compliance during audits and ensure the unit meets recognized safety criteria when deployed in production lines and control cabinets.
The ventilated core-coil design, aluminum winding, and high insulation margin contribute to reliable operation with reduced thermal aging and fewer cooling-related failures. Its simple wiring and lack of taps minimize field maintenance, supporting lower total cost of ownership over the equipment lifecycle.