Eaton T20P11S05ZZ Open Core-Coil Transformer UL Recognized
Part Number: T20P11S05ZZ
Quick Summary
Open core-coil transformer provides reliable single-phase power for control panels and light industrial equipment. Engineers often grapple with overheating, voltage drift, and maintenance bottlenecks in compact enclosures. This Eaton model carries UL Recognized certification, underpinning safety compliance in North American installations. It uses a dry-type, ventilated open-core design to maximize cooling and extend service life, while aluminum windings offer excellent efficiency under load. With a 5 kVA rating and dual primary voltages (240 or 480 V) feeding a 120/240 V secondary, the unit supports voltage flexibility in evolving automation systems. The combination of robust build, accessible taps, and a proven frame (DS-3, 815C) translates to reduced downtime and lower lifecycle costs for panel builders and OEMs.
Product Information
Extended Description
T20P11S05ZZ Eaton: General-Purpose Transformer, Ventilated, Dry Type Distribution, DS-3, Single-phase, PV: 240 X 480V, Taps: 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 120/240V, 150°C, 5 kVA, Al windings, Frame: 815C
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
T20P11S05ZZ
UPC
786680057885
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
133 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 Recognized
Catalog Notes
Open type core and coil assembly
Coil material
Aluminum
Design
DS-3
Frame
815C
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Dry Type Distribution Transformer
Frequency rating
60 Hz
Kva Rating
5 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - T20P11S05ZZ
Selling Policy 25-000 - Distribution and Control Products and Services
Open-core, ventilated design minimizes hot spots by promoting airflow around the windings, which reduces energy losses and extends transformer life. This translates to measurable efficiency gains in panel assemblies and lower cooling requirements in enclosures. In practice, engineers can position the unit closer to controllable devices without thermal drift, especially in dense automation racks. With a 5 kVA rating, single-phase operation, and primary options of 240 or 480 V feeding a 120/240 V secondary, this transformer fits control circuits in machine tools and packaging lines. The compact, open-frame construction supports easy wiring and fast integration with standard control voltages, simplifying spare parts planning and reducing installation time. Taps at +5% FCAN, -5% FCBN, and ±2.5% FCAN/FCBN provide voltage adjustments to accommodate supply variations and load changes. This avoids oversized relays and reduces runtime losses. Coupled with DS-3 design, the unit allows straightforward field adjustment during commissioning or after wiring changes without disassembly. Aluminum windings offer good conductivity with weight and corrosion resistance, improving durability in industrial environments. The 150°C rise rating ensures robust performance under typical loading, while the 815C frame and open-core DS-3 geometry deliver a reliable fit in control cabinets and switchgear enclosures. UL Recognized certification supports compliance in North American installations, while the dry-type, open-core design reduces maintenance compared with liquid-filled options. The unit's warranty—one year from installation or 18 months from shipment—provides confidence for OEMs and service teams across the product life cycle.
Get a Quick Quote for a Eaton T20P11S05ZZ
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton T20P11S05ZZ?
Enquire Now
FAQs
Install in a ventilated enclosure to leverage the open-core, dry-type design. The unit weighs 133 lb and uses a DS-3 frame 815C, so secure mounting and adequate cabinet support are essential. Ensure accessible tap settings (+5%, -5%, ±2.5%) remain reachable during commissioning, and follow UL Recognized safety guidelines for wiring and clearances.
Specifications include a 5 kVA rating, 60 Hz frequency, single-phase operation, primary voltages of 240 V or 480 V, and a secondary of 120/240 V. Winding material is aluminum, with a temperature rise of 150 °C. Tap settings are +5% FCAN, -5% FCBN, and ±2.5% FCAN/FCBN, all within the DS-3, 815C frame design.
Yes. Its dual primary (240/480 V) feeding a 120/240 V secondary makes it ideal for control panels and machines that require flexible input voltages and common secondary voltages. The dry-type, ventilated design supports safe operation in industrial environments, while the aluminum windings and 5 kVA rating provide reliable, efficient power delivery with straightforward wiring.
The transformer is UL Recognized, which supports compliance in North American electrical installations and simplifies sourcing and documentation for safety approvals. This certification, combined with its dry-type construction and DS-3 design, helps meet typical industrial and panel-building safety standards, reducing risk during audits and customer approvals.
Expect low maintenance due to the dry-type design and open-core ventilation, which reduces cooling requirements and thermal stress. With a 5 kVA rating, aluminum windings, and a robust 150 °C rise, it delivers dependable service over time. A one-year warranty (or 18 months from shipment) provides additional protection, supporting predictable lifecycle costs and faster ROI for OEMs.