Eaton QS20N11S05CU Marine Duty Transformer - UL Listed
Part Number: QS20N11S05CU
Quick Summary
The Eaton QS20N11S05CU Marine Duty Transformer provides reliable step-down/up power conversion for harsh marine environments. Engineers face corrosion, moisture ingress, and tight installation constraints that complicate electrical distribution onboard. It carries UL Listed certification and is housed in a NEMA 3R enclosure, engineered for indoor-outdoor duty, with a copper-wound design that stands up to continuous operation at sea. The unit supports 60 Hz single-phase systems with 240/480 V primary and 120/240 V secondary, delivering 5 kVA for compact yet capable power distribution. By combining rugged construction with Eaton’s warranty and service policy, it reduces maintenance intervals, safeguards critical loads, and streamlines procurement for marine or industrial installations.
Product Information
Extended Description
QS20N11S05CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 3A5Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS20N11S05CU
UPC
786680031847
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
135 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
Design
EPM
Enclosure
NEMA 3R
Frame
177
Tap size
None
Type
Marine Duty Encapsulated Transformer
Wiring connection
3A5Q
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Feature: Copper windings and marine-duty encapsulation provide enhanced thermal stability and electrical efficiency. Business Impact: Lower copper loss and improved reliability translate to longer mean time between maintenance and reduced operating costs. Application: Ideal for shipboard distribution panels and harsh coastal facilities where consistent performance is critical. Feature: NEMA 3R enclosure design delivers effective moisture and weather protection. Business Impact: Protected operation in both indoor and outdoor environments minimizes corrosion risk and extends service life. Application: Deck, engine room, and outdoor electrical spaces on vessels and offshore installations. Feature: 5 kVA, 60 Hz single-phase configuration with 240/480 V primary and 120/240 V secondary. Business Impact: Simplified integration with common vessel and facility power systems reduces part proliferation and installation complexity. Application: Power conditioning for lighting, controls, and auxiliary loads on ships and industrial plants. Feature: 3A5Q wiring connection supports straightforward, code-compliant installation. Business Impact: Faster commissioning and easier field wiring troubleshooting. Application: Retrofit or new-build electrical cabinets with standardized connector layouts. Feature: 115 °C rise rating and robust construction enable reliable performance in elevated ambient temperatures. Business Impact: Maintains output stability under demanding duty cycles, reducing risk of voltage drop and load interruption. Application: Marine environments and industrial sites with limited cooling or high ambient conditions.
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FAQs
QS20N11S05CU uses a 3A5Q wiring connection, designed for straightforward integration into standard electrical cabinets. The unit weighs 135 lb and features a compact 9.89 in depth, 10.38 in width, and 16 in height, with a NEMA 3R enclosure suitable for indoor-outdoor installation on ships or harsh industrial sites.
The transformer operates at 60 Hz, is single-phase, with a primary voltage of 240 V or 480 V and a secondary voltage of 120/240 V. It is rated for a 5 kVA load, making it appropriate for mid‑sized vessel systems and similar industrial applications.
Yes. It is explicitly designed for marine duty with an encapsulated copper-wound construction and a NEMA 3R enclosure, enabling reliable operation in indoor-outdoor marine environments and coastal facilities while resisting moisture and corrosion.
The unit is UL Listed and features a NEMA 3R enclosure, providing weather-resistant protection for indoor-outdoor operation. These standards support compliance for maritime and industrial installations, helping with regulatory acceptance and safer installation practices on vessels and facilities.
Eaton backs QS20N11S05CU with a one-year warranty from installation or an 18-month warranty from shipment, whichever comes first, per policy 25-000. Comprehensive technical support and replacement options are available through Eaton’s service network to minimize downtime.