Eaton QS20N11S07CU Marine Duty Transformer - UL Listed
Part Number: QS20N11S07CU
Quick Summary
Eaton QS20N11S07CU Marine duty encapsulated transformer is a reliable power isolation solution for marine and rugged outdoor electrical systems. Engineers often face corrosion, moisture, and space constraints in harsh environments, making enclosure integrity and material choice critical. UL Listed certification and a NEMA 3R enclosure design help ensure safety and performance in corrosive marine settings. This transformer also aligns with your facility’s need for compact, durable power conversion at 60 Hz, while supporting standard 240/480 V primary and 120/240 V secondary configurations to simplify panel design and maintenance. By selecting this unit, you gain resilient marine readiness alongside operational efficiency for continuous, compliant power distribution.
Product Information
Extended Description
QS20N11S07CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 178, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 7.5 KVA, indoor-outdoor, 3A7Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS20N11S07CU
UPC
786680031854
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
128 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
178
Tap size
None
Type
Marine Duty Encapsulated Transformer
Wiring connection
3A7Q
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
7.5 kVA
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: Copper coil windings reduce energy losses and improve thermal performance, delivering reliable voltage conversion under load while minimizing heat generation in confined spaces aboard vessels. Application: Suitable for compact switchgear in engine rooms or deck panels where space is at a premium and efficiency matters. Feature → Business Impact → Application: Encapsulated EPM design provides robust moisture resistance and vibration tolerance, extending service life in corrosive marine environments. Application: Ideal for outdoor installations on deck or near weather-exposed equipment where stability and reliability are crucial. Feature → Business Impact → Application: NEMA 3R enclosure offers indoor-outdoor protection, enabling installation in varied climates without additional enclosure. Application: Streamlines installation across indoor machinery spaces and exposed outdoor panels. Feature → Business Impact → Application: 7.5 kVA, single-phase, 240/480 V to 120/240 V transformation supports standard power conversion for AUX systems, lighting, and instrumentation. Application: Facilitates flexible downstream wiring in marine electrical schemes. Feature → Business Impact → Application: 60 Hz, copper coil, and UL Listed certification provide predictable performance and compliance. Application: Reduces risk during regulatory audits and ensures compatibility with common shipboard electrical specs. Feature → Business Impact → Application: Indoor-Outdoor Weathershield compatibility and compact frame (178) support easy retrofits and new builds. Application: Expedites installation in retrofit projects and new vessel builds while maintaining serviceability and future-proofing.
Get a Quick Quote for a Eaton QS20N11S07CU
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 QS20N11S07CU?
Enquire Now
FAQs
Install the unit in a location compliant with a NEMA 3R enclosure and secure it within a chassis designed for marine use. Use the 3A7Q wiring connection per Eaton’s guidance, ensure correct cooling clearance, and connect 240/480 V primary to the supply and 120/240 V secondary to downstream circuits. Follow safety procedures for lockout/tagout and verify UL Listed labeling after installation.
The transformer is single-phase, 60 Hz, with a volt-ampere rating of 7.5 kVA. Primary voltage options are 240 V and 480 V, with a secondary of 120/240 V. It uses copper windings and features a 115 °C rise temperature, making it suitable for continuous operation in demanding environments while supporting standard marine electrical loads.
Yes. Designed for marine duty with a rugged encapsulated construction and a NEMA 3R enclosure, it is well-suited for boat electrical systems, offshore equipment, and other outdoor or humid environments where reliable isolation and power conversion are required. Its compact form factor and copper windings support durable marine reliability and ease of integration.
The unit carries UL Listed certification, providing recognized electrical safety assurance. The enclosure is rated NEMA 3R for indoor-outdoor protection, which supports compliance in varied marine environments. While the primary specifications cover performance, the UL listing and enclosure rating are the principal regulatory assurances for this transformer.
Copper windings and encapsulated design inherently reduce moisture ingress and corrosion risk, lowering maintenance needs in harsh marine environments. The 1-year Eaton warranty (or 18 months from shipment) adds installation protection, while the robust construction minimizes downtime and service costs, delivering a reliable return on investment for critical vessel or offshore equipment power systems.