Eaton QS20N11S10CU Marine Duty Transformer - UL Listed
Part Number: QS20N11S10CU
Quick Summary
The Eaton QS20N11S10CU marine duty encapsulated transformer delivers rugged power conversion for marine and outdoor applications. Engineers often wrestle with moisture, space constraints, corrosion, and maintenance in coastal equipment rooms, risking downtime and costly repairs during peak vessel operations. UL Listed safety certification with a NEMA 3R enclosure supports dependable operation in varied conditions, while copper windings and an EPM design boost efficiency, thermal performance, and long-term reliability. This indoor-outdoor, single-phase transformer supports 60 Hz operation with 240/480 V primary and 120/240 V secondary, enabling scalable power distribution for 10 kVA loads on ships, offshore platforms, and remote marinas. For procurement teams, this design reduces part numbers, simplifies stocking, and delivers predictable performance in critical operations.
Product Information
Extended Description
QS20N11S10CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 179, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 10 KVA, indoor-outdoor, 3A10Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS20N11S10CU
UPC
786680031861
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
229 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
179
Tap size
None
Type
Marine Duty Encapsulated Transformer
Wiring connection
3A10Q
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
10 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - QS20N11S10CU
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Marine duty encapsulated construction provides sealed protection against moisture and salt spray. Business Impact: This dramatically reduces corrosion risk and downtime in harsh aquatic environments, helping maintenance teams meet uptime targets. Application: Ideal for shipboard panels, marina electrical rooms, and offshore equipment where environmental exposure is constant. Additional: The rugged housing supports a compact footprint, enabling flexible layouts in crowded machinery spaces. Feature: Copper windings with an efficient EPM design deliver lower losses and reliable heat management. Business Impact: Higher efficiency translates to cooler operation, reduced energy costs, and longer transformer life in continuous-duty service. Application: Suitable for critical loads and continuous operation aboard vessels, docks, and coastal facilities. Industry insight: Copper windings resist aging and support better short-term overload tolerance in intermittent peak demand scenarios. Feature: NEMA 3R enclosure provides rugged indoor-outdoor mounting flexibility. Business Impact: Enables safe installation in damp engine rooms or outdoor electrical hubs without weatherproof kits. Application: Works well for outdoor walkways, pilings, and protected outdoor panels on ships and offshore rigs. Objection handling: No need for extra enclosure upgrades when upgrading to 10 kVA loads; installation remains straightforward. Feature: 10 kVA rating with 60 Hz single-phase operation and primary 240/480 V, secondary 120/240 V. Business Impact: Supports common shipboard and marina loads with a single device, reducing panel count and wiring complexity. Application: Ideal for lighting, controls, and small motor circuits in marinas, yards, and offshore crews. Note: Compatible with Eaton's 3A10Q wiring connection to simplify field terminations. Feature: UL Listed certification and documented warranty. Business Impact: Provides compliance assurance and predictable maintenance planning. Application: Procurement-ready for global deployments where safety and service support matter most. Insight: The included warranty policy covers one year from installation or 18 months from shipment per Eaton policy.
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FAQs
For marina or shipboard installations, mount the encapsulated transformer in a dry, well-ventilated space with clearance for service access. Utilize the 3A10Q wiring connections for straightforward terminations, and ensure the NEMA 3R enclosure remains closed to maintain its ingress protection. Confirm 60 Hz operation and verify 240/480 V primary and 120/240 V secondary are consistent with system design.
The unit is a 10 kVA, single-phase transformer operating at 60 Hz. Primary voltages available are 240 V or 480 V, with a secondary of 120/240 V. It uses copper windings and is designed for compact, efficient power distribution in marine settings, supporting reliable isolation for critical loads.
Yes. The transformer is specifically designed for marine duty with an encapsulated construction and a NEMA 3R enclosure, making it suitable for indoor-outdoor service on ships, marinas, and offshore platforms. UL Listed certification adds a layer of safety compliance, reducing risk during procurement and installation.
QS20N11S10CU is UL Listed, and features a NEMA 3R enclosure for weather resistance in marine environments. These certifications support regulatory compliance, ease procurement, and simplify maintenance planning by confirming safety performance in harsh conditions.
Warranty is Eaton Selling Policy 25-000, covering one year from installation or eighteen months from shipment, whichever occurs first. This provides post-sale support and predictable replacement timing, helping with total cost of ownership calculations for coastal or offshore projects.