Eaton QS20N11S03CU Marine duty encapsulated transformer - UL Listed
Part Number: QS20N11S03CU
Quick Summary
Eaton QS20N11S03CU marine duty encapsulated transformer provides reliable 3 kVA power isolation for marine and industrial applications. Users confront moisture, vibration, and space constraints in shipyards, offshore sites, and rugged facilities, driving the need for durable, serviceable transformers. UL Listed certification and a NEMA 3R enclosure protect against weather exposure, with copper windings and an EPM design for long-life operation. Compact dimensions and indoor-outdoor suitability enable flexible mounting and simplified onboarding for retrofit projects. This leads to lower maintenance costs, improved uptime, and predictable performance for critical equipment across maritime, industrial, and outdoor power networks.
Product Information
Extended Description
QS20N11S03CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 176, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 3A3Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS20N11S03CU
UPC
786680031830
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
72 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
176
Tap size
None
Type
Marine Duty Encapsulated Transformer
Wiring connection
3A3Q
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
3 kVA
Weathershield
Indoor-Outdoor
Feature: Marine duty encapsulated construction with copper windings and an EPM core. Business Impact: Minimizes moisture ingress and vibration, extending service life and reducing maintenance. Application: Ideal for shipboard panels, offshore platforms, and rugged outdoor installations. Feature: Power ratings and voltage flexibility: 3 kVA, 60 Hz single-phase with primary 240/480 V and secondary 120/240 V. Business Impact: Enables seamless integration with common marine and industrial power systems, minimizing interconnection issues and startup time. Application: Power control circuits, instrumentation, and lighting in harsh environments. Feature: NEMA 3R enclosure for indoor-outdoor use. Business Impact: Weatherproof protection reduces corrosion risk and downtime in variable climates. Application: Dockside equipment enclosures, wet-dry locations, and outdoor electrical rooms. Feature: Copper windings and EPM design with UL Listed certification. Business Impact: High efficiency and safety compliance support regulatory audits while lowering energy losses. Application: Any system requiring durable copper-wound transformers for critical loads. Feature: Compact profile and simple wiring (8 in L x 7.69 in W x 14.25 in H, 72 lb) with 3A3Q connections and indoor-outdoor versatility. Business Impact: Simplifies installation, reduces mounting footprint, and accelerates retrofits in space-constrained settings. Application: Retrofit projects, shipyards, and portable power setups.
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FAQs
QS20N11S03CU is designed for compact installation with its 8 in L × 7.69 in W × 14.25 in H footprint and a 72 lb weight. Wiring uses the 3A3Q connection, which simplifies terminations in shipboard and dockside panels. When mounting, ensure secure weatherproofing and adequate clearance for heat dissipation, leveraging the NEMA 3R enclosure for indoor-outdoor use.
This transformer delivers 3 kVA at 60 Hz in a single-phase configuration, with primary voltages of 240 V or 480 V and a secondary of 120/240 V. It utilizes copper windings and features a copper coil design for efficiency, a 115 °C rise rating, and a NEMA 3R enclosure suitable for indoor-outdoor environments while carrying UL Listed certification.
Yes. The transformer uses a marine-duty encapsulated design inside a NEMA 3R enclosure, making it appropriate for outdoor and wet-dry locations. UL Listed certification further supports regulatory compliance, while copper windings and the EPM design provide durable, reliable operation in harsh maritime conditions.
QS20N11S03CU carries UL Listed certification for safety and reliability. It is protected by Eaton’s warranty policy, offering one year from installation or eighteen months from the date of shipment, whichever occurs first. This combination supports compliance audits and provides predictable post-purchase service terms.
The encapsulated marine duty design reduces moisture-related degradation and vibration-induced wear, translating to lower maintenance costs and longer intervals between service. With a compact footprint, robust enclosure, and efficient copper windings, the 3 kVA transformer supports higher uptime for critical loads in maritime, offshore, and rugged outdoor power networks, delivering faster payback on retrofit projects.