Eaton QS20N11S85CU Marine Duty Encapsulated Transformer - UL
Part Number: QS20N11S85CU
Quick Summary
Eaton QS20N11S85CU marine duty encapsulated transformer is designed to provide compact, reliable power isolation for marine and industrial systems. Engineers often contend with moisture ingress, space constraints, and vibration in harsh environments, which can compromise safety and uptime. UL Listed certification and a NEMA 3R enclosure on a compact footprint deliver durable protection against dampness, dust, and weather. This design supports 240/480 V input and 120/240 V output, single-phase operation at 60 Hz, with a 0.075 kVA rating to meet small- to mid-size control loads. Its copper windings, encapsulated coil design, and weathershield enable reliable performance in marina arrays, offshore platforms, and rugged equipment rooms.
Product Information
Extended Description
QS20N11S85CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 54, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 0.075 KVA, indoor-outdoor, 3A075Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS20N11S85CU
UPC
786680031748
Product Length/Depth
4 in
Product Height
8.91 in
Product Width
4.11 in
Product Weight
7 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
54
Tap size
None
Type
Marine Duty Encapsulated Transformer
Wiring connection
3A075Q
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
0.075 kVA
Weathershield
Indoor-Outdoor
Marine duty encapsulated transformer with copper windings delivers rugged power isolation for harsh environments, reducing failure rates and maintenance costs. Feature → Business Impact → Application: The encapsulated coil design and copper windings minimize moisture ingress and vibration sensitivity, extending service life in salt-air and wet dockside installations; ideal for onboard equipment rooms and offshore gear where reliability matters. Feature → Business Impact → Application: A 0.075 kVA rating in a compact 4 in x 4.11 in footprint enables space-saving panel layouts and lower enclosure footprint, translating to cost savings and easier retrofits in retrofit projects and new builds. Feature → Business Impact → Application: Primary 240/480 V to secondary 120/240 V supply with 60 Hz operation supports flexible voltage conversion for control panels and instrumentation, improving compatibility with existing electrical systems and reducing inventory complexity. Feature → Business Impact → Application: NEMA 3R enclosure and indoor-outdoor weathershield provide weatherproof protection, simplifying outdoor installations at docks and on vessels while meeting exposure standards. Feature → Business Impact → Application: 115 °C rise rating and copper windings improve thermal resilience under continuous duty, supporting longer run times and higher-load scenarios in marine environments. Feature → Business Impact → Application: Wiring connection 3A075Q and a compact, weight-bearing design (7 lb) streamline installation, enabling faster commissioning and reduced labor costs in tight spaces.
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FAQs
The QS20N11S85CU supports surface or cabinet mounting within standard electrical panels. It features a compact footprint of 4 x 4.11 inches and a height of 8.91 inches, with a weight of about 7 pounds for easy handling. Wiring is facilitated via the 3A075Q connection, and the unit is UL Listed with a NEMA 3R enclosure, suitable for indoor-outdoor marine environments.
This transformer provides 0.075 kVA of power, with a primary voltage of 240 V or 480 V and a secondary of 120/240 V. It operates at 60 Hz in a single-phase configuration, making it suitable for small to medium control loads in shipboard and dockside installations.
Yes. It is explicitly designed for marine duty use with an encapsulated copper coil, EPM design, and a NEMA 3R enclosure. Its indoor-outdoor rating and 115 °C rise capability support vibration, moisture, and temperature conditions typical of marinas, offshore platforms, and vessel equipment rooms.
The unit is UL Listed, indicating compliance with widely recognized safety standards for electrical equipment. The NEMA 3R enclosure rating adds environmental protection for outdoor or damp locations. These certifications help simplify procurement and installation in regulated industrial environments while ensuring consistent performance in marine settings.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. The transformer’s compact form, robust enclosure, and copper windings contribute to lower maintenance needs and longer service life, reducing replacement frequency and overall lifecycle costs in demanding marine and outdoor installations.