Eaton QS44D11S10CU Marine Duty Encapsulated Transformer - UL Listed
Part Number: QS44D11S10CU
Quick Summary
Eaton QS44D11S10CU is a marine duty encapsulated transformer that provides 120/240 V from 440 V for shipboard and offshore power systems. Engineers struggle with reliable, compact power conversion in corrosive, damp marine spaces. UL Listed certification, NEMA 3R enclosure, and copper windings enhance safety and reliability in harsh environments. With its 10 kVA rating, single-phase 60 Hz operation, 440 V primary and 120/240 V secondary, it offers flexible tap options for load balancing plus fast on-site replacement. Copper windings, EPM design, and a rugged NEMA 3R enclosure support long service in extreme temperatures up to 115 °C rise. Designed for ease of installation, the 16L10Q wiring connection and two taps accelerate commissioning and future capacity adjustments for marine power distribution on ships.
Product Information
Extended Description
QS44D11S10CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 179, 60 Hz, single-phase, 440 V, 120/240 V, 2 at +2.5% FCAN, 2 at -2.5% FCBN, 115 °C rise, 10 KVA, indoor-outdoor, 16L10Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS44D11S10CU
UPC
786680060670
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
220 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
2 at +2.5% FCAN, 2 at -2.5% FCBN
Type
Marine Duty Encapsulated Transformer
Wiring connection
16L10Q
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
440 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
10 kVA
Weathershield
Indoor-Outdoor
Copper windings deliver improved current carrying capacity and lower impedance, translating to higher efficiency and cooler operation under load. This reduces energy losses and extends transformer life, lowering maintenance costs in active marine networks. The marine duty encapsulated construction with EPM and a NEMA 3R enclosure provides rugged moisture resistance, enabling indoor-outdoor installation on decks or machinery rooms and saving space while reducing enclosure corrosion. Dual taps at +2.5% FCAN and -2.5% FCBN support precise voltage balancing as loads shift, improving regulator performance and protecting sensitive equipment. A 10 kVA rating at 60 Hz makes QS44D11S10CU suitable for a range of shipboard applications from control cabinets to distribution panels, with straightforward field adjustments for capacity planning. The 16L10Q wiring connection simplifies harness design, while UL Listed safety supports regulatory compliance and procurement workflows. In marine power distribution, reliability, ease of installation, and a compact footprint translate into lower total cost of ownership and faster uptime.
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FAQs
QS44D11S10CU is designed for easy integration into standard shipboard control rooms and outdoor spaces. It uses a 16L10Q wiring connection and provides dual taps at +2.5% FCAN and -2.5% FCBN to balance loads. With a NEMA 3R enclosure and indoor-outdoor suitability, it fits existing marine panels while resisting humidity, salt spray, and vibration, reducing commissioning time and risk.
The transformer features a 440 V primary voltage and a 120/240 V secondary voltage. It is a single-phase device rated at 10 kVA and operates at 60 Hz. This combination supports typical shipboard loads that require 120/240 V from a higher 440 V supply, enabling scalable distribution across onboard equipment.
Yes. The unit is engineered for marine duty with copper windings, EPM design, and a NEMA 3R enclosure that provides robust moisture and corrosion resistance. UL Listed certification further confirms safety compliance for demanding offshore and on-board applications, while indoor-outdoor ratings enable flexible installation on decks, machinery rooms, and control spaces.
QS44D11S10CU is UL Listed, signaling adherence to recognized safety standards for electrical equipment. The NEMA 3R enclosure offers protection suitable for indoor-outdoor use, and the marine-duty encapsulated design aligns with industry practices for harsh environments. These certifications simplify procurement, compliance audits, and service planning for regulated marine facilities and fleets.
Expect reduced downtime due to robust marine-grade construction and high reliability, with maintenance needs limited to routine inspections and connection checks. The copper windings improve efficiency and heat management, while the dual taps support load balancing without swapping components. These factors contribute to lower life-cycle costs and improved uptime for critical marine power distribution.