Eaton DCU3104FWM DC Disconnect - NEMA 4X, 1000 VDC
Part Number: DCU3104FWM
Quick Summary
Eaton heavy duty DC disconnect is designed to safely isolate solar DC circuits and protect technicians during maintenance. This solution addresses the real-world challenge of safely breaking high voltage DC paths in outdoor PV installations without compromising enclosure integrity. Certifications include NEC 690 per UL 1741 and UL 98B, with a rugged NEMA 4X, 304 stainless steel enclosure for harsh environments. For project stakeholders, this means reliable protection, reduced downtime, and long-term compliance across a 1000 VDC, three-circuit system. Integrating this unit with existing solar arrays minimizes wiring challenges and simplifies maintenance while delivering strong safety margins and lifecycle cost benefits.
Product Information
Extended Description
DCU3104FWM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 4X, Grade 304 stainless steel, Fusible, LC: In 300 MCM-#6 out 300 MCM-#6. SR: in 300 MCM-#6 out 300 MCM-#6. EG: in #4-#14 AWG out 1/0-#14, Max:1000 Vdc, NEMA 4X, 3, Fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3104FWM
UPC
786685625768
Product Length/Depth
35.38 in
Product Height
11.63 in
Product Width
24.46 in
Product Weight
70 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
NEC 690 per UL 1741 UL 98B
Type
DC disconnect/ungrounded system
Amperage Rating
200 A
Number of circuits
3
Maximum voltage
1000 VDC
NEMA rating
NEMA 4X
Protection
Fusible
Application
Solar
Main lug wire size
LC: In 300 kcmil-#6 out 300 kcmil-#6. SR: in 300 kcmil-#6 out 300 kcmil-#6. EG: in #4-#14 AWG out 1/0-#14
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - DCU3104FWM
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 200 A, three circuits deliver consolidated DC isolation for solar arrays. Business impact: reduces hardware footprint and wiring complexity, enabling faster commissioning and easier service. Application: ideal for mid-size PV projects where a single, reliable disconnect simplifies safety procedures. Feature: NEMA 4X enclosure in 304 stainless steel offers weatherproof, corrosion-resistant protection. Business impact: protects critical switching gear from harsh outdoor conditions, lowering maintenance cycles. Application: outdoor rooftops, harsh industrial sites, coastal environments. Feature: Fusible protection provides fast fault clearing per NEC/UL standards. Business impact: enhances overcurrent protection and selective protection coordination, reducing arc-flash risk. Application: PV strings and DC links subject to fault conditions. Feature: Main lug options and wiring compatibility accommodate large conductors up to 300 kcmil-#6. Business impact: enables seamless integration with existing feeders and minimizes rework. Application: large PV installations and battery storage interfaces. Feature: System voltage rating of 1000 VDC supports high-efficiency DC networks. Business impact: allows longer string voltages and scalable PV systems, reducing number of disconnects needed. Application: utility-scale and large commercial PV projects. Feature: NEMA 4X enclosure, 304 stainless steel, fusible protection, and three circuits collectively meet stringent safety and regulatory criteria. Business impact: simplifies compliance documentation and long-term operation. Application: installations demanding robust environmental protection and reliable performance.
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FAQs
The DCU3104FWM supports LC main lugs for in 300 kcmil to out 300 kcmil-#6 wiring, SR lugs for in 300 kcmil-#6 out 300 kcmil-#6, and EG lugs for in #4-#14 AWG out 1/0-#14. This range enables integration with large feeders and smaller control wiring, streamlining installation and reducing the need for intermediate splices.
It provides 200 A, three circuits, and a 1000 VDC rating in a weatherproof NEMA 4X 304 stainless steel enclosure, with fusible protection. These features align with PV safety standards, simplify string-level disconnects, and support outdoor installations while helping meet NEC 690 requirements.
The unit carries NEC 690 compliance per UL 1741 and UL 98B, ensuring critical solar safety alignment. It uses a NEMA 4X enclosure for environmental protection. These certifications support project qualification, documentation, and regulatory acceptance for outdoor solar and storage systems.
Plan for a 35.38 in length, 24.46 in width, and 11.63 in height footprint with a 70 lb weight. Ensure adequate mounting space, proper ventilation for heat dissipation, and routing for 300 kcmil-#6 feeders. Outdoor use requires weatherproof enclosures and compliant cabling routing to maintain NEMA 4X integrity.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first (Sales Policy 25-000). This aligns with standard distributor terms and helps with procurement planning and long-term maintenance budgeting for solar projects.