Eaton DCU3104UWM DC disconnect - 1000 VDC, NEMA 4X
Part Number: DCU3104UWM
Quick Summary
DCU3104UWM is a heavy-duty DC disconnect designed for solar PV systems, delivering safe isolation and reliable performance up to 1000 VDC. Engineers often struggle with corrosion, weatherproofing, and wiring integration in outdoor enclosures. This unit features a 304 stainless steel, NEMA 4X enclosure that resists harsh environments and simplifies field installation. Certifications include UL 98B and NEC 690 per UL 1741, with NEMA 4X protection providing durable operation in demanding climates. The device is non-fusible and rated for 200 A across three circuits, aligning with common solar array configurations. By combining rugged construction with standardized specifications, it supports efficient procurement, reduced downtime, and long-term maintenance predictability for solar projects.
Product Information
Extended Description
DCU3104UWM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 4X, 304 stainless steel, Non-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, Non-fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3104UWM
UPC
786685625645
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
UL 98B NEC 690 per UL 1741
Type
DC disconnect/ungrounded system
Amperage Rating
200 A
Number of circuits
3
Maximum voltage
1000 VDC
NEMA rating
NEMA 4X
Protection
Non-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
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature a 200 A amperage rating with three circuits provides scalable isolation for solar strings, reducing the need for additional switchgear and enabling faster installation. Business impact: improved system uptime and modularity; Application: mid-to-large solar installations and battery storage arrays. Feature a non-fusible design that minimizes arc flash risk during service and simplifies maintenance, delivering safer field operations and lower lifecycle costs. Business impact: enhanced safety compliance and easier operator training; Application: utility-scale and commercial PV deployments. Feature a 304 stainless steel enclosure with NEMA 4X rating delivers robust outdoor protection against corrosion, dust, and water ingress. Business impact: lower enclosure maintenance and longer service intervals; Application: outdoor racking, portable PV stations, and harsh environments. Feature main lug configurations LC, SR, and EG support flexible wiring banks: LC supports large conductors; SR allows through-feed; EG handles low-voltage leads. Business impact: reduces field re-termination and accelerates commissioning; Application: scalable solar wiring topologies. Feature a 1000 VDC system voltage and 200 A rating ensure compatibility with modern PV arrays and energy storage systems, while remaining non-fusible for straightforward replacement. Business impact: higher system compatibility and lower total cost of ownership; Application: PV + storage integration. Certification and compliance alignment with UL 98B and NEC 690 per UL 1741 give procurement teams confidence in meeting industry standards and project spec requirements, supporting faster approvals and reduced redlines. Business impact: smoother procurement cycles and reduced risk; Application: regulated solar projects.
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FAQs
The DCU3104UWM is designed for solar photovoltaic (PV) applications and energy storage integrations. It supports 200 A across three circuits with a maximum of 1000 VDC, using LC, SR, and EG wire terminations to accommodate large conductors or control leads. This makes it suitable for mid-size solar farms, commercial rooftops, and utility-scale systems seeking rugged, non-fusible DC isolation.
The DCU3104UWM complies with UL 98B for enclosure safety and NEC 690 as applied through UL 1741 for PV systems. In addition, it carries a NEMA 4X enclosure rating, ensuring weatherproof operation in outdoor environments. These certifications help ensure regulatory alignment, reduce project risk, and streamline approvals for solar installations.
LC supports large-lug conductors (In 300 kcmil-#6 out 300 kcmil-#6), SR accommodates through-feed connections (in 300 kcmil-#6 out 300 kcmil-#6), and EG handles smaller control or signal wires (in #4-#14 AWG out 1/0-#14). This flexible wiring enables efficient field terminations, reduces rework, and supports diverse PV layouts without adding extra bus work.
Eaton provides a warranty under policy 25-000, covering one year from installation or eighteen months from shipment, whichever occurs first. This warranty supports maintenance planning and cost-of-ownership considerations, and Eaton’s service ecosystem can assist with replacement parts, spare inventories, and technical support during the product lifecycle.
Yes. The 304 stainless steel enclosure with a NEMA 4X rating is designed for outdoor, dust, and water exposure, providing corrosion resistance and reliable operation in harsh climates. The 1000 VDC rating and non-fusible design further support safe, long-term PV system isolation without frequent maintenance or enclosure compromises.