Eaton DCU1104URM DC Disconnect for Solar - NEMA 3R
Part Number: DCU1104URM
Quick Summary
Eaton DCU1104URM heavy duty DC disconnect isolates solar DC circuits with reliability and safety in outdoor installations. This solution addresses the frequent challenge of safely isolating PV strings during maintenance while withstanding harsh environments. Certifications such as UL 98B, NEC 690 per UL 1741, and a NEMA 3R enclosure provide a strong compliance foundation. With a 1000 VDC system rating and non-fusible design, this unit helps you simplify code compliance, reduce downtime, and improve overall system safety. For engineers and procurement teams, the DCU1104URM also offers clear installation benefits and long-term operational value for solar projects.
Product Information
Extended Description
DCU1104URM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 3R, 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 3R, 1, Non-fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1104URM
UPC
786685625546
Product Length/Depth
11.63 in
Product Height
35.38 in
Product Width
16.54 in
Product Weight
45 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
1
Maximum voltage
1000 VDC
NEMA rating
NEMA 3R
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 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature → Business Impact → Application: Heavy duty 200 A, non-fusible DC disconnect rated to 1000 VDC delivers safe isolation with minimal arc risk, supporting efficient maintenance and rapid fault isolation in solar arrays. This improves uptime and reduces risk on remote sites where quick, dependable shutoffs are critical. Application: PV string isolation in outdoor solar deployments, service points, and DC distribution trains. Feature → Enclosure is NEMA 3R with galvanized steel protection; weather-resistant housing reduces corrosion and prolongs service life in outdoor environments. Business Impact: lower maintenance costs, longer intervals between service, and robust protection against environmental elements. Application: Outdoor solar PV installations, roof-mounted or ground-mounted arrays. Feature → Main lug configurations (LC, SR, EG) support In 300 kcmil-#6, SR 300 kcmil-#6, EG #4-#14 AWG to 1/0-#14; compatibility with diverse DC cables simplifies pull schedule. Business Impact: reduced inventory complexity and faster commissioning. Application: New installations and retrofit integrations with varied conductor sizes. Feature → Certifications and warranty (UL 98B, NEC 690 per UL 1741; 1-year Eaton policy) reinforce compliance and support. Business Impact: predictable regulatory alignment and risk mitigation; streamlined procurement with warranty coverage. Application: Solar buildouts requiring UL/NEC adherence and reliable post-sale support.
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FAQs
DCU1104URM is designed for 1 circuit, 200 A DC isolation with a NEMA 3R outdoor enclosure. It accepts LC wiring up to 300 kcmil-#6, SR up to 300 kcmil-#6, and EG configurations from #4-#14 AWG to 1/0-#14. This makes retrofit and new installs straightforward, aligning with common PV string and DC distribution layouts.
Key specs include a 200 A amperage rating, maximum voltage of 1000 VDC, non-fusible protection, 1 circuit, and NEMA 3R enclosure. Certifications include UL 98B and NEC 690 per UL 1741, ensuring regulatory compliance for solar DC isolation in outdoor environments.
This unit is ideal for outdoor solar PV installations, including rooftop and ground-mounted systems, where a robust, non-fusible DC disconnect is required for safe isolation of DC circuits up to 1000 V. It supports solar-specific wiring schemes and provides reliable service in harsh outdoor conditions.
DCU1104URM carries UL 98B and NEC 690 per UL 1741 certifications, aligning with recognized safety and performance standards for DC power distribution in solar applications. These certifications help meet regulatory requirements and simplify site acceptance testing and inspections.
With a rugged NEMA 3R enclosure and 200 A rating, maintenance intervals are typically tied to environmental exposure and system load rather than component wear. Eaton’s 1-year warranty reinforces initial reliability, while reduced downtime from fast, safe isolation translates to tangible ROI in ongoing solar operations.