Eaton DCU3104FRM DC Disconnect - NEMA 3R Fusible
Part Number: DCU3104FRM
Quick Summary
Eaton DCU3104FRM is a heavy-duty DC disconnect designed for solar installations and other 1000 VDC systems. Facility engineers often struggle to find a safe, code-compliant disconnect that accommodates large conductors while surviving outdoor exposure. This model carries UL 98B and NEC 690 per UL 1741 requirements, with a durable NEMA 3R enclosure for rugged outdoor service. With a 200 A rating across 3 circuits and the ability to accept Class R fuses, it delivers reliable protection for solar PV arrays. The solution supports critical project timelines by simplifying installation, reducing maintenance, and ensuring compliance across demanding DC solar applications.
Product Information
Extended Description
DCU3104FRM Eaton: Eaton Heavy duty, 200 A, NEMA 3R, 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 3R, 3, Fusible, System:1000 Vdc, accepts class R fuses
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3104FRM
UPC
786685625744
Product Length/Depth
11.63 in
Product Height
35.38 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 3R
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 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Feature: 200 A amperage rating and 3 circuits; Business Impact: Provides robust protection for multi-string solar DC circuits, reducing fault impact and downtime; Application: Solar photovoltaic arrays and high-current DC power distribution. Feature: 1000 VDC system voltage capability; Business Impact: Enables safe interruption of high-voltage DC power without risk to personnel or equipment; Application: Utility-scale and commercial PV installations. Feature: Fusible protection and compatibility with Class R fuses; Business Impact: Flexible protection options and longer fuse life with proper protection coordination; Application: Configurable protection for diverse DC load profiles. Feature: NEMA 3R outdoor enclosure with painted galvanized steel; Business Impact: Weather-resistant housing minimizes corrosion risk and maintenance costs; Application: Outdoor wiring centers and rooftop installations. Feature: UL 98B and NEC 690 per UL 1741 certifications; Business Impact: Streamlines regulatory approvals and site inspections; Application: Solar code compliance for rapid project onboarding. Feature: Cable and conductor versatility across LC, SR, and EG terminals; Business Impact: Reduces inventory needs and simplifies field wiring; Application: Large and small-diameter DC conductors.
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FAQs
The DCU3104FRM is designed for straightforward wiring integration with standard DC conductors, supports Class R fuses, and complies with NEC 690 for DC PV applications. It accommodates large feeder sizes, simplifies field wiring through clearly defined lug configurations, and provides predictable protection in outdoor installations.
The DCU3104FRM carries UL 98B and NEC 690 requirements as per UL 1741, ensuring safe operation for solar DC disconnects. Its NEMA 3R enclosure rating provides outdoor protection against weather, making it suitable for rooftop and exposed installations. These certifications help expedite inspections and align with common industry requirements for solar power systems.
Yes. The unitās NEMA 3R enclosure, 1000 VDC rating, and fusible protection are specifically designed for outdoor solar PV applications and battery-backed DC circuits. The robust enclosure and high-current capability help maintain system reliability in harsh environments while meeting stringent safety standards.
Key benefits include reduced field wiring complexity due to multiple conductor options, flexible fuse configuration with Class R compatibility, and a rugged outdoor enclosure that minimizes maintenance. These features translate to faster installation, fewer retrofit needs, lower downtime, and improved lifecycle cost efficiency for solar projects.
By meeting UL 98B and NEC 690 per UL 1741, the DCU3104FRM ensures code-compliant disconnection of high-voltage DC power. The 200 A, 3-circuit design supports reliable protection for solar arrays, while the NEMA 3R enclosure provides durable outdoor protection. This combination reduces inspection delays and improves uptime for critical solar power infrastructure.