Eaton DCU3104FPM DC Disconnect - NEMA 4, 1000 VDC, Fusible
Part Number: DCU3104FPM
Quick Summary
The Eaton DCU3104FPM is a heavy-duty DC disconnect for solar and other 1000 VDC DC link protection. Engineers often struggle with reliable outdoor protection, safe isolation, and easy field maintenance in harsh environments. This unit delivers a weatherproof NEMA 4 enclosure in painted galvanized steel, with a robust fusible design to minimize fault duration and prevent backfeed. It carries NEC 690 PV requirements with UL 1741 and UL 98B certifications, ensuring code-ready performance in critical deployments. Designed for 1000 VDC systems, it supports three circuits and offers scalable protection for solar, energy storage, and industrial DC distributions, delivering safety, compliance, and streamlined installation as core business value.
Product Information
Extended Description
DCU3104FPM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 4, Painted 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 4, 3, Fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3104FPM
UPC
786685625751
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
Ground
Ungrounded
Maximum voltage
1000 VDC
NEMA rating
NEMA 4
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 4
Enclosure material
Painted galvanized steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - DCU3104FPM
Selling Policy 25-000 - Distribution and Control Products and Services
Feature is 200 A amperage rating with three circuits, fusible protection, and a heavy-duty DC disconnect. Business Impact: Supports high-current solar and DC distribution with reliable fault isolation, reducing downtime and enhancing system safety. Application: Ideal for solar PV arrays and industrial DC links where precise protection and easy maintenance are required. Feature is NEMA 4 enclosure with painted galvanized steel. Business Impact: Weatherproof resilience for outdoor and demanding environments, lowering corrosion risk and service calls. Application: Outdoor substations, rooftop PV installations, and harsh industrial sites. Feature is flexible main lug wiring options (LC, SR, EG) including 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). Business Impact: Simplifies field wiring across diverse conductor types, speeding installation and reducing error. Application: Solar string combiner boxes, battery storage systems, and DC distribution panels. Feature is 1000 VDC system voltage and UL/NEC compliant ratings. Business Impact: Ensures regulatory compliance and safe operation across high-voltage DC installations. Application: Utility-scale and industrial DC networks with strict safety requirements. Feature is NEMA 4, fusible, heavy-duty switch type. Business Impact: Provides a robust, field-immune disconnect that minimizes maintenance and extends service life. Application: Harsh exterior environments and critical solar or storage installations.
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FAQs
Begin with proper mounting on a stable surface, observe required clearances, and connect conductors using the approved lug sizes: LC, SR, and EG configurations. Follow the 1000 VDC rating guidelines, ensure correct fuse selection, and verify enclosure sealing for the expected environmental conditions. Use manufacturer wiring diagrams to prevent incorrect terminations and to maintain compliance with NEC 690 and UL 1741.
The unit is rated for 200 A with three circuits. Main lug configurations accommodate 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 and voltage rating are 1000 VDC, with fusible protection included in the design.
Yes. The enclosure is NEMA 4 rated and constructed from painted galvanized steel, providing weather resistance for outdoor and demanding indoor environments. This protects internal components from dust, water ingress, and corrosive elements, helping maintain performance and reducing maintenance needs.
DCU3104FPM complies with NEC 690 for PV systems and carries UL 1741 and UL 98B certifications, ensuring safe operation, proper isolation, and reliable fuse protection in solar and DC distribution applications. These certifications support code compliance, safety audits, and qualified installation practices.
Warranty terms follow Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. Routine maintenance includes periodic inspection of the fuse elements, enclosure seals, and terminal connections, with attention to corrosion resistance and gasket integrity to sustain long-term performance.