Eaton DCU3104UPM DC Disconnect - NEMA 4, 1000VDC
Part Number: DCU3104UPM
Quick Summary
The Eaton DCU3104UPM is a heavy-duty DC disconnect designed for solar and energy storage applications. Engineers often struggle with safe isolation in outdoor enclosures while meeting 1000 VDC system requirements. Key certifications include UL 98B and NEC 690 per UL 1741, with a NEMA 4 weatherproof enclosure that withstands harsh environments. This combination delivers reliable, code-compliant isolation for PV systems, while the 200 A rating supports large arrays and fast maintenance cycles. The product’s 3-circuit configuration, compatible wire sizes, and clear labeling streamline installation, reduce field errors, and improve system availability for commercial and utility-scale projects.
Product Information
Extended Description
DCU3104UPM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 4, Painted 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 4, 3, Non-fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3104UPM
UPC
786685625638
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 4
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 4
Enclosure material
Painted galvanized steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature: 200 A amperage rating across three circuits with a non-fusible design. Business Impact: Provides safe, code-compliant isolation for solar PV circuits, reducing exposure to live components and improving maintenance efficiency. Application: Ideal for solar photovoltaic installations in industrial and commercial facilities. Feature: NEMA 4 weatherproof enclosure in painted galvanized steel. Business Impact: Weatherproof protection minimizes corrosion and enclosure compromise in outdoor environments, extending service life. Application: Outdoor rooftops, carports, and ground-mount arrays. Feature: Wiring flexibility with LC, SR, and EG main lug configurations (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: Streamlines site wiring, enables pre-assembly, and reduces field termination time. Application: Large feeders and control wiring for PV installations. Feature: System voltage rating of 1000 VDC. Business Impact: Ensures compatibility with modern PV and storage inverters while maintaining safety margins. Application: Solar + storage systems up to 1000 VDC. Feature: Compact overall footprint with robust enclosure and 70 lb weight. Business Impact: Easier handling, mounting, and integration into various racking or cabinet configurations. Application: Industrial and commercial solar deployments with space constraints. Feature: 200 A, 3 circuits, non-fusible protection, designed for DC photovoltaic applications. Business Impact: Provides reliable isolation for high-current PV circuits while supporting regulatory compliance and reduced maintenance costs. Application: DC PV applications across rooftop and utility-scale projects.
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FAQs
The DCU3104UPM supports three circuits with LC, SR, and EG wiring options: LC in 300 kcmil-#6 out 300 kcmil-#6; SR in 300 kcmil-#6 out 300 kcmil-#6; EG in #4-#14 AWG in and 1/0-#14 out. Use proper torque and termination hardware, follow NEC 690 guidelines, and label each circuit for safe maintenance.
It carries UL 98B and NEC 690 per UL 1741, with a NEMA 4 weatherproof enclosure, suitable for outdoor and harsh environments. The unit is non-fusible and rated for up to 1000 VDC, supporting PV and storage applications with robust safety compliance.
Yes. The device is rated for 1000 VDC system voltage and 1000 VDC maximum, making it compatible with high-voltage PV arrays and storage configurations while maintaining safety and isolation integrity.
Dimensions are 35.38 in L, 24.46 in W, 11.63 in H with a 70 lb weight. The enclosure is NEMA 4 and made of painted galvanized steel, designed for outdoor mounting on compatible frames or cabinets. Plan for adequate clearance around the enclosure for service access and cable entry.
Warranty follows Eaton Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This supports post-installation support, parts availability, and responsive technical assistance for field maintenance.