Eaton DCU1065URM Heavy Duty DC Disconnect - NEMA 3R
Part Number: DCU1065URM
Quick Summary
Eaton DCU1065URM is a heavy-duty DC disconnect designed for solar PV systems. This unit provides safe, reliable isolation of 600 VDC circuits, protecting both people and equipment in outdoor or harsh environments. For engineers facing field installation challenges, its NEMA 3R enclosure and painted galvanized steel construction deliver weather resistance and long service life, while UL Listed certification confirms compliance. The combination of 400 A capacity, ungrounded configuration, and a single circuit simplifies wiring and reduces installation time. With support for 600 VDC per pole, it aligns well with modern solar array designs and DC charging stations, delivering measurable business value through improved safety, reduced downtime, and easier maintenance.
Product Information
Extended Description
DCU1065URM Eaton: Eaton heavy duty DC disconnect,DC disconnect/ungrounded system,400A,NEMA 3R,Painted galvanized steel,Non-fusible,Ungrounded,600 Vdc,1,DC Photovoltaic Applications
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1065URM
UPC
786685865812
Product Length/Depth
12.42 in
Product Height
57.47 in
Product Width
24.12 in
Product Weight
110 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 Listed
Type
DC disconnect/ungrounded system
Amperage Rating
400 A
Number of circuits
1
Ground
Ungrounded
Maximum voltage
600 VDC
NEMA rating
NEMA 3R
Protection
Non-fusible
Application
Solar
System voltage
600 VDC per pole
Voltage rating
600 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. The DCU1065URM delivers a 400 A amperage rating, enabling a single, robust DC disconnect for large solar arrays, which translates to reduced wiring complexity and safer isolation in high-current PV circuits. This supports improved installation efficiency and lower risk of overheating or nuisance trips in outdoor deployments, especially when combined with a 600 VDC per pole system. Feature → Application → Solar PV. The NEMA 3R, painted galvanized steel enclosure provides weather-resistance for outdoor rooftop and ground-mounted installations, reducing corrosion concerns and maintenance costs over the system life. This enclosure design ensures dependable performance in sun, rain, and temperature swings, helping projects stay on schedule and within budget. Feature → Compliance → UL Listed. The non-fusible, ungrounded design simplifies fault isolation and protects personnel during service, while UL Listed certification offers regulatory assurance for utility-scale and distributed solar installations. Feature → Installation → Compatibility. With 1 circuit and a non-fusible configuration, wiring is straightforward, minimizing field wiring errors and enabling faster commissioning. Feature → Performance → Reliability. The compact 12.42 in depth, 24.12 in width, and 57.47 in height footprint, along with 110 lb weight, supports standard rack or enclosure integration and reduces remote handling risk during installation. This makes the DCU1065URM a practical choice for DC PV applications requiring robust outdoor protection and straightforward maintenance.
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FAQs
The DCU1065URM is designed as a 400 A, 1-pole (per unit) non-fusible disconnect with an Ungrounded configuration for DC PV applications. It uses a NEMA 3R enclosure of painted galvanized steel, which suits outdoor installations on rooftops or ground-mounted sites. When wiring, plan for a single circuit per unit, 600 VDC per pole, and ensure clearances per local code. Proper torque on lugs and secure conduit entry maintain mechanical integrity and electrical performance in harsh environments.
Key ratings include 400 A maximum amperage, 600 VDC maximum system voltage per pole, and NEMA 3R enclosure with non-fusible protection. Ungrounded design simplifies fault isolation while maintaining safe operation. These characteristics support high-current solar DC networks and improve system safety, reducing risk during maintenance. The UL Listed certification further reinforces reliability and regulatory compliance for utility-scale and commercial PV installations.
Yes. The NEMA 3R enclosure and painted galvanized steel construction are specifically chosen for outdoor environments, including rooftops and ground-mounted PV installations. With 400 A capacity and 600 VDC ratings, it handles large DC distributions common in commercial and utility-scale projects. The ungrounded, non-fusible design supports straightforward safety isolation, while compact dimensions facilitate integration with existing racking and electrical rooms.
The DCU1065URM is UL Listed, indicating compliance with recognized safety standards for electrical components. Its NEMA 3R enclosure meets outdoor protection requirements, and the unit is designed for 600 VDC DC PV applications. UL listing assists with project documentation, procurement approvals, and meeting utility or code-based safety requirements, reducing the risk of non-compliance during system commissioning.
By delivering reliable outdoor protection in a robust galvanized steel enclosure, the DCU1065URM minimizes corrosion-related maintenance and field service downtime. Its 400 A rating supports centralized DC-disconnect strategies that reduce wiring complexity, enabling faster commissioning and easier fault isolation. Over the system life, these factors translate to lower maintenance costs, improved uptime, and a favorable total cost of ownership for solar DC distributions.