Eaton DCU1105UWM DC Disconnect - NEMA 4X, 1000 VDC
Part Number: DCU1105UWM
Quick Summary
DC Disconnect capability is built into the Eaton DCU1105UWM to safely isolate a solar PV circuit. In real-world installations, engineers contend with outdoor exposure, corrosion, and maintenance demands that erode uptime and increase risk. UL Listed protection and a NEMA 4X enclosure pair with 304 stainless steel construction to deliver lasting reliability in harsh environments. The unit’s single 400 A, non-fusible circuit supports scalable solar applications, while its rugged housing simplifies installation and reduces lifecycle costs. This solution integrates smoothly with existing protection schemes, delivering tangible business value through safer operation and predictable performance for industrial PV protection.
Product Information
Extended Description
DCU1105UWM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, Grade 304 stainless steel, Non-fusible, Max:1000 Vdc, NEMA 4X, 1, Non-fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1105UWM
UPC
786685866154
Product Length/Depth
12.43 in
Product Height
57.47 in
Product Width
24.12 in
Product Weight
116.5 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
Maximum voltage
1000 VDC
NEMA rating
NEMA 4X
Protection
Non-fusible
Application
Solar
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature: 400 A amperage rating → Business impact: Enables handling large DC strings with a single disconnect, reducing wiring complexity and potential fault propagation → Application: Industrial solar PV systems requiring robust current isolation. Feature: 1 circuit, non-fusible configuration → Business impact: Simplifies maintenance and fault diagnosis by keeping the disconnect straightforward and easy to test → Application: Stand-alone DC isolation in solar installations. Feature: Maximum voltage of 1000 VDC → Business impact: Supports utility-scale and higher-voltage PV setups without device substitution → Application: 1000 VDC solar arrays in manufacturing facilities. Feature: NEMA 4X enclosure with 304 stainless steel → Business impact: Delivers superior outdoor protection against moisture, corrosion, and dust, extending service life and reducing enclosure maintenance → Application: Outdoor installations in harsh environments. Feature: UL Listed certification → Business impact: Ensures regulatory compliance and smoother procurement with trusted quality standards → Application: Projects requiring recognized safety qualifications. Feature: Heavy duty switch type → Business impact: Enhances reliability and operability under frequent on/off cycling in demanding environments → Application: Repeated isolation in solar protection schemes.
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FAQs
The DCU1105UWM is designed for DC photovoltaic applications with a 1000 VDC maximum system voltage and a 400 A amperage rating. It provides a single non-fusible circuit in a heavy-duty, UL Listed enclosure. The unit is suitable for outdoor solar installations, including industrial PV systems, where a rugged DC disconnect is required.
For outdoor deployments, the DCU1105UWM uses a NEMA 4X enclosure crafted from 304 stainless steel, delivering corrosion and weather resistance. Its dimensions and weight support stable mounting in exposed locations, while the non-fusible design simplifies wiring and reduces maintenance complexity in harsh environments.
Key differentiators include a 400 A rating for a single circuit, 1000 VDC maximum, non-fusible protection, and a heavy-duty switch in a UL Listed, stainless-steel NEMA 4X enclosure. It is purpose-built for solar PV protection, ensuring reliable isolation in both industrial and utility-scale installations.
The DCU1105UWM carries UL Listed certification and a NEMA 4X enclosure rating, confirming safety and weather protection for outdoor use. These attributes support compliance in many regulatory environments and facilitate procurement for robust solar protection in harsh conditions.
With a corrosion-resistant 304 stainless steel enclosure and a non-fusible design, the DCU1105UWM offers low maintenance needs and high reliability. The UL Listed rating and rugged construction reduce downtime risk, contributing to a favorable total cost of ownership over the system’s life, especially in outdoor solar installations.