Eaton DCU1105UPM DC disconnect - UL Listed, NEMA 4
Part Number: DCU1105UPM
Quick Summary
Eaton DCU1105UPM DC disconnect provides a rugged, non-fusible DC switching solution for solar PV systems. Field installations often contend with tight spaces, heat buildup, and regulatory compliance hurdles that complicate safe isolation. This unit carries UL Listed certification and a NEMA 4 enclosure built from painted galvanized steel, offering reliable outdoor performance and corrosion resistance for harsh environments. With a 1000 VDC system voltage rating and 400 A amperage capacity, it supports large PV strings while maintaining compact footprint. By aligning with standard protection schemes and installation practices, it delivers improved uptime, safer maintenance, and reduced total cost of ownership for utility-scale and commercial solar projects.
Product Information
Extended Description
DCU1105UPM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, Painted steel, Non-fusible, Max:1000 Vdc, NEMA 4, 1, Non-fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1105UPM
UPC
786685866147
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 4
Protection
Non-fusible
Application
Solar
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: Heavy-duty DC disconnect in a non-fusible design. Benefit: Safe, rapid isolation of a DC photovoltaic circuit reduces risk during maintenance and fault clearing, enabling faster commissioning in solar installations. Application: Ideal for single-circuit PV disconnects on rooftop or ground-mounted arrays. Feature: 400 A amperage rating with 1 circuit and 1000 VDC maximum. Benefit: Supports large current PV strings and higher voltage deployments without overrating components, improving system efficiency and reducing component count. Application: Suitable for mid- to large-scale PV projects where space is at a premium. Feature: NEMA 4 enclosure and painted galvanized steel construction. Benefit: Weatherproof, dust-tight protection that withstands outdoor exposure and washdown environments, ensuring long service life with minimal maintenance. Application: Outdoor installations and harsh environments common in commercial solar sites. Feature: UL Listed certification. Benefit: Demonstrates compliance with recognized safety standards, easing procurement and installer validation, while aligning with corporate risk-management goals. Application: Regulatory-compliant installations across North America. Feature: General specifications including dimensions and weight. Benefit: Clear footprint and mounting planning support, reducing installation surprises and enabling accurate enclosure siting. Application: Pre-install surveys for rooftop, carport, or ground-mounted systems. Feature: System compatibility with DC photovoltaic applications. Benefit: Seamless integration with typical PV protection schemes and existing Eaton or third-party components, simplifying project design and maintenance planning. Application: Solar power systems requiring robust, code-compliant DC isolation.
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FAQs
Plan for a single 400 A, 1000 VDC circuit layout with correct mounting clearance for a NEMA 4 enclosure. Ensure suitable external wiring access, secure fasteners, and adherence to UL safety requirements. Verify compatibility with existing PV protection gear and confirm outdoor installation suitability.
The 1000 VDC rating sets voltage clearance and insulation requirements across components, reducing arc flash risk and enabling longer DC runs. Design considerations include proper conductor sizing, protective enclosures, and clear labeling to meet code and ensure safe operation under fault conditions.
Yes. The unit features a NEMA 4 enclosure and painted galvanized steel construction, delivering weather resistance and corrosion protection suitable for outdoor solar installations, dust exposure, and washed-down environments. UL Listed certification further reinforces suitability for demanding field conditions.
The DCU1105UPM is UL Listed and rated for non-fusible DC protection with a NEMA 4 enclosure. It supports solar PV applications up to 1000 VDC and 400 A, ensuring it meets safety, accessibility, and environmental protection requirements for commercial and utility-scale installations.
With a rugged, non-fusible design and durable enclosure, maintenance intervals are extended and downtime minimized. The UL Listing and robust protection help reduce warranty and compliance risks, delivering lower lifecycle costs and predictable ROI in solar projects with frequent outdoor exposure.