Eaton DCU2105UWM Heavy Duty DC Disconnect - NEMA 4X
Part Number: DCU2105UWM
Quick Summary
Eaton DCU2105UWM Heavy Duty DC Disconnect provides safe isolation for solar PV systems up to 1000 VDC. This solution addresses the critical need for a rugged, reliable switch that stands up to outdoor exposure and rapid maintenance workflows. UL Listed certification and a NEMA 4X-rated enclosure support durable outdoor operation, while the 304 stainless steel construction resists corrosion in harsh environments. Designed for solar PV applications, the unit also supports scalable DC PV layouts with two circuits and a 400 A rating, offering important business value in reliability, safety, and ease of installation. For teams balancing HSE compliance with total cost of ownership, this disconnect aligns with industry best practices and long-term performance goals.
Product Information
Extended Description
DCU2105UWM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, Grade 304 stainless steel, Non-fusible, Max:1000 Vdc, NEMA 4X, 2, Non-fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2105UWM
UPC
786685866192
Product Length/Depth
12.43 in
Product Height
57.47 in
Product Width
24.12 in
Product Weight
128 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
2
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: Heavy-duty construction using 304 stainless steel for durability in corrosive or coastal environments. Benefit: Extends service life and reduces replacement costs in outdoor PV installations, improving uptime. Application: Suitable for solar arrays where environmental exposure is a concern, such as outdoor PV fields or rooftop systems. Feature: Non-fusible DC switching with a 400 A amperage rating across two circuits. Benefit: Provides robust, safe isolation without fusible links, lowering fault propagation risk and simplifying maintenance. Application: Ideal for utility-scale and commercial solar projects requiring reliable DC isolation. Feature: NEMA 4X enclosure rating and UL Listed certification. Benefit: Delivers weather resistance and safety compliance, enabling code-ready installation in harsh outdoor sites. Application: Outdoor PV equipment bays, racking houses, and field installations. Feature: Rated up to 1000 VDC with 1000 V system voltage and a heavy-duty switch design. Benefit: Supports high-voltage PV configurations with proven fault isolation and quick servicing. Application: DC photovoltaic applications where high voltage and reliability are critical. Feature: Enclosure dimensions and weight (12.43 in depth, 24.12 in width, 57.47 in height, 128 lb). Benefit: Facilitates planning and space fitting in electrical rooms or outdoor enclosures, with clear mounting references. Application: Facilities with strict space planning and robust enclosure requirements. Feature: Two-circuit configuration and non-fusible fuse configuration. Benefit: Flexible layout options and straightforward integration with existing PV wiring schemes. Application: PV system feeders that need clean, non-fusible operation for safe energy isolation. Insight: The DCU2105UWM is designed to integrate with Eaton’s broader DC photovoltaic protection strategy, supporting fast field service and predictable lifecycle performance for solar projects of varying scales.
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FAQs
Plan for the unit’s footprint (12.43 in depth × 24.12 in width × 57.47 in height) and weight (128 lb) within an outdoor or secured electrical area. Ensure mounting surfaces are rigid and able to support the enclosure, provide proper clearance for service access, and integrate with existing DC components designed for 1000 VDC systems. Use compatible lugs and bus connections per Eaton specifications and confirm UL Listed compliance for environmental protection.
The DCU2105UWM is a non-fusible DC disconnect rated for 400 A across 2 circuits, with a maximum voltage of 1000 VDC. It is intended for DC photovoltaic applications and provides safe isolation for high-voltage PV strings. The enclosure is NEMA 4X rated and constructed from 304 stainless steel, supporting outdoor use with UL Listed certification.
Yes. The DCU2105UWM is UL Listed and features a NEMA 4X enclosure made of 304 stainless steel, designed for rugged outdoor environments typical of solar installations. This combination supports safer operation, easier compliance with electrical codes, and reduced risk of environmental damage in outdoor PV sites.
Its non-fusible design provides clear isolation without fault-clearing requirements, while the 400 A rating and two-circuit configuration accommodate sizable PV strings. The 1000 VDC system voltage capability supports high-voltage PV hardware, and the stainless steel, weather-resistant enclosure enhances long-term reliability in outdoor locations.
With a robust 304 stainless steel build and UL Listed protection, maintenance intervals can be extended due to enhanced corrosion resistance. The non-fusible design reduces maintenance complexity, and the unit’s durability translates to lower replacement costs and downtime, improving total cost of ownership for solar projects.