Eaton DCU2103UWM DC Disconnect - NEMA 4X 1000VDC
Part Number: DCU2103UWM
Quick Summary
DCU2103UWM heavy-duty DC disconnect safely isolates solar DC circuits for outdoor PV systems. Engineers often struggle with corrosion, weather exposure, and complex wiring in field installations, and this unit addresses those challenges with a rugged, weatherproof design. It carries UL 98B and NEC 690 per UL 1741 certifications, along with a NEMA 4X enclosure to ensure long-term reliability in harsh environments. Built for durability and straightforward installation, this solution delivers compliant isolation for solar projects while maintaining strong business value through reduced maintenance and easier procurement of compatible components.
Product Information
Extended Description
DCU2103UWM Eaton: Eaton Heavy duty DC disconnect, 100 A, NEMA 4X, Grade 304 stainless steel, Non-fusible, Ungrounded, #14-1/0 AWG lug capacity, #14-1/0 AWG solid return, 2, DC photovoltaic applications, Rating:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2103UWM
UPC
786685558103
Product Length/Depth
10.22 in
Product Height
18.95 in
Product Width
16.13 in
Product Weight
37 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
Catalog Notes
Not all configurations for ampere rating and number of circuits are available. All circuit configurations can be found in the product dimension tables.
Type
DC disconnect/ungrounded system
Amperage Rating
100A
Number of circuits
2
Ground
Ungrounded
Protection
Non-fusible
Application
Solar
Main lug wire size
#14-1/0 AWG lug capacity, #14-1/0 AWG solid return
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 → Business Impact → Application: The 100 A rating with 2 circuits provides safe, clearly defined isolation points for solar DC strings, enabling predictable maintenance cycles and faster commissioning in outdoor PV installations. This non-fusible, ungrounded design minimizes fault pathways and simplifies system topology, reducing startup risks and simplifying safety procedures in the field. Application: Solar PV sites requiring robust, code-compliant disconnects with straightforward wiring for #14-1/0 AWG lugs and solid returns, supporting rapid, reliable field integration. Feature → Business Impact → Application: NEMA 4X enclosure and 304 stainless steel construction deliver superior weather resistance and corrosion protection, lowering long-term maintenance costs and minimizing downtime in exposed environments. This translates to higher system availability and lower lifecycle costs for utility-scale or commercial solar projects. Application: Outdoor PV arrays and rooftop installations where environmental exposure is a primary concern. Feature → Business Impact → Application: Main lug wire size compatibility (#14-1/0 AWG) simplifies installation and stocking, enabling electricians to source a single disconnect for multiple string configurations. This reduces procurement complexity and on-site wiring time, improving project timelines. Application: Solar inverters and string combiners that require versatile lug options for diverse conductor bundles. Feature → Business Impact → Application: 1000 VDC voltage rating supports higher-voltage PV architectures, expanding compatibility with modern modules and inverters while preserving safety margins. Application: Utility-scale and commercial PV systems deploying advanced string configurations. Feature → Business Impact → Application: Certifications UL 98B and NEC 690 per UL 1741 ensure ongoing compliance with industry codes, supporting risk mitigation and easier regulatory audits. Application: Projects targeting stringent electrical codes and reliability standards in solar installations. Feature → Business Impact → Application: Warranty coverage of one year from installation (or 18 months from shipment) provides clear protection against defects, supporting total cost of ownership calculations and service planning. Application: Procurement planning and service budgeting for solar installations and multi-site deployments.
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FAQs
Plan for a weatherproof mounting location with appropriate clearance. The unit features a NEMA 4X enclosure in 304 stainless steel and supports #14-1/0 AWG lugs, making outdoor installation straightforward while maintaining code-compliant isolation in solar applications.
The DCU2103UWM is a 100 A, non-fusible, ungrounded disconnect rated for 1000 VDC across 2 circuits. This combination supports reliable isolation for PV strings while meeting NEC 690 requirements when used in UL 98B certified installations.
Yes. It is designed for solar PV applications with a 1000 VDC rating and 2 circuits, compatible with #14-1/0 AWG lugs for both the main conductors and solid returns. It supports ungrounded, non-fusible operation in a rugged outdoor environment.
The unit carries UL 98B and NEC 690 per UL 1741 certifications. These approvals verify safe operation in utility-scale and commercial solar installations, ensuring industry-standard performance and simplifying regulatory audits.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This supports risk mitigation in project budgets and provides a clear basis for maintenance planning and ROI analysis.