Eaton DCU1103UXM DC Disconnect - UL 98B / NEC 690 per UL 1741
Part Number: DCU1103UXM
Quick Summary
Eaton DCU1103UXM is a heavy-duty DC disconnect for solar PV systems. Engineers often face corrosion, unreliable contacts, and installation challenges in outdoor environments. UL 98B and NEC 690 per UL 1741 certifications guide safe integration, while a NEMA 4X, 316 stainless steel enclosure delivers reliable weatherproof protection. This device delivers a 100 A rating and 1000 VDC capability with simple lug connections, reducing field install time and lifecycle costs. Its ungrounded, non-fusible design minimizes fault propagation and simplifies maintenance. With rugged construction and industry-leading certifications, DCU1103UXM supports robust solar DC protection, improving uptime for commercial and utility-scale PV projects.
Product Information
Extended Description
DCU1103UXM Eaton: Eaton Heavy duty DC disconnect, 100 A, NEMA 4X, Grade 316 stainless steel, Non-fusible, Ungrounded, #14-1/0 AWG lug capacity, #14-1/0 AWG solid return, 1, DC photovoltaic applications, Rating:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1103UXM
UPC
786685558011
Product Length/Depth
10.22 in
Product Height
24.95 in
Product Width
11.79 in
Product Weight
24 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
1
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
316 stainless steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature: 100 A amperage rating with a single circuit design. Business Impact: Enables predictable current handling at the point of interconnection, reducing wiring complexity and risk of overload. Application: Ideal for a single-string solar feed where compact protection is required. Feature: 1000 VDC system voltage and voltage rating. Business Impact: Supports modern high-voltage PV arrays, lowering the need for multiple disconnects and simplifying wiring schemes. Application: Utility-scale and commercial rooftop installations. Feature: Non-fusible, ungrounded protection. Business Impact: Simplifies selectivity and maintenance planning while meeting common non-fused protection strategies. Application: PV systems that require straightforward disconnection without fusing options. Feature: NEMA 4X enclosure in 316 stainless steel. Business Impact: Delivers superior corrosion resistance and washdown durability, reducing maintenance frequency and downtime. Application: Outdoor and harsh environments, including coastal or industrial sites. Feature: Main lug capacity for #14-1/0 AWG wires (lug and solid return). Business Impact: Enhances wiring flexibility and compatibility with common PV interconnects, speeding up installation. Application: Field wiring to inverters and collectors. Feature: Certifications UL 98B and NEC 690 per UL 1741. Business Impact: Ensures regulatory compliance and safety margins, easing code approvals and inspections. Application: Solar power system protection across residential, commercial, and utility projects. Feature: Overall dimensions and weight (10.22 in D, 24.95 in H, 11.79 in W; 24 lb). Business Impact: Facilitates equipment layout planning and enclosure budgeting with predictable footprint. Application: System integration in electrical rooms and outdoor cabinets.
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FAQs
Yes. The DCU1103UXM is rated for 1000 VDC and supports a single 100 A circuit. It accepts main lug connections for #14-1/0 AWG conductors (lug capacity and solid return). For installation, ensure wiring methods comply with NEC and local codes, and use appropriately rated lugs and connectors to maintain electrical integrity in outdoor enclosures.
Key specs include a 100 A amperage rating, 1 circuit, non-fusible protection, and an ungrounded configuration. System voltage and voltage rating are both 1000 VDC. The unit is designed for solar applications with a NEMA 4X enclosure and 316 stainless steel construction, providing durable, non-fusible DC protection in harsh environments.
Yes. The DCU1103UXM features a 316 stainless steel enclosure rated NEMA 4X, which offers superior corrosion resistance and washdown durability. This makes it well-suited for outdoor coastal and harsh environments where exposure to moisture and salt spray is a concern, while maintaining robust electrical protection for PV systems.
The unit carries UL 98B and NEC 690 per UL 1741 certifications, aligning with established safety and performance requirements for DC disconnects in solar installations. These certifications help with code compliance, simplify inspections, and provide confidence that the device meets industry-accepted protection and operating criteria for PV systems.
The product carries a one-year warranty from installation or eighteen months from shipment, whichever occurs first. Maintenance considerations include inspecting the NEMA 4X enclosure for seals and fasteners and verifying lug connections during periodic checks. The non-fusible, ungrounded design can reduce maintenance complexity and support longer service life, contributing to lower lifecycle costs in solar projects.