Eaton DCU2103URM DC disconnect - 1000 VDC, UL 98B
Part Number: DCU2103URM
Quick Summary
DC disconnect Eaton DCU2103URM provides reliable isolation for solar PV arrays. Engineers often struggle with safe isolation, arcing risk, and regulatory compliance in 1000 VDC solar installations. Certified to UL 98B and NEC 690 per UL 1741, this unit also uses a NEMA 3R painted galvanized steel enclosure for outdoor exposure. This heavy-duty, non-fusible, ungrounded disconnect is designed for straightforward installation and long-term cost savings for solar developers and electrical OEMs.
Product Information
Extended Description
DCU2103URM Eaton: Eaton Heavy duty DC disconnect, 100 A, NEMA 3R, Painted galvanized 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
DCU2103URM
UPC
786685558042
Product Length/Depth
10.22 in
Product Height
24.95 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 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - DCU2103URM
Selling Policy 25-000 - Distribution and Control Products and Services
The 100 A amperage rating with two circuits supports typical solar PV strings, enabling safe, efficient isolation of medium-size arrays while reducing embodied energy in controls wiring. The NEMA 3R enclosure, crafted from painted galvanized steel, delivers outdoor durability, weather resistance, and easier compliance with site-building codes. Ungrounded, non-fusible design simplifies protection strategy and lowers maintenance requirements by eliminating fuse replacements during routine service windows. Main lug capacity supports #14-1/0 AWG conductors, providing flexible field wiring and straightforward termination without bespoke harnesses. Certifications including UL 98B and NEC 690 per UL 1741 reinforce regulatory compliance, aiding risk management and project approval. Rated for 1000 VDC, the DC photovoltaic applications series addresses high-voltage DC distribution while minimizing installation complexity and lifecycle costs.
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FAQs
For solar PV deployments, plan for a two-circuit, 100 A DC disconnect in a NEMA 3R enclosure. Ensure wiring uses #14-1/0 AWG conductors with both lug and solid return capabilities, and accommodate the 1000 VDC system voltage. Follow UL 98B and NEC 690 per UL 1741 for compliance, and verify space inside the enclosure for safe assembly and future maintenance.
The unit is rated for 100 A with two circuits, is ungrounded and non-fusible, and supports an operating system voltage of up to 1000 VDC. It is designed for DC photovoltaic applications, with a NEMA 3R enclosure and painted galvanized steel construction to withstand outdoor environments. Main lug capacity accommodates #14-1/0 AWG conductors for both lug and solid return wiring.
Yes. The DCU2103URM uses a NEMA 3R enclosure and painted galvanized steel, engineered for outdoor solar installations and challenging environments. With a weight around 37 lb and robust mounting provisions, it provides durable mechanical protection and reliable isolation in mid-to-large outdoor PV deployments.
This disconnect is certified to UL 98B and supports NEC 690 as applied through UL 1741. These certifications help ensure enclosure protection, fault containment, and compliance with utility interconnection requirements for solar PV installations, reducing project risk and accelerating permitting and acceptance processes.
The product carries Eaton’s standard warranty policy: one year from installation or eighteen months from shipment, whichever occurs first. This coverage supports parts and return-to-service considerations, and Eaton’s selling policy provides additional guidance on distributor and service provisions to help ensure ongoing performance and support for solar projects.