Eaton DCU1103URM DC disconnect - NEMA 3R, 1000 VDC
Part Number: DCU1103URM
Quick Summary
DCU1103URM heavy-duty DC disconnects enable safe, reliable solar array isolation in commercial and industrial installations. Designers often struggle with ungrounded, non-fusible DC switches that complicate maintenance, lockout/tagout, and compliance. It carries NEC 690 per UL 1741 and UL 98B certifications, and its NEMA 3R enclosure delivers weather resistance for outdoor or harsh indoor environments. This solution combines a 100 A rating with single-circuit simplicity, reducing field wiring complexity while ensuring robust protection. By pairing a 1000 VDC system voltage with compatible lugs and solid returns, it supports reliable PV system layouts and straightforward installation. The result is improved uptime, safer disconnections, and simpler regulatory adherence for electrical protection and circuit control in solar projects.
Product Information
Extended Description
DCU1103URM 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, 1, DC photovoltaic applications, Rating:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1103URM
UPC
786685557922
Product Length/Depth
9.89 in
Product Height
21.99 in
Product Width
11.84 in
Product Weight
22 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
NEC 690 per UL 1741 UL 98B
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 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - DCU1103URM
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 100 A, single-circuit, non-fusible, ungrounded DC disconnect. Business impact: simplifies isolation points and reduces fault energy risk, improving maintenance efficiency and system safety. Application: solar PV installations and other ungrounded DC circuits. Long-tail keywords integrated: solar DC disconnect, ungrounded DC disconnect, 100 A DC switch. Feature: NEMA 3R enclosure in painted galvanized steel. Business impact: delivers outdoor durability, weather resistance, and corrosion protection, lowering enclosure-related downtime. Application: outdoor solar arrays, rooftop installations, and harsh indoor environments. Long-tail keywords integrated: outdoor rated enclosure, weather-resistant DC disconnect, galvanized steel enclosure. Feature: System voltage rating of 1000 VDC. Business impact: supports high-voltage PV architectures with a comfortable safety margin, enabling wider system design options. Application: utility-scale and commercial solar projects. Long-tail keywords integrated: 1000 VDC solar applications, high-voltage DC protection. Feature: Main lug capacity for #14-1/0 AWG (lug) and #14-1/0 AWG solid return. Business impact: offers flexible wiring options, reduces splicing, and accelerates field termination with robust connections. Application: PV combiner box terminations and DC distribution. Long-tail keywords integrated: lug capacity, DC wiring, #14-1/0 AWG. Feature: Certifications: NEC 690 per UL 1741 and UL 98B. Business impact: ensures regulatory compliance, performance benchmarks, and safer equipment selection. Application: code-compliant solar protection and circuit control. Long-tail keywords integrated: NEC 690 UL 1741, UL 98B certification, electrical protection standards. Feature: Enclosure and design suited for solar PV applications with non-fusible protection. Business impact: reduces risk of accidental fusion and simplifies system monitoring and maintenance. Application: solar DC protection and PV array isolation. Long-tail keywords integrated: non-fusible DC switch, solar PV applications, DC protection.
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FAQs
The DCU1103URM is designed for solar PV installations and other ungrounded DC circuits requiring a single-circuit, non-fusible disconnect. Its 100 A rating and 1000 VDC capability make it suitable for commercial and industrial solar arrays, where reliable isolation and safe maintenance are essential.
Key specs include 100 A amperage rating, 1 circuit, ungrounded configuration, non-fusible protection, 1000 VDC system voltage, and lug capacity for #14-1/0 AWG conductors with solid returns. This combination supports standard PV wiring practices and flexible field terminations.
Yes. It uses a NEMA 3R enclosure with painted galvanized steel, providing weather resistance for outdoor solar installations and indoor environments exposed to moisture or dust. This helps maintain performance and longevity in rooftop and exposed site conditions.
The unit accommodates #14-1/0 AWG lugs and solid returns, enabling diverse wiring configurations for DC PV circuits. This flexibility supports both string-level and main-bus terminations while maintaining a compact, single-circuit design.
The device is certified to NEC 690 per UL 1741 and UL 98B, with a NEMA 3R enclosure. These certifications help ensure code compliance for solar protection equipment and give engineers confidence in performance under regulated conditions.