Eaton DCU2104URM DC disconnect - NEMA 3R
Part Number: DCU2104URM
Quick Summary
The Eaton DCU2104URM DC disconnect provides a heavy-duty 200 A ungrounded switch for solar installations. Engineers and procurement teams often struggle with limited enclosure space and reliable isolation during maintenance. This unit carries UL 98B and NEC 690 per UL 1741 certifications, along with a NEMA 3R enclosure for outdoor service. The non-fusible design and 1000 VDC system capability simplify wiring, improve safety margins, and reduce field downtime. Designed for durable, code-compliant deployments, it supports flexible main-lug configurations and scalable solar protection within industrial electrical protection ecosystems.
Product Information
Extended Description
DCU2104URM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 3R, Stainless steel, Non-fusible, LC: In 300 MCM-#6 out 300 MCM-#6. SR: in 300 MCM-#6 out 300 MCM-#6. EG: in #4-#14 AWG out 1/0-#14, Max:1000 Vdc, NEMA 3R, 2, Non-fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2104URM
UPC
786685625584
Product Length/Depth
11.63 in
Product Height
35.38 in
Product Width
16.54 in
Product Weight
45 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
Type
DC disconnect/ungrounded system
Amperage Rating
200 A
Number of circuits
2
Maximum voltage
1000 VDC
NEMA rating
NEMA 3R
Protection
Non-fusible
Application
Solar
Main lug wire size
LC: In 300 kcmil-#6 out 300 kcmil-#6. SR: in 300 kcmil-#6 out 300 kcmil-#6. EG: in #4-#14 AWG out 1/0-#14
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
Feature: Amperage rating of 200 A delivers direct DC isolation for feeder circuits, enabling fast, safe shutoff without additional fusing. Business Impact: Reduces switchgear complexity and maintenance cost while increasing system uptime for solar farms and commercial PV installations. Application: Suitable for outdoor PV arrays and microgrid projects where high-current, reliable isolation is required. Feature: Number of circuits equals 2, allowing staged or separate DC paths to be independently managed. Business Impact: Improves fault isolation, simplifies wiring diagrams, and supports modular expansion in growing solar deployments. Application: Multi-string solar installations and energy storage interfaces where circuit segregation is advantageous. Feature: Maximum voltage rating of 1000 VDC supports modern high-voltage PV systems. Business Impact: Expands application scope without reconfiguring switchgear, lowering total cost of ownership. Application: Utility-scale and commercial solar with stringent voltage requirements. Feature: Enclosure rated NEMA 3R and constructed from painted galvanized steel. Business Impact: Delivers outdoor durability against weather, corrosion, and vandals, minimizing maintenance cycles. Application: Exterior switchgear housings for outdoor solar farms and rooftops. Feature: Main lug wiring configurations (LC, SR, EG) cover a wide range of conductor sizes. Business Impact: Simplifies field wiring, reduces labor time, and supports legacy and modern PV wiring practices. Application: Solar DC disconnect installations with diverse lead-in/output needs. Feature: Non-fusible protection and 1000 VDC system compatibility. Business Impact: Lower fault current risks and enables easier compliance with NEC/UL requirements. Application: Safe isolation in photovoltaic systems where fuse protection isn't required or desired.
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FAQs
The DCU2104URM is designed for outdoor PV systems with a NEMA 3R enclosure, stainless/galvanized steel housing, and non-fusible DC switching. It accepts up to 1000 VDC and provides two circuits, making it compatible with common solar string configurations and outdoor switchgear layouts while satisfying NEC 690 requirements per UL 1741.
Key specs include a 200 A amperage rating, 2 circuits, maximum 1000 VDC system voltage, and non-fusible protection. It supports LC SR EG main lug wiring configurations, with enclosures rated for outdoor use. Certifications include UL 98B and NEC 690 per UL 1741, ensuring compliance in solar electrical installations.
Yes. The unit features a NEMA 3R enclosure, painted galvanized steel construction, and non-fusible protection, delivering reliable operation in outdoor and semi-exposed environments. Its rugged housing helps resist weathering, corrosion, and mechanical exposure, aligning with solar PV installation needs in exposed outdoor locations.
The DCU2104URM carries UL 98B certification and NEC 690 compliance per UL 1741, reflecting its conformance to recognized safety and performance standards for DC power switching in photovoltaic systems. These certifications support safety, reliability, and regulatory acceptance in solar projects.
By providing a rugged, non-fusible, high-current DC disconnect with simple two-circuit configuration and 1000 VDC capability, maintenance time is reduced, field troubleshooting is simplified, and downtime is minimized. The robust enclosure and certifications also lower long-term maintenance costs and compliance risks in solar deployments.