Eaton DCU1104FRM DC disconnect - NEMA 3R, 1000 VDC
Part Number: DCU1104FRM
Quick Summary
Eaton heavy duty DC disconnect is a rugged, safe DC isolation device for solar PV systems. Engineers often struggle with outdoor disconnects that complicate maintenance, increase downtime, and jeopardize code compliance. This model delivers UL 98B and NEC 690 compliance under UL 1741, with a NEMA 3R enclosure to withstand harsh environments while operating at 1000 VDC. Designed for solar applications, it offers a 200 A, single-circuit solution that simplifies installation, reduces field terminations, and lowers total cost of ownership across PV projects. The robust warranty and industry-agreed certifications further support predictable performance and long-term reliability for energy infrastructure deployments.
Product Information
Extended Description
DCU1104FRM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 3R, Stainless steel, 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, 1, Fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1104FRM
UPC
786685625669
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
1
Maximum voltage
1000 VDC
NEMA rating
NEMA 3R
Protection
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
Fusible
Switch type
Heavy duty
Protection
Fusible
Feature → Business Impact → Application: 200 A amperage rating across a single circuit enables robust protection for solar DC strings with headroom for typical PV installations, improving system uptime and reducing the need for mid-project redesign. This directly translates to shorter project timelines and lower labor costs on deployment and maintenance. Feature → Business Impact → Application: Fusible protection simplifies fuse coordination and enhances arc-flash mitigation, supporting NEC 690 compliance and safer maintenance practices across outdoor arrays. This is particularly valuable for utility-scale and commercial rooftop projects where downtime is costly and safety is paramount. Feature → Business Impact → Application: NEMA 3R enclosure offers weather-resistant protection for outdoor installations, minimizing corrosion risk and reducing enclosure-related service intervals. This suits rooftop and open-site deployments where environmental exposure is a daily factor. Feature → Business Impact → Application: Main lug wire size options LC SR EG provide flexible wiring configurations, enabling easy field terminations with 300 kcmil-#6 conductors or smaller AWG runs, which speeds up assembly and reduces wiring errors. Feature → Business Impact → Application: UL 98B, NEC 690 per UL 1741 certifications, plus a 1-year warranty give project teams confidence in compliance and lifecycle cost, supporting longer-term ROI and service planning for solar portfolios.
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FAQs
The DCU1104FRM is a single-circuit 200 A DC disconnect rated for up to 1000 VDC and housed in a NEMA 3R enclosure. Plan for LC, SR, or EG wire termination using the listed conductor ranges (LC: 300 kcmil-#6 out, SR: 300 kcmil-#6 out, EG: #4-#14 in; out 1/0-#14). Mounting must comply with outdoor conditions and Vdc clearance. Verify fuse configuration and ensure coordination with upstream protective devices per NEC 690.
The unit complies with UL 98B, NEC 690 as referenced by UL 1741, indicating robust electrical protection and safe operation in solar installations. These approvals support compliance during inspections, simplify project approvals, and reduce the risk of non-conformance penalties. They also reassure maintenance teams about consistent performance in harsh environments.
Yes. The DCU1104FRM features a NEMA 3R enclosure designed for outdoor use. While datasheets cite painted galvanized steel, the key takeaway is weather resistance and corrosion protection to withstand rooftop and open-site exposure. Ensure proper drainage, mounting, and local environmental considerations to maximize enclosure longevity.
The disconnect is rated for 200 A with a maximum voltage of 1000 VDC and supports one circuit. Main lug configurations cover LC, SR, and EG wiring: LC is in 300 kcmil-#6 out 300 kcmil-#6; SR is in 300 kcmil-#6 out 300 kcmil-#6; EG handles in #4-#14 and out 1/0-#14. This flexibility supports a range of PV string and combiner configurations.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first (Eaton policy 25-000). For support, contact Eaton technical support or your authorized Eaton distributor. This warranty covers manufacturing defects and helps protect project ROI over the first year of operation.