Eaton DCU1104FWM DC disconnect - NEMA 4X
Part Number: DCU1104FWM
Quick Summary
The Eaton DCU1104FWM DC disconnect provides rugged 200 A protection for solar DC circuits. In outdoor or corrosive environments, downtime often results from corrosion, leaks, or failed switches. It carries NEC 690 per UL 1741 and UL 98B certifications, with a 304 stainless steel NEMA 4X enclosure. Designed for solar PV systems, it helps installations meet safety, regulatory, and maintenance goals while lowering lifecycle costs. Its 200 A rating, 1000 VDC capability, and fusible protection support fast, compliant disconnections during fault events with minimal arc exposure. This combination translates into safer installations and reduced downtime for solar operators.
Product Information
Extended Description
DCU1104FWM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 4X, Grade 304 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 4X, 1, Fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1104FWM
UPC
786685625683
Product Length/Depth
35.38 in
Product Height
11.63 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
NEC 690 per UL 1741 UL 98B
Type
DC disconnect/ungrounded system
Amperage Rating
200 A
Number of circuits
1
Maximum voltage
1000 VDC
NEMA rating
NEMA 4X
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 4X
Enclosure material
304 stainless steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
With a 200 A amperage rating and fusible protection, the DCU1104FWM provides a clean, safe point of isolation for solar DC circuits. This directly reduces arc exposure during maintenance, minimizes fault propagation, and simplifies wiring protection schemes for utility-scale or commercial PV installations. It is well-suited for single-circuit in/out disconnects in PV arrays, battery storage interfaces, and other high-current DC routes. The NEMA 4X enclosure crafted from 304 stainless steel delivers superior corrosion resistance and rugged outdoor performance. That weatherproof, chemical-resistant construction translates into reduced enclosure maintenance, longer service life in exposed locations, and lower lifecycle costs for rooftop or ground-mount solar projects. At 35.38 in long, 16.54 in wide, and 11.63 in high with a 45 lb weight, the unit offers a compact footprint that fits tight electrical rooms while supporting robust mounting. Its 1-circuit design and clear labeling simplify installation and commissioning, while providing ample space for fuse configuration and wiring termination per LC, SR, and EG specifications. The device supports main lug sizes across multiple conductors: 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. This flexibility reduces field rewiring when upgrading systems and improves compatibility with solar arrays, inverters, and combiner boxes. Compliance and warranty strengthen ROI: NEC 690 per UL 1741 and UL 98B certifications ensure PV safety and code compliance, backed by Eaton’s one-year warranty (or 18 months from shipment). In practice, this minimizes risk, lowers total cost of ownership, and supports fast project approvals for solar developers and OEMs.
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FAQs
The DCU1104FWM is designed for solar PV systems as a single-circuit, 200 A DC disconnect rated up to 1000 VDC. It fits outdoor, harsh environments with a 304 stainless steel NEMA 4X enclosure and accommodates LC, SR, and EG conductor configurations. This enables reliable isolation at the array, inverter, or battery interface in commercial or utility-scale installations.
Key specs include a 200 A amperage rating, 1000 VDC maximum voltage, and a fusible protection scheme in a single-circuit configuration. Wiring options cover 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, enabling flexible field terminations for PV arrays and associated DC equipment.
Yes. The unit is certified for NEC 690 per UL 1741 and UL 98B, ensuring critical PV safety and compliance. This aligns with common utility interconnection and solar installation requirements, reducing regulatory risk for projects and helping engineers meet code during design reviews and commissioning.
The enclosure is NEMA 4X made from 304 stainless steel, suitable for outdoor use. Physical dimensions are 35.38 in long, 11.63 in high, and 16.54 in wide, with a weight of 45 lb. It supports robust mounting and wiring termination per LC, SR, and EG configurations, simplifying field integration with PV arrays, inverters, and storage systems.
Eaton offers a one-year warranty from the installation date or 18 months from shipment, whichever occurs first (Policy 25-000). For project timelines, Eaton specification sheets and support resources are available, helping with commissioning, spare parts planning, and long-term maintenance planning.