Eaton DCU1063FWM DC Disconnect - NEMA 4X 600 VDC
Part Number: DCU1063FWM
Quick Summary
The Eaton DCU1063FWM DC disconnect provides a rugged, ungrounded 1-circuit solution for solar PV systems. This design reduces wiring complexity and enhances safety in outdoor installations where exposure to dust, moisture, and corrosion is common. It carries NEC 690 per UL 1741 and UL 98B certifications, plus a NEMA 4X enclosure, delivering reliable performance in harsh environments. As a heavy-duty DC disconnect with fusible protection, it supports 600 VDC and up to #14-1/0 AWG lugs, aligning with modern solar and industrial power architectures. For engineers and procurement teams, this unit offers installer-friendly robustness, long-term reliability, and a clear path to code-compliant, low-downtime operation in distributed PV systems.
Product Information
Extended Description
DCU1063FWM Eaton: Eaton heavy duty DC disconnect,DC disconnect/ungrounded system,100A,NEMA 4X,Grade 304 stainless steel,Fusible,Ungrounded,#14-1/0 AWG lug capacity, #14-1/0 AWG solid return,600 Vdc,1,DC Photovoltaic Applications
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1063FWM
UPC
786685557113
Product Length/Depth
25.5 in
Product Height
9 in
Product Width
13.25 in
Product Weight
27 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
Maximum voltage
600 VDC
NEMA rating
NEMA 4X
Protection
Fusible
Application
Solar
Main lug wire size
#14-1/0 AWG lug capacity, #14-1/0 AWG solid return
System voltage
600 VDC per pole
Voltage rating
600 VDC
Series
DC Photovoltaic Applications
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Rugged enclosure and corrosion-resistant construction → enhances outdoor durability and reduces maintenance costs in harsh environments, enabling longer service intervals in solar installations. The 304 stainless steel NEMA 4X enclosure protects internal components from water, dust, and contaminants, improving uptime and safety for operators during routine access and testing. 1 circuit, 100A rating, fusible protection → delivers targeted protection while minimizing fault exposure, lowering insurance and risk management concerns for utility-scale and commercial PV projects. Ungrounded system design → simplifies integration with grounded DC bus architectures and reduces stray current paths, streamlining compliance with site-specific electrical layouts. Lug capacity #14-1/0 AWG supports a wide range of conductors, enabling flexible field wiring and easier commissioning during panel tie-ins and retrofits. 600 VDC maximum voltage and 600 VDC per pole specification → ensures compatibility with common PV arrays and DC distribution schemes, reducing the need for mid-project hardware changes. Compatibility with Solar application standards and UL/NEC certifications → provides confidence in fast-tracking procurement, installation, and commissioning while maintaining regulatory alignment.
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FAQs
The DCU1063FWM is a 1-circuit fusible DC disconnect rated for up to 100A and 600 VDC. It uses lug connections supporting #14-1/0 AWG conductors, making it compatible with standard PV combiner boxes and string inverters. Its NEMA 4X enclosure and 304 stainless steel construction simplify mounting to outdoor racking and existing structural frames while maintaining safe, code-compliant wiring in harsh environments.
This unit is certified for NEC 690 per UL 1741 and UL 98B, with a NEMA 4X rated enclosure and 304 stainless steel body. These certifications confirm suitability for light to medium outdoor solar installations, provide protection against weather and corrosion, and align with typical utility and commercial project specifications.
Yes. The product is specified as ungrounded, which simplifies certain solar DC configurations and fault isolation strategies. Its fusible protection and 600 VDC rating support reliable operation in ungrounded topologies, while the enclosure's ruggedness helps prevent ingress and ensures safe maintenance access.
With dimensions around 25.5 in length, 13.25 in width, and 9 in height, the DCU1063FWM is designed for outdoor, space-constrained locations. The 27 lb weight facilitates manageable mounting and replacement, and the lug capacity for #14-1/0 AWG wires provides flexible wiring options without oversized hardware or extensive modification.
The combination of a rugged NEMA 4X enclosure, corrosion-resistant stainless steel, and fusible protection reduces maintenance cycles and downtime. By meeting NEC 690 requirements and UL certifications, it accelerates project approval, supports compliant diagnostics, and minimizes non-productive service interruptions in solar installations, delivering a favorable total cost of ownership.