Eaton DCU3063FWM DC Disconnect - NEMA 4X, 600 VDC
Part Number: DCU3063FWM
Quick Summary
Eaton DCU3063FWM DC disconnect provides a rugged ungrounded switch for solar PV installations. In the field, engineers face corrosion, moisture ingress, and space constraints that complicate reliable DC isolation. This unit carries UL 98B and NEC 690 per UL 1741 compliance and a NEMA 4X stainless steel enclosure for harsh outdoor environments. With a 100 A rating across three circuits, it delivers scalable protection for solar arrays, while a fusible design and robust enclosure reduce maintenance needs and downtime. From a procurement perspective, the heavy-duty 304 stainless steel enclosure lowers corrosion-related failures, supporting longer service life and a lower total cost of ownership.
Product Information
Extended Description
DCU3063FWM 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,3,DC Photovoltaic Applications
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3063FWM
UPC
786685557595
Product Length/Depth
10.22 in
Product Height
24.95 in
Product Width
16.13 in
Product Weight
40 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
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
3
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
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - DCU3063FWM
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 100 A amperage rating and three-circuit configuration give scalable protection for multiple PV strings. Business impact: This enables a compact, centralized point of isolation, reducing switchgear footprint and improving system uptime. Application: Ideal for solar installations where modular DC protection is needed across several arrays. Industry note: The configuration aligns with common PV string architectures, simplifying design and field commissioning. | Feature: Fusible protection provides rapid fault isolation and straightforward maintenance. Business impact: Lower fault propagation risk and predictable maintenance cycles translate to reduced downtime and safer backup operations. Application: Useful in utility-scale PV and commercial rooftops where fast, clean disconnection matters for safety and performance. Engineers report faster fault clearance with standard fusing options. | Feature: NEMA 4X enclosure and 304 stainless steel construction deliver superior corrosion resistance and weather sealing. Business impact: Longer service life reduces replacement costs and keeps outlets protected in outdoor environments. Application: Outdoor solar or desert locations where exposure to moisture, dust, and cleaning agents is a concern; ideal for harsh installations. | Feature: 600 VDC system voltage rating and per-pole voltage capability provide robust insulation margins. Business impact: Supports code-compliant DC distribution and enhances safety margins for high-energy PV circuits. Application: High-voltage DC circuits in solar arrays requiring reliable isolation with compliance to NEC 690 per UL1741. | Feature: Flexible lug capacity for #14-1/0 AWG conductors, including solid returns. Business impact: Eases wiring, reduces field labor, and accommodates diverse conductor types. Application: Wiring configurations for both stranded and solid conductors in ungrounded PV systems, enabling faster installation and easier future upgrades. | Feature: Certifications and warranty support provide confidence in procurement decisions. Business impact: UL 98B, NEC 690 per UL 1741 alignment reduces compliance risk while offering a structured warranty to safeguard investments. Application: For procurement teams seeking proven, auditable protection for solar projects.
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FAQs
To install, mount the unit in a sheltered outdoor location with clear access for servicing. Use appropriate conduit fittings and torque specs for lug connections, ensure the three circuits are correctly configured, and verify compliance with NEC 690 for PV systems. Verify the 600 VDC per pole rating and the NEMA 4X enclosure rating for weather protection.
The 600 VDC rating provides a generous insulation margin for high-energy DC circuits typical in PV arrays, reducing arcing risk and enabling safer manual disconnection. This rating supports compliant wiring practices, proper conductor sizing, and ensures the disconnect can be integrated into standard DC power paths without over-stressing insulation or terminations.
Yes. The unit is built with a 304 stainless steel enclosure rated NEMA 4X for outdoor exposure and corrosion resistance. It carries UL 98B and NEC 690 per UL 1741 certifications, aligning with code requirements for photovoltaic protection and safe operation in challenging environments.
The fusible protection design simplifies fault isolation and reduces maintenance complexity, while the rugged stainless steel enclosure lowers corrosion-related failures. A one-year Eaton warranty offers protection against manufacturing defects, and the durable construction supports longer service life, contributing to a lower total cost of ownership over the system lifecycle.
The DCU3063FWM supports main lugs rated for #14-1/0 AWG conductors, for both stranded and solid wiring. This flexible lug capacity simplifies field wiring, accommodates multiple PV strings, and speeds installation in ungrounded DC systems, while maintaining reliable contact and ease of future upgrades.