Eaton DCU3064FWM DC Disconnect - NEMA 4X, 600VDC
Part Number: DCU3064FWM
Quick Summary
DCU3064FWM is a heavy-duty DC disconnect for safe isolation of solar DC circuits in outdoor installations. Many installers struggle with corrosion resistance, weather exposure, and wiring complexity when selecting a disconnect for PV systems. This model offers NEC 690 per UL 1741 and UL 98B certifications, plus a NEMA 4X enclosure to withstand harsh environments. Built with a 304 stainless steel enclosure, it delivers long-term durability and risk reduction, while straightforward installation supports faster projects and easier maintenance. Its 3 circuits and 200 A rating align with common solar array configurations for reliable isolation.
Product Information
Extended Description
DCU3064FWM Eaton: Eaton heavy duty DC disconnect,DC disconnect/ungrounded system,200A,NEMA 4X,Grade 304 stainless steel,Fusible,Ungrounded,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-#14,600 Vdc,3
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU3064FWM
UPC
786685625270
Product Length/Depth
35.38 in
Product Height
11.63 in
Product Width
24.46 in
Product Weight
70 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
3
Ground
Ungrounded
Maximum voltage
600 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
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
Feature: 200 A amperage rating with 3 circuits. Business impact: Handles robust solar arrays while keeping fault isolation localized, reducing downtime and permitting scalable PV designs. Application: Suitable for utility-scale and commercial rooftop solar installations where reliable isolation is mandatory. Feature: Fusible protection with ungrounded system configuration. Business impact: Delivers controllable fault protection while minimizing ground fault pathways, improving safety and compliance in ungrounded DC systems. Application: Critical in solar PV and energy storage projects requiring fuse protection and rapid disconnect capability. Feature: NEMA 4X stainless steel enclosure (304 SS). Business impact: Exceptional corrosion resistance and weather durability for outdoor installations, lowering maintenance costs over time. Application: Outdoor PV in harsh environments or washdown areas. Feature: 600 VDC system voltage rating and heavy-duty switch design. Business impact: Supports high-voltage DC isolation with reliable mechanical action, enabling faster commissioning and safer lockout/tagout procedures. Application: 600 VDC solar arrays and similar ungrounded DC applications. Feature: Compatible main lug terminations (LC SR EG) for varied conductor sizes. Business impact: Simplifies field wiring across multiple codes and reduces inventory complexity. Application: Connects 300 kcmil-#6 and smaller conductors for flexible installation. Feature: Large footprint and weight (35.38 in L, 24.46 in W, 11.63 in H, 70 lb). Business impact: Demonstrates robust enclosure integrity and ease of mounting in equipment rooms or outdoor enclosures. Application: Prefabricated, pre-wired disconnects for solar arrays and electrical protection corridors.
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FAQs
When planning installation, account for the 35.38 in length, 24.46 in width, 11.63 in height, and 70 lb weight to ensure proper mounting clearances. The unit’s NEMA 4X enclosure and 304 stainless steel construction are designed for outdoor exposure, while the 200 A, 3-circuit configuration supports mid-size solar arrays. Termination options (LC, SR, EG) accommodate a range of conductor sizes, simplifying field wiring.
Yes. The product is certified under NEC 690 requirements per UL 1741 and UL 98B, with a 600 VDC rating and fusible protection. These certifications validate safe operation in solar applications and help ensure regulatory compliance, performance reliability, and safer maintenance practices during installation and servicing.
The 200 A rating across three circuits enables safe, modular isolation of multiple DC strings or sub-arrays, reducing fault impact and enabling faster fault diagnosis. This configuration supports scalable PV designs, lowers wiring complexity, and aligns with common solar array topologies, improving overall system reliability and uptime.
Absolutely. The enclosure is NEMA 4X rated and crafted from 304 stainless steel, delivering excellent corrosion resistance and weatherproofing. This makes it suitable for exterior installations, washdown environments, and coastal or industrial sites, reducing corrosion-related maintenance and extending service life.
Investing in DCU3064FWM delivers improved safety, quicker disconnect operations, and consistent compliance with NEC/UL requirements. The rugged stainless-steel enclosure and optimized wiring options minimize rework, while the fusible protection reduces equipment damage risk. The result is lower maintenance costs, faster project completion, and a higher return on solar investments.