Eaton DH166NDK DC Disconnect for 600 VDC Solar, UL Listed
Part Number: DH166NDK
Quick Summary
Eaton DH166NDK DC disconnect isolates a single DC circuit in solar and industrial power installations. Engineers need reliable isolation that reduces arc risk, minimizes downtime, and speeds field commissioning. It carries UL Listed certification and uses a NEMA 12/3R, painted galvanized steel enclosure for durable indoor and outdoor use. Designed for 600 A, 600 VDC operation with fusible protection and a neutral, it delivers strong safety margins while simplifying fuse coordination. This supports efficient DC power distribution in solar PV installations and other industrial applications, helping procurement and maintenance teams achieve compliant, safe, and cost-conscious projects.
Product Information
Extended Description
DH166NDK Eaton: Eaton DC disconnect, 600 A, NEMA 3R, Painted galvanized steel, Class R, Fusible with neutral, Single-pole, Two-wire, Solar disconnect switch, 600 V, (1)#2-(1)600 kcmil and (1)#1/0-(1)750 kcmil Al
Product Name
Eaton DC disconnect
Catalog Number
DH166NDK
UPC
786685384535
Product Length/Depth
12.84 in
Product Height
51.82 in
Product Width
23.66 in
Product Weight
150 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 Listed
Type
DC disconnect/grounded system
Amperage Rating
600 A
Number of circuits
1
Protection
Fusible
Voltage rating
600 VDC
Enclosure
NEMA 12/3R
Enclosure material
Painted galvanized steel
Protection
Fusible
DC disconnects for 600VDC solar photovoltaic installations (single circuit)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - DH166NDK
Feature: 600 A amperage rating, single-pole, fusible with neutral. Benefit: Provides robust protective isolation and fuse coordination for DC power systems, reducing arc risk and improving system reliability. Application: Ideal for solar PV DC disconnects, battery storage circuits, and industrial DC distribution. Feature: 600 VDC rating with a NEMA 12/3R painted galvanized steel enclosure. Benefit: Durable operation in indoor and outdoor environments, meeting enclosure standards while simplifying installation in rugged facilities. Application: Outdoor substations, equipment rooms, and harsh industrial sites. Feature: Large aluminum conductor termination up to (#2–600 kcmil) and (#1/0–750 kcmil) Al. Benefit: Reduces field splicing, speeds commissioning, and supports high-current DC loops with reliable lug connections. Application: Solar and large DC distribution networks requiring flexible conductor options. Feature: UL Listed certification and substantial enclosure protection. Benefit: Strengthens safety compliance audits and vendor qualification, lowering risk in regulated environments. Application: Any industrial or solar facility requiring certified DC isolation. Feature: Heavy-duty, weather-resistant galvanised steel construction with NEMA 3R capability. Benefit: Long-term durability with minimal maintenance, reducing total cost of ownership. Application: Facilities exposed to variable climate or humidity. Feature: Documentation and warranty alignment (1-year policy; 18 months from shipment). Benefit: Clear service expectations and reduced procurement risk, supporting maintenance planning and budgeting. Application: Enterprise-level installation programs and long-range capital projects.
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FAQs
Terminations support aluminum conductors from #2 to 600 kcmil on one side and #1/0 to 750 kcmil on the other, so verify the exact lug sizes and torque specs in the Eaton specification sheet. Plan for ample clearance and a stable mounting surface, as the unit weighs about 150 lb. Use proper lifting equipment during installation.
The 600 A rating establishes primary protection for the DC circuit and guides fuse coordination to prevent overcurrent while preserving system safety. With fusible protection and a neutral, the DH166NDK supports reliable isolation and reduces arc risk, making it suitable for high-current solar and industrial DC distributions.
Yes. The DH166NDK uses a UL Listed design and a NEMA 12/3R enclosure with a painted galvanized steel body, promoting durability in indoor and outdoor settings. Its rugged construction and protective enclosure help withstand dust, moisture, and temperature variations typical of solar sites and industrial yards.
The unit is UL Listed and housed in a NEMA 12/3R enclosure. This combination ensures compliance with established electrical safety and enclosure standards for industrial and solar DC systems, supporting installation approvals and ongoing regulatory audits.
The device's robust protection and durable construction contribute to reduced maintenance downtime and improved system reliability. A 1-year warranty (18 months from shipment) provides cost protection during initial use, while UL Listing and solid enclosure ratings support long-term ROI through fewer field issues and easier procurement.