Eaton DH166NWK DC disconnect - UL Listed
Part Number: DH166NWK
Quick Summary
Eaton DH166NWK DC disconnect is a high-current isolation device designed to safely disconnect 600 VDC power in industrial, solar, and control-system applications. This compact, single-pole unit helps operators prevent unintentional energization and supports safer maintenance workflows. A common pain point is conflicting enclosure space and corrosion-prone components in harsh environments; the DH166NWK addresses this with a robust NEMA 4X stainless steel enclosure and fusible protection. Certified for UL listing and built to withstand grounded conductor configurations, it delivers reliable performance in demanding settings. By pairing a fusible disconnect with a neutral block and durable materials, it supports compliant installations while reducing maintenance cycles and total cost of ownership for data centers, manufacturing floors, and PV installations.
Product Information
Extended Description
DH166NWK Eaton: Eaton DC disconnect, 600VDC, 600A, One-pole, Class R, Fusible with neutral block for grounded conductor, NEMA 4X stainless, #14-#2 Cu/Al
Product Name
Eaton DC disconnect
Catalog Number
DH166NWK
UPC
786685384559
Product Length/Depth
15.46 in
Product Height
19.25 in
Product Width
10.25 in
Product Weight
32 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
NEMA rating
NEMA 4X
Protection
Fusible
Number of poles
Single-pole
Voltage rating
600 VDC
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Protection
Fusible
DC disconnects for 600VDC solar photovoltaic installations (single circuit)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - DH166NWK
Feature: 600 A, 600 VDC rating paired with fusible protection; Business Impact: enables safe isolation of high-energy circuits with minimal arc risk and clear maintenance procedures; Application: solar PV string panels and industrial DC distribution where reliability is critical. Feature: One-pole design with neutral block for grounded conductor; Business Impact: simplifies wiring and reduces enclosure footprint while maintaining code-compliant grounding; Application: control panels and switchgear where space and safety are priorities. Feature: NEMA 4X enclosure in 304 stainless steel; Business Impact: delivers superior corrosion resistance and weatherproofing, lowering service downtime in wash-down or outdoor environments; Application: outdoor equipment rooms, outdoor substations, and harsh industrial environments. Feature: Compact dimensions (15.46 in L Ă— 19.25 in H Ă— 10.25 in W) and 32 lb weight; Business Impact: easy handling and mounting in constrained spaces, accelerating installation; Application: retrofit projects and limited-access installations. Feature: UL Listed certification and documented performance; Business Impact: assures compliance with safety standards and regulatory requirements, shortening procurement cycles; Application: regulated facilities and projects requiring third-party verification. Feature: Compatibility with #14-#2 Cu/Al conductors; Business Impact: flexible wiring options reduce komplet wiring time and stock levels; Application: standard DC power distribution tasks across multiple industries.
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FAQs
The DH166NWK is a single-pole DC disconnect designed for integration in standard industrial enclosures and control panels. Its 15.46 inch depth, 19.25 inch height, and 10.25 inch width support compact layouts, while the 32 lb weight facilitates handling during mounting. It accepts #14-#2 Cu/Al conductors with a neutral block for grounded conductor configurations, simplifying wiring and reducing installation time.
This unit provides 600 A current rating and 600 VDC voltage rating with fusible protection. It is configured as a one-circuit, single-pole device suitable for DC power isolation. The enclosure is NEMA 4X, fabricated from 304 stainless steel, offering robust corrosion resistance in harsh environments and ensuring reliable performance in demanding installations.
Yes. The DH166NWK is designed for grounded DC systems up to 600 VDC and 600 A, making it well-suited for solar photovoltaic DC dispatch and battery storage interfaces. Its fusible protection with a neutral block supports safe current interruption, while the NEMA 4X enclosure protects against weather and corrosion in outdoor PV installations.
The DH166NWK carries UL Listed certification, indicating compliance with recognized safety standards. It uses a NEMA 4X stainless steel enclosure rated for outdoor and wash-down environments, offering corrosion resistance and reliable operation in harsh locations. The combination supports compliance in regulated facilities and reduces risk during maintenance.
Eaton provides a standard warranty policy of one year from installation or eighteen months from shipment, whichever occurs first. Maintenance focuses on inspecting the fusible block, ensuring neutral conductor connections remain tight, and verifying enclosure seals for NEMA 4X integrity. The durable stainless enclosure minimizes corrosion-related maintenance and extends service life in challenging environments.