Eaton fused safety switch DD366FDKW-00V2 - UL Listed (NEMA 12/3R)
Part Number: DD366FDKW-00V2
Quick Summary
Eaton fused safety switch provides a rugged, code-compliant disconnect for three-phase power in industrial control panels. Maintenance teams often struggle with unclear status indicators and unsafe lockouts, so this unit includes a load-side voltage indicator with a sight window for quick verification. UL Listed protection supports reliable regulatory compliance, while the NEMA 12/3R enclosure defends against dust and moisture in manufacturing environments; Class H fusing adds selective, high-energy protection. Designed for heavy, continuous service, it integrates with standard 600 V, 600 A motor control circuits and supports plant-wide protection strategies. With robust protection and clear visibility, it helps reduce downtime, improve maintenance safety, and lower total cost of ownership.
Product Information
Extended Description
DD366FDKW-00V2 Eaton: Eaton Double door single-throw fused safety switch, Voltage indicator load side, 600 A, NEMA 12/3R, Class H, Fusible without neutral, Three-pole, Three-wire, 600 V, Max Hp: 400, 500 hp (3PH @480/600 V), (1)#2(1)#2-(1)600, and (1)750 kcmil
Product Name
Eaton double door single-throw fused safety switch
Catalog Number
DD366FDKW-00V2
UPC
786679184370
Product Length/Depth
19.31 in
Product Height
25.32 in
Product Width
77.96 in
Product Weight
265 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
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Fusible without neutral
Number Of Poles
Three-pole
Number of wires
3
Type
Heavy duty double door safety switch
Amperage Rating
600A
Fuse class provision
Class H
HP rating - max
400, 500 hp (3PH @480/600 V)
Voltage rating
600 V
Product Category
Dust tight
Special features
V indicator load side, w/ window
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
Eaton Specification Sheet - DD366FDKW-00V2
Fusible, three-pole design without neutral provides reliable short-circuit protection and straightforward coordination with downstream devices, reducing neutral miswiring and simplifying installation in motor control centers. This translates to safer maintenance windows and fewer wiring errors in demanding industrial environments, especially on large 3PH feeders. The load-side voltage indicator with window delivers immediate status confirmation without opening the enclosure, cutting diagnostic time and improving change-out reliability for 600 V circuits in manufacturing lines. End-users gain measurable uptime benefits as protection remains robust while maintenance teams can verify line status quickly, safeguarding motors up to 500 HP at 480/600 V and reducing unplanned downtime. The NEMA 12/3R enclosure guards against dust and moisture in indoor and semi-exposed locations, enabling consistent performance in demanding plants. UL Listed for safety compliance, this switch aligns with procurement standards and reduces validation time during audits. The 600 A rating and Class H fuse balance protection and cost, supporting efficient coordination and predictable fuse life in high-load applications. Designed for heavy-duty operation, the unit occupies a space-efficient footprint while delivering motor control reliability, simplifying retrofits and new installations in industrial facilities where uptime is non-negotiable.
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FAQs
The DD366FDKW-00V2 uses a robust NEMA 12, NEMA 3R enclosure constructed from painted galvanized steel, suitable for indoor and select outdoor installations. It is a three-pole fusible switch rated for 600 A and 600 V, designed for panel mounting in industrial control environments and compatible with three-wire, three-phase systems. Ensure proper panel cutouts, clearance, and ventilation per local codes.
Key specs include a 600 A amperage rating, 600 V voltage rating, and Class H fuse provision for high-energy protection. The device supports up to 400–500 HP in a 3PH system at 480/600 V, with three poles and three wires. It is designed for reliable interrupting of motor feeders and provides safe disconnection in maintenance and fault conditions.
Yes. The enclosure ratings NEMA 12 and NEMA 3R indicate dust-tight protection and rain/ice exposure handling, respectively. This makes the switch suitable for indoor industrial spaces and semi-exposed locations where dust, moisture, or incidental weather exposure may occur, aligning with common industrial protection requirements without compromising safety.
The product carries UL Listed certification, supporting regulatory compliance for electrical safety. Warranty terms follow Eaton policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This provides a clear protection window and reduces total cost of ownership in long-running motor control applications.
The load-side voltage indicator enables rapid verification of line status without opening the door, reducing diagnostic time. Its high 600 A, 600 V rating accommodates large motors and feeders, decreasing downtime during fault clearance. Coupled with UL Listing and robust NEMA protection, it supports safer maintenance and faster audits, delivering lower operating costs over the equipment lifecycle.