Eaton DH365FPK Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH365FPK
Quick Summary
The Eaton DH365FPK heavy duty fusible safety switch provides reliable power isolation for large industrial circuits and service entrances. This unit is designed to minimize unplanned downtime by delivering fast, predictable fault interruption and simple field wiring. Key certifications such as UL Listed and NEMA 4 enclosure support outdoor and harsh-environment applications, while the Class H fuse provisions and fusible configuration help maintain system safety. With a 400 A rating and 600 V capability, it fits high-demand motor and line-side protection needs, making it a dependable centerpiece for industrial protection and electrical distribution strategies.
Product Information
Extended Description
DH365FPK Eaton: Eaton Enhanced visible blade single-throw safety switch, 400 A, NEMA 4, Painted steel, Class H, Three-pole, Three-wire, 600 V, Max Hp: 250, 350 hp (3PH @480/600 V), (2)#1/0-(2)300 kcmil; or (1)#1/0-(1)750 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH365FPK
UPC
782114357361
Product Length/Depth
57 in
Product Height
11 in
Product Width
27 in
Product Weight
123 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
Catalog Notes
Suitable for service entrance use with a neutral or ground lug kit installed
Enclosure
NEMA 4
Enclosure material
Painted steel
Fuse class provision
Class H
Fuse configuration
Fusible without neutral
Number Of Poles
Three-pole
Number of wires
3
Type
Heavy duty fusible safety switch
Amperage Rating
400A
HP rating - max
250, 350 hp (3PH @480/600 V)
NEMA rating
NEMA 4
Voltage rating
600 V
Product Category
Heavy Duty, Fusible without neutral
Feature → Business Impact → Application: The 400 A amperage rating supports large motors and feeders, delivering enhanced protection for high-power loads and reducing fuse-related outages. This translates to improved uptime in manufacturing lines and service entrances where reliability matters. Application: large HVAC, pumps, conveyors, and process equipment.Feature → Business Impact → Application: NEMA 4 painted steel enclosure provides weatherproof protection for indoor or outdoor installations, minimizing corrosion risk and extending lifecycle in dusty or wet environments. Application: outdoor electrical rooms, loading docks, and external switchgear housings.Feature → Business Impact → Application: Class H fuse provision and fusible without neutral configuration simplify electrical design, enabling straightforward retrofits and modular growth. Application: upgrade projects where quick integration with existing bus and conductor sizes is required.Feature → Business Impact → Application: Three-pole, three-wire design reduces wiring complexity and ensures balanced protection across phases, improving motor control reliability. Application: motor control centers and MCC feed sections where consistent switching performance is critical.Feature → Business Impact → Application: Large conductor compatibility (up to 750 kcmil Cu/Al) and documented HP ratings (250–350 hp at 480/600 V) support industrial-scale equipment, lowering the need for multiple, smaller switches. Application: high-horsepower motor drives and process lines in steel, chemical, and packaging facilities.
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FAQs
The DH365FPK is designed for service entrance use and supports neutral or ground lug kits. It is a three-pole, three-wire configuration rated for 400 A and 600 V, with UL Listing and a NEMA 4 enclosure for indoor or outdoor protection. This makes it a straightforward upgrade option for existing service entrances and new installations alike.
The unit provides max horsepower ratings of 250 to 350 hp at 480/600 V and accommodates conductor sizes up to (2) 300 kcmil Cu/Al or (1) 750 kcmil Cu/Al. This enables reliable protection for large motors and feeders without multiple devices, simplifying inventory and maintenance while ensuring safe startup and shutoff.
Yes. The DH365FPK uses a NEMA 4 painted steel enclosure designed for versatility in harsh environments. It supports outdoor and semi-exposed installations, resisting dust and moisture to protect internal switching components, minimizing corrosion risk and extending service life in demanding facilities.
The product carries UL Listing certification for safety and reliability. Warranty terms are Eaton’s standard policy: one year from installation or eighteen months from shipment, whichever occurs first. These protections help justify lifecycle costs and ensure support during early equipment operation.
Key factors include its 57 in depth, 27 in width, and 11 in height footprint, with a weight of 123 lb, which informs mounting and space planning. The unit’s rugged enclosure and multiple fuse configurations reduce downtime during maintenance and enable easier retrofits in MCCs or service entrances, supporting long-term ROI through reliability.