Eaton NOS-400 Fuse for Protection - 10 kAIC at 600 Vac
Part Number: NOS-400
Quick Summary
The Eaton NOS-400 fuse is a general-purpose protection device that safeguards electrical panels and power circuits in industrial settings. Engineers often struggle to match amperage, interrupt rating, and form factor across multiple panels, leading to risky substitutions and downtime. This device carries CE marking and reflects Class K5 construction, with a 400 A rating, 10 kAIC interrupt capability, and a 600 V rating for robust safety. By aligning with standard blade-end configurations, it streamlines installation and reduces spare parts complexity, while supporting reliability and regulatory compliance in critical automation environments.
Product Information
Extended Description
NOS-400 Eaton: Eaton Bussmann Series Class K5 fuse, NOS, general purpose, non-current-limiting fuses, 400 A, one-time fuse, interrupting rating of 10 kA at 600 Vac
Product Name
Eaton Bussmann series NOS fuse
Catalog Number
NOS-400
UPC
051712314008
Product Length/Depth
11.63 in
Product Height
2.59 in
Product Width
2.59 in
Product Weight
2.82 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
400 A
Interrupt rating
10 kAIC at 600 Vac
Voltage rating
600 V
Packaging type
Standard
Class
Class K5 Class H
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Quantity
1
Special features
Pin-indicating
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Bussmann series Fuseology
Bussmann series Class H (K) Fuses Data Sheet no. 1030
Feature: The NOS fuse is Class K5, general-purpose and non-current-limiting. Business impact: Delivers reliable overcurrent protection with predictable coordination, minimizing nuisance trips in standard control circuits. Application: Suited for general protection in industrial panels, motor feeders, and distribution blocks. Feature: 400 A amperage rating paired with 10 kAIC interrupt rating at 600 Vac. Business impact: Protects feeders from short-circuit energy while limiting arc exposure, improving safety and reducing equipment damage. Application: Useful in main disconnects and high-load circuits across manufacturing lines. Feature: Blade end x blade end connection with standard packaging. Business impact: Eases installation in Bussmann fuse blocks and compatible holders, saving assembly time and reducing wiring errors. Application: Ideal for rapid swaps in retrofit projects and new installations. Feature: Pin-indicating and non-indicating fuse indicators. Business impact: Simplifies status checks during maintenance, lowering downtime and inspection effort. Application: Field service teams benefit from quick visual confirmation in control cabinets.
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FAQs
The NOS-400 uses blade end x blade end connections designed for standard Bussmann fuse blocks. Ensure the holder matches a 400 A, 600 V rating and that the mounting footprint aligns with your panel cutout. With the standard length of 11.63 in and width of 2.59 in, verify clearance and lead routing before seating the fuse to avoid contact with adjacent components.
NOS-400 is rated for 400 A with a 10 kAIC interrupt rating at 600 Vac. The 600 V voltage rating and non-current-limiting behavior mean it provides robust short-circuit protection for high-load circuits while allowing full fault current to be interrupted safely. This combination supports predictable protection coordination in general-purpose applications.
Yes. The NOS-400 is designed as a general-purpose, non-current-limiting fuse suitable for power distribution panels, control cabinets, and motor feeders where standard protection is required. Its Class K5 designation helps unify protection standards across equipment, simplifying design reviews and stocking. For high-energy or highly-accelerated faults, confirm compatibility with your upstream protection scheme.
The NOS-400 is CE marked, indicating compliance with European safety standards. It is part of the Bussmann Series Class K5 family and supports global deployment in panels that require standardized, compliant protection components. Always verify local regulatory requirements and catalog specifications for your specific jurisdiction.
Being a one-time fuse with a clear blade-end connection, the NOS-400 simplifies field replacement and reduces downtime during maintenance. The standardized form factor lowers stocking complexity and procurement lead times. Over the life of a panel, predictable performance minimizes unplanned outages, contributing to lower maintenance costs and improved uptime for automated processes.