Eaton NOS-500 fuse - Class K5, 10 kAIC, 600V
Part Number: NOS-500
Quick Summary
Eaton NOS-500 fuse provides high-current protection for industrial power panels and control circuits. Engineers often struggle with nuisance blows and slow fault isolation when protecting high-load lines. This NOS-500 is CE marked and designed for 600 V systems with a 500 A rating and 10 kAIC interrupt capacity, offering reliable, non-current-limiting protection. For procurement teams, the one-time fuse form factor reduces maintenance and inventory complexity, while its pin-indicating feature supports quick status checks in the field. Overall, it delivers robust protection with predictable performance for electrical distribution in harsh industrial environments.
Product Information
Extended Description
NOS-500 Eaton: Eaton Bussmann Series Class K5 fuse, NOS, general purpose, non-current-limiting fuses, 500 A, one-time fuse, interrupting rating of 10 kA at 600 Vac
Product Name
Eaton Bussmann series NOS fuse
Catalog Number
NOS-500
UPC
051712315005
Product Length/Depth
13.38 in
Product Height
3.13 in
Product Width
3.13 in
Product Weight
4.76 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
500 A
Interrupt rating
10 kAIC at 600 Vac
Voltage rating
600 V
Packaging type
Standard
Class
Class H Class K5
Fuse indicator
Non-indicating
Quantity
1
Special features
Pin-indicating
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Class H (K) Fuses Data Sheet no. 1030
Feature: 500 A amperage rating enables reliable protection for heavy-load applications such as motor feeders and main feeders in industrial control panels. Business Impact: minimizes risk of equipment damage and unplanned downtime, improving line uptime and maintenance planning. Application: suitable for power distribution circuits and general purpose protection in harsh plant environments. Feature: 10 kAIC interrupt rating at 600 VAC enhances fault-current handling, reducing the likelihood of cascading failures during short circuits. Business Impact: faster fault isolation and safer maintenance windows, lowering repair costs. Application: MCCs, switchgear, and high-current feeders where robust interruption capability is essential. Feature: Class H / Class K5 construction with non-current-limiting behavior provides predictable trip characteristics. Business Impact: simplifies coordination with upstream protection devices and avoids nuisance tripping in steady-state loads. Application: standard protection in commercial and industrial electrical systems. Feature: Pin-indicating capability improves field verification and status checks during installation and maintenance. Business Impact: reduces commissioning time and human error, enhancing overall safety. Application: on-site fuse verification in control cabinets and distribution panels. Feature: Standard packaging and Bussmann compatibility ensure straightforward replacements and stock management. Business Impact: lowers total cost of ownership through widely available parts and reduced downtime caused by part mismatch. Application: spare parts strategy for maintenance teams. Feature: CE marking confirms compliance with essential health and safety requirements for European installations. Business Impact: facilitates cross-border procurement and reduces compliance risk. Application: Europe-based projects and multinational facilities.
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FAQs
The NOS-500 is designed for Bussmann Series Class H / Class K5 fuse holders and standard packaging. Use compatible Bussmann fuse blocks and cabinets intended for non-current-limiting Class K fuses, ensuring the mounting and contact interfaces match the 13.38 inch overall length and the 3.13 inch cross-section. This compatibility minimizes installation time and reduces the risk of misalignment during panel assembly.
NOS-500 is rated for 500 A continuous current, with a voltage rating of 600 V and an interrupt rating of 10 kAIC at 600 VAC. These ratings make it suitable for high-load general protection in electrical distribution panels, motor feeders, and control circuits where high fault current could occur but rapid clearing is essential to protect downstream equipment.
Yes, the NOS-500 is designed for general protection in industrial power systems, including motor control centers and distribution panels. Its non-current-limiting behavior provides predictable protection without rapid current limitation, which is ideal for applications requiring coordination with upstream protection and reliable interrupt capability in 600 V networks.
The NOS-500 is CE marked, indicating compliance with essential health, safety, and environmental requirements for many markets. While the data sheet emphasizes this certification, always verify regional standards for your installation. The fuse also supports Bussmann Series guidelines for compatibility and safe operation in standard industrial environments.
The NOS-500’s one-time fuse design reduces maintenance cycles and stocking complexity, lowering long-term operating costs. The pin-indicating feature aids quick status checks, minimizing downtime during inspections. Its high interrupt rating and robust 600 V specification enable reliable protection, helping to prevent costly equipment damage and maintain production continuity.