Eaton NOS-300 Fuse - 10 kAIC at 600 Vac Class H
Part Number: NOS-300
Quick Summary
The Eaton NOS-300 fuse provides 300 A protection for industrial control panels and motor circuits. Engineers often wrestle with nuisance trips and undersized protection that disrupts uptime and productivity. This NOS fuse carries CE marking for European safety compliance, and RoHS considerations support global deployments. Its Class H, non-current-limiting design features a 10 kAIC interrupt rating at 600 Vac, delivering reliable protection for high-demand applications. The Fuse's blade-end connections simplify installation in standard Bussmann series holders, while its compact 11.63 in length fits compact control panels. Together with Eaton's reliability, this fuse reduces downtime and maintenance costs, offering predictable protection for critical loads.
Product Information
Extended Description
NOS-300 Eaton: Eaton Bussmann Series Class K5 fuse, NOS, general purpose, non-current-limiting fuses, 300 A, one-time fuse, interrupting rating of 10 kA at 600 Vac
Product Name
Eaton Bussmann series NOS fuse
Catalog Number
NOS-300
UPC
051712313001
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
300 A
Interrupt rating
10 kAIC at 600 Vac
Voltage rating
600 V
Packaging type
Standard
Class
Class H
Connection
Blade end x blade end
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
High-current protection with robust interrupt rating delivers reliable safeguarding for 300 A loads in motor starters and distribution panels, reducing downtime and potential equipment damage. The Class H, non-current-limiting design provides predictable fuse behavior under short, high-current faults, enabling safer startup sequences and easier coordination with upstream protection. Blade-end x blade-end connections and standard packaging streamline installation in existing Bussmann series holders, cutting commissioning time and minimizing field wiring errors. The compact form factor—11.63 in length with 2.59 in width and height and a 2.82 lb weight—facilitates panel planning and enclosure use, improving space utilization in control cabinets. CE marking and RoHS-aligned materials support global deployments while maintaining regulatory compliance, essential for multi-site operations. Pin-indicating features aid maintenance verification and faster replacement in dense electrical assemblies, boosting overall maintenance efficiency.
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FAQs
The NOS-300 is a blade-end, Class H general-purpose fuse designed for 600 V systems. It fits standard Bussmann series holders in motor control centers, distribution panels, and other industrial power assemblies, enabling straightforward field replacement and panel integration.
The 10 kAIC interrupt rating indicates the fuse can safely interrupt high-energy fault currents up to 10 kiloamps without sustaining damage. This reduces the risk of collateral equipment failure and improves protection coordination in 600 V industrial circuits, particularly where large motors or transformers are present.
Yes. The NOS-300 is rated for 600 V and 300 A, making it appropriate for general-purpose protection in industrial distribution panels and motor control circuits. Its non-current-limiting design is suitable where time-delay clearing is acceptable for the load and protection strategy.
The NOS-300 carries CE marking, indicating compliance with European safety standards. Additional RoHS-related considerations are supported for restricted-substance compliance, aligning with global deployments and regulatory expectations for modern electrical protection devices.
The NOS-300’s durable Class H design, high interrupt rating, and straightforward blade-end installation reduce maintenance and replacement downtime. Its standardized dimensions and compatibility with Bussmann series hardware simplify spare parts inventory and field service, delivering lower lifecycle costs in industrial power protection applications.