Eaton NOS-1 Fuse - Class H, 50 kAIC at 600V
Part Number: NOS-1
Quick Summary
The Eaton NOS-1 fuse is a general-purpose Class H fuse for protecting industrial control circuits. In the field, selecting a non-current-limiting fuse can complicate fault isolation and extend machine downtime. With a 1 A rating and 600 V capability, it provides reliable protection for low-current control loads and power circuits. CE marking, a 50 kAIC interrupt rating at 600 Vac, and Bussmann series design ensure robust coordination and safety. Its ferrule-end construction, pin-indicating features, and standardized dimensions simplify installation and diagnostics in control panels. This combination reduces maintenance costs and supports scalable protection strategies across automation and electrical distribution environments.
Product Information
Extended Description
NOS-1 Eaton: Eaton Bussmann Series Class K5 fuse, NOS, general purpose, non-current-limiting fuses, 1 A, one-time fuse, interrupting rating of 50 kA at 600 Vac
Product Name
Eaton Bussmann series NOS fuse
Catalog Number
NOS-1
UPC
051712310017
EAN
5027590453837
Product Length/Depth
0.81 in
Product Height
5 in
Product Width
0.81 in
Product Weight
0.153 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
1 A
Interrupt rating
50 kAIC at 600 Vac
Voltage rating
600 V
Packaging type
Standard
Class
Class H
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
Special features
Pin-indicating
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Class H (K) Fuses Data Sheet no. 1030
The NOS-1 is a non-current-limiting Class H fuse that delivers predictable interruption for general protection in control panels, machines, and power circuits. It supports clear fault isolation, minimizing downtime and maintenance expenses. The 50 kAIC interrupt rating at 600 Vac enables safe performance under short-circuit conditions while coordinating with upstream protection devices. Ferrule-end connections offer reliable, vibration-resistant terminations suited to automated systems and panel builders. Pin-indicating features speed diagnostics during preventive maintenance, reducing troubleshooting time. Compatibility with standard Bussmann catalogs and 0.81 in by 5 in form factor enables straightforward retrofits and panel replacements. The 1 A rating ensures protection of sensitive control electronics without nuisance tripping, improving overall line efficiency and reliability.
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FAQs
NOS-1 uses ferrule-end connections and standard Bussmann form-factor (0.81 in width, 5 in height). It fits typical control panels and enclosures designed for Class H branch fuses. Verify panel cutouts and terminal spacing to ensure a secure crimp connection and compliant mounting.
NOS-1 is rated at 1 A with a voltage rating of 600 V and an interrupt rating of 50 kAIC at 600 Vac. It is non-current-limiting, meaning it provides protection without fast-acting current truncation, suitable for general protection in industrial circuits.
Yes, as a general-purpose Class H fuse it protects control circuits and associated loads in machinery and panels. For motor protection, coordinate NOS-1 with upstream fuses and contactors to maintain selective protection and minimize nuisance trips.
NOS-1 is CE marked, indicating compliance with European safety standards. It follows Bussmann series design guidelines for general protection fuses, and the product is designed for reliable performance in industrial environments with standard isolation and installation practices.
NOS-1 is a one-time fuse (non-repairable). After a trip or fault, replace with another NOS-1 of the same rating. The non-indicating fuse indicator requires visual inspection or a panel test to confirm operation status, supporting predictable maintenance schedules.