Eaton NOS-20 Fuse - 50 kAIC at 600 Vac CE Marked
Part Number: NOS-20
Quick Summary
The Eaton NOS-20 fuse provides general-purpose protection for low-to-medium power circuits in industrial control panels. Engineers often struggle with nuisance trips and inconsistent interruption during faults, which can lead to unexpected downtime and maintenance costs. This CE marked fuse belongs to Eaton Bussmann Series Class H and delivers a robust 50 kAIC interrupt rating at 600 Vac, making it suitable for demanding electrical protection tasks. By combining reliable protection with straightforward installation, it supports faster commissioning, easier spares management, and improved system uptime for your control enclosures and machinery. In addition to its core function, the NOS-20 aligns with common long-tail needs such as ferrule end connections and compact form factors for panel layouts.
Product Information
Extended Description
NOS-20 Eaton: Eaton Bussmann Series Class K5 fuse, NOS, general purpose, non-current-limiting fuses, 20 A, one-time fuse, interrupting rating of 50 kA at 600 Vac
Product Name
Eaton Bussmann series NOS fuse
Catalog Number
NOS-20
UPC
051712310208
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.14 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
20 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
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: 20 A Amperage Rating → Business Impact → Application. The 20 A rating provides precise protection for low-to-medium power circuits, reducing the risk of nuisance trips while guarding sensitive control electronics. Application: control panels, small drives, and equipment feeders where careful current limiting is essential. Feature: 50 kAIC Interrupt Rating at 600 Vac → Business Impact → Application. High interrupt capacity ensures safe fault clearance for high-energy faults without arcing, improving equipment protection and operator safety. Application: industrial machinery, motor starters, and branch circuits in harsh environments. Feature: General-purpose, non-current-limiting fuse → Business Impact → Application. Simple, predictable protection without fast-acting current limiting, lowering false trips in steady-state overload conditions. Application: general electrical protection where fast clearing is not required. Feature: Class H designation with ferrule end x ferrule end → Business Impact → Application. Robust, easy-to-mield connections support reliable installation and long-term durability. Application: backplane or panel wiring with standard ferrule terminations. Feature: Pin-indicating capability vs non-indicating indicator → Business Impact → Application. Visual confirmation aids maintenance planning and reduces downtime during fuse replacements. Application: fast status checks in busy control rooms. Feature: 5 in length and compact 0.81 in square footprint → Business Impact → Application. Space-efficient design enables dense panel layouts and easier replacement stock management. Application: compact control cabinets and equipment enclosures. Feature: 10-count packaging with standard packaging type → Business Impact → Application. Ready-to-stock increments simplify procurement and reduce downtime during outages. Application: mass deployment across multiple panels and sites. Feature: CE Marked compliance → Business Impact → Application. Ensures EU market safety alignment and smoother cross-border installations. Application: European projects and multinational installations requiring certified components.
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FAQs
The NOS-20 uses ferrule end x ferrule end terminations and measures 5 in long with a compact 0.81 in square footprint. It fits standard panel rails and busbar layouts designed for Bussmann Class H fuses, enabling quick, secure installation with minimal tooling and compatible ferrule crimps.
NOS-20 is rated 20 A with a 50 kAIC interrupt rating at 600 Vac. This means it can safely interrupt high-energy faults at up to 600 V, protecting downstream devices without nuisance tripping under normal transients, suitable for general-purpose protection in control panels and branch circuits.
Ideal for general protection in control panels, small motor controllers, and machinery wiring where non-current-limiting protection is acceptable. Its Class H construction and non-indicating design simplify replacement in standard enclosures while ensuring reliable fault clearance on 600 Vac systems.
The NOS-20 is CE Marked, indicating compliance with EU safety standards. While UL or IP ratings are not specified in the provided data, CE marking confirms alignment with European electrical safety requirements for general-purpose fuses.
With a 10-per-pack quantity and a standard ferrule-end design, NOS-20 simplifies stocking and replacements across multiple panels or sites. Its reliable 50 kAIC interrupt capability minimizes costly faults, reducing downtime and maintenance overhead associated with fuse failures in industrial electrical protection schemes.