Eaton NOS-25 Fuse - Class H Non-Current-Limiting 50 kAIC @ 600V
Part Number: NOS-25
Quick Summary
The Eaton NOS-25 fuse provides reliable general-purpose protection for control panels and motor circuits. Designers often struggle with selecting a fuse that matches system voltage, interrupt rating, and mounting constraints, leading to unexpected outages. This Class H, non-current-limiting NOS-25 is CE marked with a 25 A rating and a 50 kAIC interrupt rating at 600 Vac, featuring ferrule-end connections. Its compact 5 in length and 0.81 in width fit space-constrained enclosures, while a pin-indicating option simplifies installation and verification. For teams standardizing on Bussmann protection lineage, the NOS-25 delivers predictable protection, streamlined procurement, and reduced downtime across electrical protection & circuit control applications.
Product Information
Extended Description
NOS-25 Eaton: Eaton Bussmann Series Class K5 fuse, NOS, general purpose, non-current-limiting fuses, 25 A, one-time fuse, interrupting rating of 50 kA at 600 Vac
Product Name
Eaton Bussmann series NOS fuse
Catalog Number
NOS-25
UPC
051712310253
EAN
5027590065528
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.165 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
25 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
Feature → Business Impact → Application: The NOS-25 is a Class H, non-current-limiting fuse rated at 25 A with a 50 kAIC interrupt rating at 600 Vac, featuring ferrule-end connections. This configuration provides robust, predictable protection for general-purpose circuits while offering quick, reliable installation in control panels and motor circuits. Application: suitable for industrial controls, small drives, and panel protection where space is at a premium. Feature → Business Impact → Application: Pin-indicating capability as a special feature (while the fuse indicator is non-indicating) aids correct orientation and reduces wiring errors during panel assembly. Application: ideal for technicians performing field replacements or retrofits in automation cabinets. Feature → Business Impact → Application: Standard packaging and stock-keeping (10 per pack) support procurement efficiency and spare-part readiness, minimizing downtime in maintenance cycles. Application: reduces maintenance backlog in busy 24/7 facilities. Feature → Business Impact → Application: 5 in length with 0.81 in width and ferrule-end x ferrule-end termination enables compatibility with common ferrule crimp methods and existing Bussmann/NEMA-compatible holders. Application: expedites installation in legacy equipment and modern control systems. Feature → Business Impact → Application: High interrupt rating ensures safe fault-clearing in moderate fault currents, aligning with typical industrial distribution panels and machinery feeds. Application: protection for 600 V systems and general control circuits. Feature → Business Impact → Application: Pin-indicating feature (where used) supports faster verification of correct fuse orientation during commissioning. Application: reduces commissioning time in panel builds. Addressing common objections: While this NOS fuse is non-current-limiting, it excels as a reliable general-purpose protector for circuits where nuisance current-limiting is unnecessary, and where a standard, easy-to-replace 25 A fuse delivers consistent protection and predictable clearing in Bussmann-driven panels.
Get a Quick Quote for a Eaton NOS-25
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton NOS-25?
Enquire Now
FAQs
To install the NOS-25, ensure your panel accepts ferrule-end fuses and that the circuit current does not exceed 25 A. Use proper crimp tooling to attach ferrules, insert the fuse with the correct orientation, and verify a secure mechanical fit. The pin-indicating feature aids alignment, while the non-indicating indicator means no blown-state indication on the fuse itself.
Key specs include a 25 A amperage rating, 600 V voltage rating, and a 50 kAIC interrupt rating at 600 Vac. It is a Class H, non-current-limiting fuse with ferrule-end connections and a 5 inch length by 0.81 inch width footprint, designed for general-purpose protection in industrial controls.
NOS-25 is a general-purpose, non-current-limiting fuse suitable for protection in control panels and small-to-medium circuits. For motor protection, if motor inrush is a concern, evaluate whether a current-limiting fuse or a dedicated motor-protection device is more appropriate. Always size to the motor’s running current and upstream protective coordination.
The NOS-25 is CE Marked, signaling conformance with essential health and safety requirements for many markets. This certification supports regulatory compliance in European installations and aligns with international safety standards for general-purpose protection devices used in electrical protection and circuit control.
NOS-25 fuses are one-time fuses packaged in sets of 10, which streamlines stocking and reduces downtime due to stockouts. Their standard form factor and ferrule-end termination simplify replacements, lowering maintenance labor time and improving mean time to repair (MTTR) in busy industrial environments.