Eaton FNM-4 Fuse - 4 A, 250 V, 10 kAIC @125 Vac
Part Number: FNM-4
Quick Summary
The Eaton FNM-4 fuse protects electrical circuits by interrupting overloads in control panels and power distribution enclosures. Maintenance teams frequently face nuisance fuse replacements during short repair windows and uncertain cycling behavior. CE marked and RoHS compliant, this Bussmann series fuse also features nickel-plated bronze endcaps for durable, corrosion-resistant service. Its dual-element design and ferrule-end connections simplify installation and improve fault isolation in dense panel assemblies. With a 4 A rating at 250 V and robust interrupt capabilities, it helps minimize downtime while meeting regulatory and safety requirements. Engineers benefit from a compact footprint that supports space-constrained installations and predictable maintenance planning.
Product Information
Extended Description
FNM-4 Eaton: Eaton Bussmann series FNM fuse, 4 A, Dual, Non-indicating, Ferrule end x ferrule end, 10 kAIC at 125 Vac, 200 AIC at 250 Vac, Nickel-plated bronze endcap, Standard, 250 V
Product Name
Eaton Bussmann series FNM fuse
Catalog Number
FNM-4
UPC
051712520409
EAN
5027590449540
Product Length/Depth
0.39 in
Product Height
1.44 in
Product Width
0.39 in
Product Weight
0.2 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
4 A
Interrupt rating
200 AIC at 250 Vac 10 kAIC at 125 Vac
Voltage rating
250 V
Material
Nickel-plated bronze endcap
Number of elements
Dual
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Special features
Superior overload and cycling capabilities
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - FNM-4
FNM-4~BUSS MIDGET FUSE
Datasheet - FNQ-30
Feature: 4 A, 250 V rating with 200 AIC at 250 Vac and 10 kAIC at 125 Vac. Business Impact: Provides reliable circuit protection for load centers and control panels, reducing the risk of downstream damage and unplanned downtime. Application: Ideal for small-control circuitry and 250 V systems where precise interruption is critical, improving overall equipment availability. Feature: Dual element with ferrule end x ferrule end connections and nickel-plated bronze endcaps. Business Impact: Delivers a secure, corrosion-resistant termination that supports long service life and repeatable maintenance. Application: Suited for industrial environments with frequent cycling and vibration where endcap integrity matters. Feature: Non-indicating, standard packaging with superior overload and cycling capabilities. Business Impact: Minimizes nuisance trips while maintaining strong protection against short circuits, enabling planned maintenance windows. Application: Frequent cycling equipment and machinery control loops benefit from stable protection and reduced parts replacement. Feature: CE Marked and RoHS Compliant. Business Impact: Ensures regulatory alignment and sustainability compliance across European operations, reducing product qualification time. Application: Suitable for DIN-rail panel assemblies and mixed-industry deployments where standards conformance matters. Feature: Compact physical footprint and Bussmann series lineage. Business Impact: Enables easier integration in tight control panels and leverages legacy compatibility with Bussmann midget fuse families. Application: Panel builders and systems integrators gain faster installation and predictable spare part inventories.
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FAQs
The FNM-4 uses ferrule-end terminations with nickel-plated bronze endcaps, designed for secure, corrosion-resistant connections. Ensure ferrule crimp ends are correctly sized for your conductors and mount in compatible control panels or enclosures. The dual-element design supports reliable cycling, while standard packaging simplifies stocking and replacement in maintenance activities.
The fuse is rated for 4 A at 250 V, with an interrupt rating of 200 AIC at 250 Vac and 10 kAIC at 125 Vac. These ratings provide robust protection for low-to-medium current circuits and ensure safe disconnection under fault conditions, aligning with common industrial panel requirements.
Yes. The FNM-4 is CE marked and RoHS compliant, meeting European regulatory and environmental requirements. This makes it suitable for international deployments and helps streamline compliance documentation for panel assemblies and equipment meant for global markets.
This fuse is commonly used in control panels, power distribution enclosures, and machinery circuits requiring reliable overload protection at 250 V. Its compact form and ferrule-end connections make it a good fit for dense panel layouts and replaceable protection devices in automation and electrical subsystems.
The FNM-4 provides predictable protection with minimal nuisance trips due to its overload and cycling capabilities, reducing unplanned downtime. Its robust endcaps and compact footprint simplify installation and spare-part management, contributing to lower maintenance costs and steadier operation for production lines and critical equipment.