Eaton FNM-1/4 Fuse - Time-delay 0.25A 10kAIC @125V CE RoHS
Part Number: FNM-1/4
Quick Summary
The Eaton Bussmann FNM-1/4 fuse provides reliable overcurrent protection for small-control circuits in instrument panels and compact machinery. Engineers often struggle with nuisance trips and limited interrupt ratings that disrupt production and extend downtime. This fuse is CE marked and RoHS compliant, providing regulatory alignment while its dual element design supports dependable cycling. By combining a 0.25 A rating with a 10 kAIC interrupt at 125 V and ferrule-end connections, it delivers precise protection with minimal maintenance, helping you reduce spare-part stock and service calls. For panel builders and integrators, it harmonizes with standard Ferrule-end wiring, improving install efficiency and reliability across applicable control circuits.
Product Information
Extended Description
FNM-1/4 Eaton: Eaton Bussmann series FNM fuse, Time-delay, 0.25 A, Dual, Non-indicating, Ferrule end x ferrule end, 10 kAIC at 125 Vac, 35 AIC at 250 Vac, Nickel-plated bronze endcap, Standard, 250 V
Product Name
Eaton Bussmann series FNM fuse
Catalog Number
FNM-1/4
UPC
051712520072
EAN
5027590449410
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
0.25 A
Interrupt rating
10 kAIC at 125 Vac 35 AIC at 250 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-1/4
FNM-1/4~FNM-1-4~BUSS MIDGET FUSE
Time-delay protection is a key feature of the FNM fuse. This design reduces nuisance trips by accommodating legitimate inrush and motor-start transients, improving equipment uptime and process continuity. Application notes show it excels in small control panels and logic circuits where brief surges occur but fast clearing is essential. The result is more predictable protection without compromising safety. High interrupt ratings of 10 kAIC at 125 Vac and 35 AIC at 250 Vac define its fault-current handling capability without triggering upstream devices. Business impact includes fewer unplanned outages, longer fuse life, and reduced maintenance costs in mixed-voltage systems. Application areas include machine controls, PLC power rails, and lighting circuits within industrial environments. Ferrule-end x ferrule-end termination with nickel-plated bronze endcaps delivers secure, low-impedance connections that resist corrosion. This construction enhances reliability under vibration and thermal cycling and supports quick, repeatable installations in crowded enclosures. Application: panel rails and control cabinets where compact, durable fuses are needed to simplify field wiring. Dual-element construction paired with a non-indicating fuse element minimizes nuisance alarms and simplifies diagnostics. The absence of a visual indicator reduces failure points, while still delivering dependable protection under overload. Application: general protection across automation and instrumentation where space is limited and reliability is paramount. Compliance with CE marking and RoHS requirements aligns the FNM-1/4 with global regulatory expectations, easing cross-border sourcing and qualification. Standard packaging and Bussmann series compatibility support modular procurement and faster stocking. Application: worldwide panel builders seeking regulator-friendly protection devices that meet environmental and safety requirements. Industry context emphasizes superior overload and cycling capabilities in the Bussmann FNM family, delivering longer service life under intermittent loads common in automation equipment. Stocking the FNM-1/4 can simplify maintenance planning and reduce spare-part inventory by standardizing on a widely used ferrule-end fuse. In practice, performance consistency and ease of installation translate to measurable uptime gains.
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FAQs
To install the FNM-1/4, handle the fuse with care and ensure power is off. Use ferrule-end terminations to connect to compatible bus bars or terminal blocks, tightening ferrules to manufacturer-recommended torque. Verify that the panel wiring matches the 0.25 A rating and that the endcaps are clean and corrosion-free. A secure fit reduces contact resistance and helps in achieving consistent protective performance over time.
The FNM-1/4 is a 0.25 A time-delay fuse with 10 kAIC interrupt rating at 125 Vac and 35 AIC at 250 Vac, rated for 250 V. Use it for small-control circuits, PLC power rails, and lighting loads in industrial environments where brief inrush is common but precise protection is required. Its dual-element design supports reliable cycling in mixed-voltage applications.
Yes. Its time-delay characteristic accommodates startup surges in small motors and relays, while the 10 kAIC/35 AIC ratings protect against fault currents in 125 Vac and 250 Vac systems. The ferrule-end terminations and nickel-plated endcaps provide durable connections in crowded panel spaces, aligning with typical automation protection needs and long-term maintenance goals.
The FNM-1/4 is CE marked and RoHS compliant, ensuring regulatory alignment for global manufacturing. These certifications support safe market access, environmental compliance, and streamlined supplier qualification, which reduces risk during audits and helps standardize product selection across international projects.
The time-delay design minimizes nuisance trips, reducing production downtime and unneeded fuse replacements. Higher fault-current tolerance and durable ferrule-term connections translate to longer intervals between maintenance, lower spare-parts inventory, and faster field service, delivering a measurable uptick in equipment availability and lifecycle cost savings.