Eaton Bussmann FNA-3-1/2 Fuse - 3.5A Time-Delay, 250V CE RoHS
Part Number: FNA-3-1/2
Quick Summary
The Eaton Bussmann FNA fuse protects inductive circuits, delivering time-delay protection for industrial controls. Engineers often face nuisance trips and insufficient overload handling when surges occur in motors and power supplies. It is CE Marked and RoHS compliant, designed to meet European safety requirements, with high interrupt ratings for reliable performance. The product’s dual-element design and compact form support easy integration in control panels, while its standard packaging keeps installation efficient. This combination helps reduce downtime, extend component life, and improve overall machine availability in automation environments.
Product Information
Extended Description
FNA-3-1/2 Eaton: Eaton Bussmann series FNA fuse, Time-delay fuse, Inductive load circuits, Electronic circuits, 3.5 A, Dual, Non-indicating, 200 kAIC at 250 Vac, 10 kAIC at 125 Vac, Silver-plated pin, Standard, 250 V
Product Name
Eaton Bussmann series FNA fuse
Catalog Number
FNA-3-1/2
UPC
051712713559
EAN
5027590060097
Product Length/Depth
0.35 in
Product Height
1.46 in
Product Width
0.35 in
Product Weight
0.1 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
3.5 A
Interrupt rating
10 kAIC at 125 Vac 200 kAIC at 250 Vac
Voltage rating
250 V
Material
Silver-plated pin
Number of elements
Dual
Packaging type
Standard
Fuse indicator
Non-indicating
Special features
Superior overload and cycling capabilities
FNA-3-1/2~FNA-3-1-2~FUSETRON DUAL-ELEMENT INDICATING
FNA-3-1/2~FNA-3-1-2~FUSETRON DUAL-ELEMENT INDICATING
Eaton Specification Sheet - FNA-3-1/2
Feature → Business Impact → Application: The FNA-3-1/2 uses a dual-element time-delay design that tolerate temporary surges without nuisance trips, delivering smoother cycling and fewer unnecessary outages. This translates to higher equipment uptime and reduced maintenance costs in automated lines, especially where motors and solenoids start under load. Application-wise, it’s a strong fit for motor starters, drives, and electronic controls in manufacturing and process facilities. Feature → Business Impact → Application: With a 3.5 A rating and 250 V operating voltage, the fuse protects sensitive electronics while enabling safe, compact installations in panelboards and control cabinets. This enables smaller panel footprints and easier component sourcing for automation projects. Feature → Business Impact → Application: The high interrupt ratings—200 kAIC at 250 Vac and 10 kAIC at 125 Vac—offer robust fault protection, reducing the risk of arc faults and collateral damage in high-energy circuits. This is critical for conveyor systems, packaging lines, and robotics. Feature → Business Impact → Application: Silver-plated pins and standard packaging provide reliable, low-resistance contacts and straightforward stocking, improving installation reliability and field service efficiency in machine rebuilds and retrofits. Feature → Business Impact → Application: CE Marking and RoHS compliance reassure compliance managers and procurement teams, while the non-indicating fuse indicator simplifies status assessment during maintenance checks. This supports audit readiness and helps businesses meet regulatory expectations in European operations.
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FAQs
The FNA-3-1/2 is ideal for inductive loads in motor starters, relays, drives, and power supplies. Its time-delay characteristic accommodates inrush currents typical of motors and electronic circuits, reducing nuisance trips while maintaining protection. It is commonly used in control panels and automation cabinets where compact protection is required without sacrificing reliability.
The fuse provides a 3.5 A amperage rating with a 250 V voltage rating. It offers 200 kAIC interrupt rating at 250 Vac and 10 kAIC at 125 Vac, enabling robust protection against short-circuits and faults in higher-energy industrial circuits, while keeping protection within safe limits for sensitive electronics.
Yes. The fuse is CE Marked and RoHS Compliant, aligning with European safety and environmental requirements. This makes it suitable for European equipment and installations, and simplifies regulatory compliance in shared inventory environments and cross-border supply chains.
The dual-element design enhances overload tolerance and cycling durability, reducing nuisance trips during startup and operation. This translates to fewer service interventions, lower maintenance costs, and longer interval times between replacements in demanding automation applications.
Choose the standard packaging variant with silver-plated pins for reliable contact and easy seating in sockets or terminal blocks. Ensure adequate clearance and heat dissipation for continuous operation near high-current devices, and verify RoHS/CE compliance in the panel’s electrical sourcing to streamline audits and procurement.