Eaton FWX-300A High Speed Fuse - 200 kAIC Vac CE RoHS
Part Number: FWX-300A
Quick Summary
Eaton FWX-300A high speed fuse protects critical power circuits in industrial automation and control panels. Engineers frequently contend with nuisance trips and hidden faults from fast-switching drives, leading to costly downtime. This device carries CE marking, RoHS compliance, and UL recognition with CSA certification, supporting global deployments. With 600 V ratings and 300 A RMS capacity, plus flexible blade-end and stud mounting options, it simplifies installation while delivering reliable protection. Its compact 4.3 in length and 1.62 in width help fit crowded panel layouts while keeping heat to a minimum, aided by a modest 32 W watt loss.
Product Information
Extended Description
FWX-300A Eaton: Eaton Bussmann series FWX high speed fuse, 600V, 300A RMS, 200 kAIC Vac, 50 kAIC at 250 Vdc, Non Indicating, High speed fuse, Blade end X blade end, Stud
Product Name
Eaton Bussmann series FWX high speed fuse
Catalog Number
FWX-300A
UPC
051712150699
Product Length/Depth
4.3 in
Product Height
1.63 in
Product Width
1.62 in
Product Weight
0.46 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Certifications
CSA Certified UL Recognized
Amperage Rating
300A RMS
Interrupt rating
200 kAIC Vac 50 kAIC at 250 Vdc
Voltage rating
600 V
Watt losses
32 W
Packaging type
Standard
Connection
Blade end x blade end
Fuse indicator
Non Indicating
Mounting method
Stud
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - FWX-300A
FWX-300A~BUSS HIGH SPEED FUSE
FWX-300A~BUSS HIGH SPEED FUSE
Datasheet - FNQ-30
Feature – 600 V rating, 300 A RMS current, 200 kAIC VAC/50 kAIC at 250 VDC interrupt rating → Business impact – fast fault clearance reduces arc damage and downtime; Application – drives, power distribution, switchgear in manufacturing. Feature – blade end x blade end connections with stud mounting → Business impact – flexible installation and easy retrofits; Application – control panels and switchgear enclosures in limited space applications on existing equipment. Feature – non-indicating indicator → Business impact – lower upfront cost and simpler integrations by using system-level indicators; Application – general protection in crowded cabinets. Feature – CE, RoHS, UL Recognized, CSA Certified → Business impact – global compliance, faster qualification, improved supplier audits; Application – OEMs deploying internationally. Feature – compact form factor 4.3 in L × 1.62 in W × 1.63 in H and 0.46 lb weight; 32 W losses → Business impact – minimal panel heat, easier handling; Application – space-constrained panels in automation lines.
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FAQs
FWX-300A is a high-speed fuse designed to protect electrical circuits in industrial automation and motor control environments. It is rated for 600 V and 300 A RMS with an interrupt rating of 200 kAIC at AC, and 50 kAIC at 250 VDC for DC fault conditions. This makes it ideal for drives, power distribution, and switchgear.
FWX-300A uses blade end x blade end connections and can be mounted with a stud, offering installation flexibility in new panels or retrofits. This compatibility supports common Eaton Bussmann fuse holders and standard control enclosures, reducing the need for special adapters or new hardware in limited space applications on existing equipment.
Key ratings include voltage 600 V, amperage 300 A RMS, and interrupt ratings of 200 kAIC Vac and 50 kAIC at 250 VDC. It also lists watt losses of 32 W, confirming it remains within thermal limits in typical panel installations. This ensures reliable protection without excessive heat under varying load conditions.
Yes. FWX-300A is CE marked and RoHS compliant, and it is UL Recognized and CSA Certified, reflecting adherence to global safety and performance standards. This certification set supports OEMs seeking compliant components for international markets, reduces qualification time, and simplifies supplier audits. Having these marks helps meet industry guidelines such as IEC and UL standards in control systems.
To maximize longevity, ensure correct ampere selection, use compatible holders, torque studs to manufacturer specs, and verify correct gap and alignment in fuse blocks. Consider offering remote indicators if needed for visibility, and replace only with FWX-300A with identical ratings to maintain system integrity. Regular inspections during preventive maintenance help ensure fast response and minimize downtime.