Eaton FWX-275A High Speed Fuse - 200 kAIC Vac
Part Number: FWX-275A
Quick Summary
The Eaton FWX-275A high speed fuse delivers fast-acting overcurrent protection for industrial control panels and motor drives. It addresses the pain of nuisance trips and prolonged fault recovery by clearing faults quickly and reliably. This device is RoHS compliant and designed to meet demanding electrical protection standards, with an interrupt rating of 200 kAIC Vac and 50 kAIC at 250 Vdc. Even with its high performance, the FWX-275A remains compact and easy to install, reducing panel space and wiring complexity. With blade-end x blade-end connections and stud mounting, it supports flexible installation in new builds or upgrades while aligning with Bussmann FWX series protection strategies. Its non-indicating design keeps panel layouts tidy and simplifies field diagnostics.
Product Information
Extended Description
FWX-275A Eaton: Eaton Bussmann series FWX high speed fuse, 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-275A
UPC
051712153980
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
Contact factory RoHS Compliant
Interrupt rating
200 kAIC Vac 50 kAIC at 250 Vdc
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-275A
Bussmann series FWX 35-2500A high speed fuses data sheet no. 720005
Bussmann series FWX 35-2500A high speed fuses data sheet no. 720005
Datasheet - FNQ-30
200 kAIC Vac interrupt rating provides a wide fault-current margin, enabling rapid fault clearance in heavy-use AC circuits. This translates to reduced arc energy, less collateral damage, and longer equipment life in drives and feeders. The FWX-275A is well-suited for motor control centers and power distribution assemblies where swift isolation is critical. 50 kAIC at 250 Vdc expands protection for DC buses in drives and battery-connected power structures, helping prevent DC arc burns and protecting semiconductor devices during switching transients. Blade end x blade end connections combined with stud mounting simplify installation and replacement in existing panel blocks, reducing retrofit time and minimizing rewiring while enabling flexible protection strategy alignment. Compact dimensions—4.3 in L, 1.63 in H, 1.62 in W—and a weight of 0.46 lb support installation in crowded panels and compact fuse blocks. RoHS compliance and standard packaging ease procurement and regulatory alignment, while the non-indicating design keeps wiring clean and supports scalable protection with Eaton Bussmann FWX components.
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FAQs
FWX-275A uses blade end x blade end connections with stud mounting, making it compatible with standard Bussmann FWX blocks and panel boards. Ensure there is adequate clearance for the fuse's 4.3 in length and footprint, and verify that the enclosure supports the fuse's non-indicating profile. Align wiring with existing harnesses to minimize rework and reference the Eaton datasheet for mounting guidelines and safety notes.
FWX-275A provides 200 kAIC Vac interrupt capability for AC faults and 50 kAIC at 250 Vdc for DC bus protection. This enables rapid fault clearance, reducing arc energy and downstream damage in drives and feeders. The device is suitable for motor controllers, power distribution units, and other high-energy circuits requiring dependable fast-acting protection.
Yes. The FWX-275A is designed to protect motor drives and associated power systems by rapidly isolating faults. Its compact form factor fits crowded panels, and its blade-end connections with stud mounting support flexible installation. Verify coordination with other protection devices and ensure ratings align with your AC drive and DC bus requirements for reliable operation.
FWX-275A is RoHS compliant, aligning with modern regulatory sourcing requirements. For additional certifications such as CE or industry-specific approvals, please contact Eaton to confirm current status and usage guidance. This ensures procurement aligns with your plant’s compliance framework and project-specification standards.
The FWX-275A can reduce downtime through faster fault clearing and improved protection coordination, extending the life of motors, drives, and power distribution equipment. Its compatibility with standard FWX blocks simplifies upgrades and minimizes panel redesigns, delivering lower install costs and easier field maintenance for ongoing operations.