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Bussmann FWP-350 Eaton FWP Series High-Speed Fuse, Standard Type
The Bussmann FWP-350 is part of the Eaton Bussmann series FWP high speed fuse line, engineered to protect power electronics, drives, and other sensitive solid-state equipment from short-circuit and overcurrent damage. This Standard-type fuse carries a 1400 Vac rating for FWS 8-15A configurations, a 2100 Vac rating for FWS 2-6A configurations, and a 1000 Vdc rating for FWL/FWS 2-30A configurations, giving it broad application coverage across both AC and DC circuits. Built with a Non Indicating design, the FWP-350 delivers fast-acting, dependable interruption for demanding industrial and commercial electrical systems.
Key Features
- Series & Type: Eaton Bussmann series FWP high speed fuse, Standard type, engineered for fast, reliable interruption of fault currents.
- Voltage Rating: 1400 Vac (FWS 8-15A), 2100 Vac (FWS 2-6A), and 1000 Vdc (FWL/FWS 2-30A) for broad AC and DC circuit coverage.
- Fuse Indicator: Non Indicating construction, suited to standard visual inspection during routine maintenance.
- Compact, Lightweight Design: approximately .8 lb per fuse for straightforward handling and installation.
- Compliances: Contact factory for current compliance and listing documentation on this fuse.
Technical Specifications
- Compliances: Contact factory
- Fuse Indicator: Non Indicating
- Product Height: .001 in
- Product Length Depth: .001 in
- Product Weight: .8 lb
- Product Width: .001 in
- Voltage Rating: 1400 Vac (FWS 8-15 A), 2100 Vac (FWS 2-6 A), 1000 Vdc (FWL/FWS 2-30 A)
Typical Applications
- Power Electronics and Semiconductor Protection
- Variable Frequency Drives and Motor Control Circuits
- AC and DC Power Distribution Systems
- Industrial and Commercial Electrical Equipment
Why Bussmann?
Bussmann by Eaton is a recognized name in circuit protection, and the FWP series high speed fuse reflects that engineering focus with a Standard-type design built for fast-acting fault interruption across both AC and DC circuits. With clearly defined voltage ratings for each amperage configuration and a non-indicating construction, the FWP-350 delivers dependable, code-conscious protection for demanding power electronics applications. Choose Bussmann for circuit protection built on decades of proven electrical engineering.
Manufacturer Resources
Product Specs
- Compliances:
- Contact factory
- Fuse Indicator:
- Non Indicating
- Packaging Type:
- Standard
- Product Height:
- .001 in
- Product Length Depth:
- .001 in
- Product Weight:
- .8 lb
- Product Width:
- .001 in
- Department:
- Electrical
- Product Type:
- Semiconductor Fuse
- Product Group:
- Circuit Protection
- Product Subgroup:
- Fuses
Bussmann FWP-350 – Frequently Asked Questions
1) What is the Bussmann FWP-350 fuse used for?
The FWP-350 is a high speed fuse from the Eaton Bussmann FWP series, Standard type, used to protect power electronics and solid-state equipment from short-circuit and overcurrent damage. Typical places it goes: variable frequency drives and motor control circuits, semiconductor and rectifier protection, and AC or DC power distribution in industrial and commercial equipment. High speed (semiconductor) fuses clear faults far faster than general-purpose branch-circuit fuses, which is what keeps diodes, IGBTs and SCRs from failing first.
2) Can I use the FWP-350 on a DC circuit, or is it AC only?
Both. The FWP line is published with a 1000 Vdc rating for FWL/FWS 2-30 A configurations alongside its AC ratings of 1400 Vac for FWS 8-15 A and 2100 Vac for FWS 2-6 A. So it is applied on AC and DC circuits, but the voltage ceiling you design to depends on the configuration, not on the series name. Match your circuit voltage to the rating that corresponds to the configuration you are buying before you commit it to a DC bus.
3) Will a standard Class J or Class RK5 fuse work instead of an FWP high-speed fuse in a drive?
Not as a substitute for semiconductor protection. The FWP series is a high speed fuse built for fast interruption of fault current ahead of power electronics; standard branch-circuit classes are sized and timed to protect conductors and motors, and they let through far more energy before clearing. Using one in place of an FWP generally means the drive's semiconductors fail before the fuse does. Keep the high speed fuse where the drive manufacturer calls for one, and use conventional classes for feeder and branch protection.
4) Does the Bussmann FWP-350 have a blown-fuse indicator or do I have to test it?
No indicator. The FWP-350 is a Non Indicating fuse, so there is no pop-up pin or visual flag to tell you it has operated. On a panel where you need to find the opened fuse fast, you either test continuity with a meter or feed the circuit through a separate monitoring microswitch. If your maintenance routine depends on walk-by visual inspection, specify an indicating fuse instead.
5) What is the exact part number I should order for a Bussmann FWP high-speed fuse, and how is it packaged?
Order by manufacturer part number FWP-350, Bussmann by Eaton. It ships as Standard packaging, one fuse per unit at about .8 lb each, so quantities are counted in individual fuses rather than cartons or strips. Distributors cross-referencing the FWP family should note the suffix is the amp designation, so adjacent models in the series differ only in that trailing number.
6) How much does one Bussmann FWP-350 fuse weigh for handling and shipping?
About .8 lb per fuse. That is light enough to handle and seat by hand, though FWP-series bolt-in style bodies should be torqued to the drive or disconnect terminals rather than relied on to hold by friction.
How fast can I get the Bussmann FWP-350 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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U.S.
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann FWP-350 come with a warranty?
Absolutely. The Bussmann FWP-350 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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