Bussmann FBP Series Non-Indica...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,138.05
Bussmann FBP Series Non-Indicating Semiconductor Fuse, Blade End

Bussmann FBP Series Non-Indicating Semiconductor Fuse, Blade End

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Model: FBP-125

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,138.05
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Bussmann FBP Series Non-Indicating Semiconductor Fuse, Blade End

The Bussmann FBP Series Non-Indicating Semiconductor Fuse from Eaton Bussmann is engineered to protect sensitive semiconductor devices from damaging fault currents in industrial and commercial power circuits. This semiconductor fuse carries a 600 Vac voltage rating and a 200 kAIC interrupt rating, delivering high fault-current protection for demanding applications. Built with a non-indicating design and blade end X blade end terminals, the FBP series is available in amp ratings from 50A to 600A to match a wide range of circuit protection needs across the family. The FBP series is UL Recognized for use in professional electrical installations.

Key Features

  • Amp Rating Range: Available in ratings from 50A to 600A to cover a wide range of semiconductor circuit protection applications.
  • Voltage Rating: 600 Vac rated for dependable overcurrent protection in industrial power circuits.
  • Interrupt Rating: 200 kAIC interrupt rating delivers high fault-current withstand capability for demanding fault conditions.
  • Non-Indicating Design: Standard non-indicating construction for straightforward semiconductor fuse protection without a blown-fuse indicator.
  • Blade End Terminals: Blade end X blade end terminal configuration for secure mounting in compatible fuse blocks and holders.
  • Semiconductor Fuse Type: Purpose-built to protect semiconductor devices such as SCRs, diodes, and rectifiers from damaging fault currents.

Certifications & Compliance

  • UL Recognized

Technical Specifications

  • Certifications: UL Recognized
  • Packaging Type: Standard
  • Amp Rating Range: 50A - 600A
  • Voltage Rating: 600 Vac
  • Interrupt Rating: 200 kAIC

Typical Applications

  • Semiconductor Device Protection (SCRs, Diodes, Rectifiers)
  • Motor Drive and Power Conversion Circuits
  • Industrial Power Electronics and Control Panels
  • Commercial and Industrial Electrical Systems
  • Panelboard and Switchgear Overcurrent Protection

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the FBP series semiconductor fuse reflects that reputation with a 600 Vac voltage rating, 200 kAIC interrupt rating, and UL Recognized construction. The non-indicating, blade end design supports reliable, code-compliant performance for professional electrical and industrial power applications. With amp ratings spanning 50A to 600A, the FBP series gives engineers and electricians a dependable option for protecting semiconductor devices across a wide range of system designs.

Manufacturer Resources

Product Specs

Certifications:
UL Recognized
Connection:
Blade end x blade end
Packaging Type:
Standard
Department:
Electrical
Fuse Indicator:
Non Indicating
Product Length Depth:
4.9 in
Product Weight:
.15 lb
Product Width:
.001 in
Interrupt Rating:
200 kAIC
Product Height:
.001 in
Product Type:
Semiconductor Fuse
Series:
FBP
Voltage Rating:
600V
Amperage Rating:
50A - 600A
Listing:
UL Recognized
Configuration:
Blade End Terminals
Product Group:
Wiring Devices

Bussmann FBP-125 – Frequently Asked Questions

1) What amp ratings can I get in the Bussmann FBP semiconductor fuse?
The FBP series spans 50A to 600A. The individual ratings you can order are 50, 60, 90, 125, 150, 175, 200, 300, 350, 450 and 600 amps, ordered as FBP-50 through FBP-600. Every one of them carries the same 600V and 200 kAIC ratings, so stepping up or down in amperage does not change the voltage or fault-current capability of the fuse.
2) Will a Bussmann FBP fuse bolt into my fuse block, or does it need clips?
The FBP is a blade end by blade end fuse, so it mounts into fuse blocks and holders built for blade end semiconductor fuses rather than ferrule clips. If your existing holder takes round ferrule ends, the FBP will not seat in it.
3) Can I use a Bussmann FBP fuse on a 480V industrial drive?
Yes. The FBP is rated 600 Vac, which covers 480V three phase drive and power conversion circuits, and its 200 kAIC interrupt rating handles high available fault current at that service level. Do not apply it above 600V.
4) What is a semiconductor fuse for, and can I just use a regular Class J or RK5 fuse instead?
A semiconductor fuse like the FBP is built to clear faults fast enough to protect solid state devices, SCRs, diodes and rectifiers, in drives, rectifier stacks and power conversion gear. A general purpose branch circuit fuse protects the conductors, not the silicon, and will usually let a diode or SCR fail first. If you are fusing a drive or rectifier bridge, use the semiconductor fuse the equipment drawing calls for.
5) What is the closest alternative to a Bussmann FBP semiconductor fuse if the circuit runs above 600 volts?
The Bussmann FBP series is rated 600V, so it stops at that ceiling. For a higher-voltage semiconductor circuit, the Littelfuse L70S series is a very fast-acting semiconductor fuse rated 700VAC/650VDC and covers applications above the FBP's 600V limit. Confirm amp rating and mounting style match your holder before substituting.
6) Does the FBP fuse have a blown-fuse indicator?
No. The FBP is a non-indicating fuse, so there is no pop-out pin or visual flag and no provision for a microswitch indicator kit. Troubleshooting means metering the fuse or relying on a separate monitoring relay in the panel.
7) Is the Bussmann FBP UL Listed for use as a branch circuit fuse?
The FBP is UL Recognized, which is a component recognition for use inside listed equipment, not a standalone UL Listed branch circuit device. Panel builders specify it as a component in drives, control panels and switchgear.
8) What semiconductor fuse should I use if my circuit is 250V or 700V instead of 600V?
The FBP tops out at 600 Vac, so it is not the right part outside that. For lower voltage DC and AC work, Littelfuse offers the L15S series at 150VAC/150VDC and the L25S series at 250V, and the L50S series runs 500V. Above 600V, the Littelfuse L70S series is rated 700VAC/650VDC. Match the fuse voltage rating to the circuit, never below it.
9) Is the FBP a fast-acting fuse like the Littelfuse L50S?
The Littelfuse L50S and L70S are catalogued as very fast-acting semiconductor fuses at 500V and 700VAC/650VDC respectively. The Bussmann FBP is a 600 Vac semiconductor fuse with blade ends and a 200 kAIC interrupt rating. If your drive manual calls out a specific clearing characteristic, match it to the equipment manufacturer's fuse table rather than swapping across series on voltage alone.
10) How do I order the exact FBP fuse I need?
Amp rating is the only choice to make. The part number is FBP plus the amperage, so a 200 amp fuse is FBP-200 and a 450 amp is FBP-450. Everything else, 600V, 200 kAIC, non-indicating, blade end terminals, is fixed across the series, and they ship in standard packaging.
11) Is there a semiconductor fuse equivalent to the Bussmann FBP for a 500 volt drive circuit?
The Littelfuse L50S series is a very fast-acting semiconductor fuse rated 500V, which suits a 500V drive circuit directly. The Bussmann FBP is rated 600V, so it also covers a 500V system with margin. The difference to check is the terminal style: the FBP uses blade end x blade end terminals, so your fuse block has to accept that form.
12) Can I swap a Littelfuse L50S or L70S into a holder built for a Bussmann FBP fuse?
Do not assume it drops in. The Bussmann FBP uses a blade end x blade end terminal configuration with a body length of 4.9 inches, and the Littelfuse L50S and L70S are separate semiconductor fuse series with their own dimensions and mounting. Match the terminal style and centers to the fuse block before ordering a substitution.
13) If I need a blown-fuse indicator, is the Bussmann FBP the right choice?
No. The FBP is a non-indicating semiconductor fuse, so there is no visual blown-fuse flag on the body. If you want an indicator, choose an indicating semiconductor fuse instead and keep the 600V, 200 kAIC and 50A-600A requirements in hand when you select it.
How fast can I get the Bussmann FBP-125 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 FBP-125 come with a warranty?
Absolutely. The Bussmann FBP-125 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann FBP-125?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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