Bussmann FWA Series High Speed...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$56.39
Bussmann FWA Series High Speed Semiconductor Fuse, Ferrule End

Bussmann FWA Series High Speed Semiconductor Fuse, Ferrule End

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Model: FWA-20A10F

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

$56.39
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Bussmann FWA Series High Speed Semiconductor Fuse, Ferrule End x Ferrule End

This Bussmann high speed fuse family from the Eaton Bussmann FWA series is engineered as a semiconductor fuse to protect power semiconductor devices such as SCRs, diodes, and thyristors from damaging short-circuit currents. This listing covers the FWA series models available in amperage ratings from 20A to 30A, each built in a ferrule end x ferrule end configuration for compatibility with standard semiconductor fuse blocks and holders. Every option in this family carries a 130V rating consistent with the FWA series classification for these amperages (the series' 500 Vac/dc rating applies only to the 35-800A range), along with a 100 kAIC interrupt rating and a non-indicating design. Built for fast-acting protection, these fuses are suited to demanding industrial power electronics applications where component-level protection is critical.

Key Features

  • Amperage Range: available from 20A to 30A depending on the selected model for precise overcurrent protection.
  • Voltage Rating: 130V per Eaton Bussmann FWA series specification for these amp ratings; the FWA series' 500 Vac/dc rating applies only to the 35-800A amperage range.
  • Interrupt Rating: 100 kAIC interrupting capacity for demanding fault-current conditions across the family.
  • Non-Indicating Design: standard construction without a blown-fuse indicator.
  • Ferrule End x Ferrule End: dual ferrule termination for compatible fuse holders and blocks on every model in this family.
  • Series: part of the Eaton Bussmann FWA series of high speed semiconductor fuses.
  • High Speed Semiconductor Fuse: fast-acting FWA series construction designed to protect power semiconductor devices with low let-through energy.

Technical Specifications

  • Amperage Rating: 20A-30A (select model)
  • Series: FWA
  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Power Semiconductor Protection (SCRs, Diodes, Thyristors)
  • Variable Frequency Drives and Motor Control Systems
  • Rectifier and Power Conversion Circuits
  • Industrial Power Electronics Equipment
  • Uninterruptible Power Supplies (UPS) and Inverter Systems
  • Solid-State Power Switching and Control Equipment

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the FWA series high speed fuse line is engineered for the fast response and low let-through energy that power semiconductor devices require. With a 100 kAIC interrupt rating and non-indicating ferrule end x ferrule end construction across the 20A-30A range, this fuse family delivers reliable, code-compliant protection for professional industrial electrical applications. Eaton Bussmann fuses are widely specified by engineers for their consistent manufacturing quality and performance in demanding power electronics protection schemes.

Manufacturer Resources

Product Specs

Product Type:
Fuse
Voltage Rating:
130V
Amperage Rating:
20A-30A
Series:
FWA
Connection Type:
Ferrule End x Ferrule End
Department:
Electrical
Product Subgroup:
Shop by Brand
list_batch:
BUSS-20260919
Product Weight:
9.1 grams
Configuration:
Ferrule End x Ferrule End

Bussmann FWA-20A10F – Frequently Asked Questions

1) Can I use a Bussmann FWA-30A10F fuse to protect SCRs and diodes in a drive, or do I need a standard class fuse?
The FWA-30A10F is a high speed semiconductor fuse, which is what you want ahead of SCRs, diodes and thyristors. It clears fast with low let-through energy so the silicon opens after the fuse, not before it. A standard branch-circuit class fuse (RK5, J, CC) is sized for wire and motor protection and will not clear quickly enough to save a power semiconductor. Common uses are VFDs and motor control, rectifiers and power conversion, UPS and inverters, and solid-state switching gear.
2) What voltage is the Bussmann FWA-30A10F actually rated for? I've seen the FWA series listed at 500V.
At 30A the FWA is a 130V device. The 500 Vac/dc rating people associate with the FWA family applies only to the 35A through 800A range, not to the smaller ferrule sizes. If your circuit runs above 130V, the 30A FWA is the wrong part and you need to move up into the higher-voltage FWA range.
3) Will the FWA-30A10F mount in my existing fuse block, or does it need bolt-down lugs?
It's a ferrule end x ferrule end fuse, so it drops into clip-style semiconductor fuse blocks and holders sized for that body. There are no mounting tabs or bolt holes. If your gear uses a bolted or flush-end square-body fuse, this won't seat, and you'd need a bolt-in FWA size instead.
4) Is there a blown-fuse indicator on the Bussmann FWA-30A10F?
No. It's non-indicating construction, so there's no pin or flag to trip a microswitch and no visual telltale. If your panel relies on a blown-fuse alarm contact, you'll need an indicating-style fuse plus the matching indicator switch, or a separate monitoring relay across the fuse.
5) What fault current can the FWA-30A10F interrupt?
100 kAIC. That covers the available fault current at most industrial service points feeding drives and rectifier sections, so it can be applied where a lower-interrupting fuse would be outside its rating. Confirm the available fault current at the point of application matches or falls under that figure.
6) What amp ratings does the Bussmann FWA ferrule fuse come in here, and how do I pick between them?
Two models are offered: FWA-20A10F at 20 amps and FWA-30A10F at 30 amps. Semiconductor fuses are sized to the device's I2t withstand rather than to the conductor, so match the fuse to the RMS current through the semiconductor and verify the fuse I2t sits below the SCR or diode rating. Going up to 30A when the silicon only tolerates the 20A let-through defeats the purpose of the fuse.
7) How much does a Bussmann FWA-30A10F fuse weigh?
9.1 grams. It's a small ferrule-body fuse, which matters mainly if you're stocking spares on a truck or shipping a kit of them for MRO inventory.
How fast can I get the Bussmann FWA-20A10F 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 FWA-20A10F come with a warranty?
Absolutely. The Bussmann FWA-20A10F 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 FWA-20A10F?
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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