Bussmann JJS Series Class T Ve...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$145.47
Bussmann JJS Series Class T Very Fast-Acting Current-Limiting Fuse, 600V

Bussmann JJS Series Class T Very Fast-Acting Current-Limiting Fuse, 600V

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Model: JJS-100

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

$145.47
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Bussmann JJS Series Class T Very Fast-Acting Current-Limiting Fuse, 600V

The Bussmann JJS Series from Eaton is a current-limiting, very fast-acting Class T fuse engineered with a small footprint for space-constrained panels and VFD line protection duty. Built with bolted blade end x bolted blade end terminations, this non-indicating fuse is rated 600V with a 200 kAIC interrupt rating at 600V, giving it the fault-clearing speed and high interrupt capacity that variable frequency drives and other sensitive electronic loads demand. The JJS Series is available across 14 amp ratings — 1A, 10A, 15A, 20A, 25A, 30A, 35A, 40A, 45A, 60A, 100A, 175A, 250A, and 400A — so you can match the exact ampacity your circuit requires while standardizing on one proven Class T platform.

Key Features

  • Current-Limiting, Very Fast-Acting: Clears fault currents quickly to reduce let-through energy and protect downstream components.
  • Small Footprint: Compact Class T body saves space in tightly packed panels and OEM enclosures.
  • VFD Line Protection: Purpose-suited for protecting variable frequency drives and other sensitive electronic equipment.
  • Class T Design: Bolted blade end x bolted blade end terminations for a secure, high-density mounting connection.
  • Non-Indicating: Standard construction without a blown-fuse indicator window.
  • Voltage Rating: 600V for use in demanding industrial and commercial power distribution systems.
  • Interrupt Rating: 200 kAIC at 600 Vac, delivering high fault-current interrupting capacity.
  • Amp Rating Range: Offered in 1A, 10A, 15A, 20A, 25A, 30A, 35A, 40A, 45A, 60A, 100A, 175A, 250A, and 400A to match specific circuit loads.

Certifications & Compliance

  • CE Marked
  • 200 kAIC Interrupt Rating at 600 Vac

Technical Specifications

  • Interrupt Rating: 200 kAIC at 600 Vac
  • Voltage Rating: 600V
  • Compliances: CE Marked

Typical Applications

  • Variable Frequency Drive (VFD) Line Protection
  • Motor Branch Circuit Protection
  • Industrial Control Panels and Enclosures
  • Panelboard and Power Distribution Protection
  • OEM Equipment and Machinery Protection

Why Bussmann?

Bussmann by Eaton builds the JJS Series on a proven Class T platform combining current-limiting, very fast-acting performance with a 200 kAIC interrupt rating at 600V for demanding fault-current environments. The bolted blade end x bolted blade end construction and small footprint support reliable, space-efficient installations, while CE marking supports use in globally specified equipment. Available across 14 amp ratings from 1A to 400A, the JJS Series lets engineers and panel builders standardize on one trusted fuse family for code-compliant, professional electrical protection.

Manufacturer Resources

Product Specs

Class:
Class T
Fuse Indicator:
Non-indicating
Interrupt Rating:
200 kAIC at 600 Vac
Special Features:
Small footprint
Voltage Rating:
600V
Compliances:
CE Marked
Packaging Type:
Standard
Department:
Electrical
Product Type:
Fuse
Listing:
CE Marked
Series:
JJS
Product Group:
Fuses
Product Subgroup:
Other Fuses

Bussmann JJS-100 – Frequently Asked Questions

1) What amp ratings can I get the Bussmann JJS Class T fuse in?
The JJS Series runs from 1A up to 800A: JJS-1, JJS-10, JJS-15, JJS-20, JJS-25, JJS-30, JJS-35, JJS-40, JJS-45, JJS-60, JJS-70, JJS-90, JJS-100, JJS-110, JJS-150, JJS-175, JJS-225, JJS-250, JJS-350, JJS-400, JJS-450, JJS-500 and JJS-800. The part number suffix is the amp rating, so ordering is straightforward once you have sized the circuit.
2) Is the Bussmann JJS fuse rated for a 600V system?
Yes, 600V is the JJS Series rating, with a 200 kAIC interrupting rating at 600 Vac. That covers 480V and 600V industrial distribution. For a 250V or lower system you can apply it, but you would be paying for voltage headroom you don't use.
3) Will a Class T fuse protect a VFD on the line side?
That is the duty the JJS Series is built for. It is current-limiting and very fast-acting, so it clears a fault before the let-through energy reaches the drive's input rectifier. Drive manufacturers commonly call out a Class T or semiconductor fuse on the line side for exactly this reason. Size to the drive manual's recommended fuse amperage, not to the motor FLA.
4) How does the JJS mount, and will it drop into my existing fuse clips?
The JJS uses bolted blade end x bolted blade end terminations, so it bolts down rather than snapping into spring clips. If your panel has clip-style holders for a Class J or Class R cartridge fuse, the JJS will not drop in. Class T bodies are also dimensionally distinct from Class J and R, so you need a Class T fuse block or holder sized for the same amp band.
5) Is 200 kAIC enough for my service with a high available fault current?
200,000 A interrupting at 600 Vac is the top tier for a branch-circuit fuse and will cover essentially any available fault current you will see downstream of a commercial or industrial service. The JJS being current-limiting also means it reduces let-through energy, which is what lets downstream gear be series-rated or keeps the incident energy down at the panel.
6) Should I use a Class T fuse or a Class J for my control panel?
Both are current-limiting, but Class T has a noticeably smaller body for the same ampere rating, which is why panel builders reach for it when the enclosure is tight or the fuse blocks are stacked. The JJS is the 600V Class T; its small footprint is the reason it gets specified over a Class J in dense OEM enclosures. Class J stays the choice when the equipment label or the drawing specifically calls for Class J, since the two are not dimensionally interchangeable.
7) Does the Bussmann JJS have a blown fuse indicator?
No. The JJS is non-indicating, so there is no window or pop-up pin to tell you visually which one opened. On a three-phase panel you will be checking with a meter or a fuse tester. If your maintenance crew relies on a visual check, plan for an indicating fuse holder or a blown-fuse relay instead.
8) Can I use the JJS for motor branch circuit protection?
Yes, motor branch circuit protection is one of its listed applications, along with panelboards, industrial control panels and OEM machinery. Keep in mind it is a very fast-acting fuse, not a dual-element time-delay type, so it will not ride through a full across-the-line motor inrush unless it is oversized per the motor rules. For direct-on-line motor starting, a time-delay Class RK5 or Class J is the usual pick; the JJS earns its place ahead of a drive or on circuits feeding electronics.
9) Can I mix amp ratings of JJS fuses in one panel to standardize on one fuse family?
That is the practical reason to spec the series. Every rating from 1A to 800A shares the same Class T platform, the same 600V rating and the same 200 kAIC interrupting capacity, so a facility or panel shop can stock one family across feeders, control circuits and drive line protection instead of juggling several fuse classes. Just match the fuse block to each amp band, since Class T block sizes step with ampacity.
10) Is the Bussmann JJS acceptable for export equipment?
The JJS Series is CE Marked, which is what a machine builder shipping into Europe needs on the compliance file for the fuse.
How fast can I get the Bussmann JJS-100 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 JJS-100 come with a warranty?
Absolutely. The Bussmann JJS-100 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 JJS-100?
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
Why buy the Bussmann JJS-100 from ZenSupply?
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