Bussmann BKJJS JKS Limitron Cl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$320.90
Bussmann BKJJS JKS Limitron Class T Fuse, 600V, 3A/200A

Bussmann BKJJS JKS Limitron Class T Fuse, 600V, 3A/200A

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Model: BK/JJS-200

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

$320.90
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Bussmann BKJJS JKS Limitron Class T Fuse, 600V, 3A/200A

The Bussmann JKS Limitron is a Class T current-limiting, very fast acting fuse engineered for compact, high-performance circuit protection. Rated 600V with a 200 kAIC interrupt rating at 600 Vac, this fuse family is available in 3A and 200A ratings to cover a wide span of branch-circuit and equipment protection needs. Its small footprint and non-indicating design make it a space-efficient choice where standard Class T dimensions are required.

Key Features

  • Amp Rating Range: Available in 3A and 200A ratings, allowing selection to match specific circuit protection requirements.
  • Class T Construction: Class T current-limiting fuse design delivers fast clearing of fault currents in a compact form factor.
  • Very Fast Acting: Current-limiting, very fast acting fuse operation for rapid response to overcurrent conditions.
  • Voltage Rating: 600V rating supports use across a broad range of commercial and industrial circuits.
  • Interrupt Rating: 200 kAIC at 600 Vac for reliable performance under high fault-current conditions.
  • Small Footprint: Compact physical size simplifies installation in space-constrained fuse blocks and panelboards.
  • Non-Indicating: Non indicating fuse construction for standard circuit protection applications.

Technical Specifications

  • Class: Class T
  • Interrupt Rating: 200 kAIC at 600 Vac
  • Special Features: Small footprint
  • Voltage Rating: 600V
  • Packaging Type: Standard
  • Fuse Indicator: Non Indicating
  • Product Details: Current-limiting, Very Fast Acting Fuse
  • Product Type: Current-limiting, Very Fast Acting Fuse
  • Notes: Bulk

Typical Applications

  • Branch Circuit Protection
  • Panelboards and Switchboards
  • Motor Control Centers
  • Commercial and Industrial Electrical Systems
  • Equipment and Feeder Circuit Protection

Why Bussmann?

Bussmann builds the JKS Limitron with Class T current-limiting construction to deliver fast, dependable clearing of fault currents in a small footprint. The 600V rating and 200 kAIC interrupt rating at 600 Vac reflect a fuse designed for demanding commercial and industrial circuits, while the non-indicating design keeps installations straightforward for professional electrical work.

Manufacturer Resources

Product Specs

Product Group:
Fuses
Class:
Class T
Interrupt Rating:
200 kAIC at 600 Vac
Special Features:
Small footprint
Department:
Electrical
Voltage Rating:
600V
Packaging Type:
Standard
Fuse Indicator:
Non Indicating
Product Subgroup:
Other Fuses
Product Details:
Current-limiting, Very Fast Acting Fuse
Product Type:
Fuse
Notes:
Bulk
Amperage Rating:
3A-200A

Bussmann BK/JJS-200 – Frequently Asked Questions

1) Which amp ratings does the Bussmann JKS Limitron Class T fuse come in?
Two ratings are offered on the JKS Limitron: 3A (BK/JJS-3) and 200A (BK/JJS-200). Both are 600V Class T fuses with the same 200 kAIC interrupting rating, so the only choice you make is the amperage that matches the circuit you are protecting. Order by the full part number, since the JJS series spans many amp values and the suffix is what identifies the rating.
2) Can I drop a JKS Limitron into a fuse block built for Class R or Class J fuses?
No. The JKS Limitron is a Class T fuse, and Class T bodies and ferrule/bolt spacing are their own dimensional standard, not interchangeable with Class R or Class J holders. You need a Class T block or switch sized for the same amp range and 600V. The trade-off is the reason people spec Class T in the first place: it is a notably smaller footprint than the equivalent Class J or Class R fuse, which is why it turns up in tight panelboards and disconnects.
3) Will a very fast acting Class T fuse hold motor inrush?
Not reliably at the motor's full-load amps. The JKS Limitron is current-limiting and very fast acting, which is what you want ahead of switchgear, panelboards and equipment with low withstand, but it has no intentional time delay for starting inrush. On a motor branch circuit it either gets sized up per the motor rules or you use a time-delay class instead. For straight feeder, panelboard and equipment protection, the fast-acting characteristic is the point.
4) Is a 600V fuse okay to use on a 480V or 240V circuit?
Yes. The 600V rating on the JKS Limitron is a maximum, so it can be applied at 480V, 240V, 208V or anything below. What you cannot do is go the other way and put it on a system above 600V. The 200 kAIC interrupting rating is stated at 600 Vac, which covers service-entrance and switchboard locations with high available fault current.
5) Does this fuse have a blown-fuse indicator?
No, the JKS Limitron is non-indicating. There is no pop-out pin or window to tell you which one opened, so troubleshooting is done with a meter across the fuse or by checking voltage downstream. If your maintenance crew relies on visual blown-fuse identification, spec an indicating fuse or add an indicating fuse holder instead.
6) Why choose a current-limiting Class T fuse over a circuit breaker for high fault current locations?
Current-limiting means the fuse clears within the first quarter cycle and cuts the let-through energy the downstream gear ever sees. That is how a 200 kAIC device protects equipment with a much lower withstand rating, and it is the usual reason Class T shows up in switchboards, motor control centers and service equipment. The JKS Limitron gives you that at 600V in a body small enough to fit where a larger class will not.
7) What part number do I give my distributor for a 200 amp Class T fuse at 600 volts?
BK/JJS-200 is the Bussmann designation for the 200A, 600V JKS Limitron. The 3 amp version of the same fuse is BK/JJS-3. Both are Class T, current-limiting, very fast acting and non-indicating.
8) How do these ship, and are they individually boxed?
The JKS Limitron ships in standard packaging, listed as bulk rather than blister or retail cartons. For an MRO stockroom keeping spares on the shelf that is usually what you want; if you are relabeling or reselling in individual packs, plan on your own packaging.
How fast can I get the Bussmann BK/JJS-200 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 BK/JJS-200 come with a warranty?
Absolutely. The Bussmann BK/JJS-200 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 BK/JJS-200?
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 BK/JJS-200 from ZenSupply?
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