Bussmann JCW Series E-Rated PT...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,332.29
Bussmann JCW Series E-Rated PT Medium Voltage Fuse, Current-Limiting, 40 kAIC

Bussmann JCW Series E-Rated PT Medium Voltage Fuse, Current-Limiting, 40 kAIC

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Model: JCW-1E

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

$1,332.29
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Bussmann JCW Series E-Rated PT Medium Voltage Fuse, Current-Limiting, 40 kAIC

Bussmann JCW Series E-Rated PT medium voltage fuses deliver current-limiting overcurrent protection for potential transformer circuits in medium voltage switchgear and industrial power distribution systems. Rated 2.4/5.5 kV with a 40 kAIC RMS Symmetrical interrupt rating, this Class E single-element fuse uses a ferrule end x ferrule end connection in a 1-barrel, 1.63 in diameter body. The JCW Series is available across the family in amp ratings from 1A to 5A (1A, 2A, 3A, 5A) to match your protection scheme.

Key Features

  • Amp Rating Range: Available in 1A, 2A, 3A, and 5A ratings to match potential transformer circuit protection requirements.
  • Voltage Rating: 2.4/5.5 kV rating suited for medium voltage distribution equipment.
  • Interrupt Rating: 40 kAIC RMS Symmetrical interrupt rating for dependable current-limiting protection.
  • Class E Design: Class E fuse construction for standardized dimensional and performance compatibility.
  • Single Element Construction: Single-element fuse design for consistent current-limiting performance.
  • Connection Type: Ferrule end x ferrule end connection, 1 barrel, 1.63 in diameter for straightforward switchgear mounting.
  • Fuse Indicator: Non-indicating design.
  • Compact Size: Lightweight 1.1 lb fuse body with 7.46 in overall height.

Technical Specifications

  • Class: Class E
  • Packaging Type: Standard
  • Product Weight: 1.1 lb
  • Fuse Indicator: Non Indicating
  • Barrels: 1
  • Compliances: Contact factory
  • Voltage Rating: 2.4 kV, 5.5 kV
  • Product Height: 7.46 in

Typical Applications

  • Potential Transformer (PT) Circuit Protection
  • Medium Voltage Switchgear Protection
  • Utility and Industrial Power Distribution
  • Substation Equipment Protection
  • Current-Limiting Overcurrent Protection

Why Bussmann?

Bussmann JCW Series fuses are engineered for dependable current-limiting protection in medium voltage applications. With a Class E design, 40 kAIC RMS Symmetrical interrupt rating, and a consistent ferrule end x ferrule end connection across the 1A-5A amp rating family, these fuses support reliable performance for utility and industrial electrical systems. Choose Bussmann JCW Series fuses at ZenSupply for demanding potential transformer protection needs.

Manufacturer Resources

Product Specs

Class:
Class E
Interrupt Rating:
40 kAIC
Product Length Depth:
1.63 in
Product Width:
1.63 in
Element:
Single
Packaging Type:
Standard
Product Weight:
1.1 lb
Fuse Indicator:
Non Indicating
Barrels:
1
Connection:
Ferrule end x ferrule end
Compliances:
Contact factory
Department:
Electrical
Voltage Rating:
2.4/5.5 kV
Product Height:
7.46 in
Product Type:
Medium Voltage Fuse
Series:
JCW
Amperage Rating:
1A - 5A
Connection Type:
Ferrule End x Ferrule End
Configuration:
Single Element
Product Group:
Wiring Devices

Bussmann JCW-1E – Frequently Asked Questions

1) Will a Bussmann JCW fuse fit my 5 kV PT fuse clips?
The JCW is a Class E fuse with ferrule end x ferrule end terminations, a single barrel 1.63 in across, and a 7.46 in overall height. Class E construction means standardized dimensions, so it drops into clips built for a Class E ferrule-style PT fuse of that barrel diameter. Measure your existing clip spacing against the 7.46 in length before you order, since PT fuse holders are built around specific ferrule centers.
2) Can I use a JCW fuse on a 4160 V system?
Yes. The JCW carries a 2.4/5.5 kV rating, so it covers nominal systems through 5 kV, including 4160 V. Above that, a 5.5 kV fuse is not the right part and you need a higher voltage class PT fuse.
3) Is 40 kAIC enough interrupting capacity for my switchgear?
The JCW interrupts 40 kA RMS symmetrical and is current-limiting, which covers the available fault current at most medium voltage PT locations in industrial and utility switchgear. Compare that figure against the calculated available fault current at the bus where the PT is tapped; if your study shows more than 40 kA, this fuse is not rated for the location.
4) What amp ratings does the Bussmann JCW PT fuse come in?
Four: 1A (JCW-1E), 2A (JCW-2E), 3A (JCW-3E) and 5A (JCW-5E). That is the whole family, 1A through 5A. PT circuits draw very little, so the rating is chosen for the transformer burden and inrush rather than load current.
5) Does the JCW fuse have a blown fuse indicator?
No. The JCW is non-indicating, so there is no pop-out pin or flag to show it has operated. Crews troubleshooting a dead PT circuit will need to pull the fuse and test it, or rely on secondary voltage loss at the relay or meter. If you want visual indication on a PT fuse, specify an indicating style instead.
6) What is the difference between an E-rated PT fuse and a general purpose medium voltage fuse?
E rating is a performance standard for how the fuse handles overload and melting time, which is what lets a PT fuse ride through transformer energizing inrush without opening while still clearing a fault. The JCW is a Class E, single-element, current-limiting fuse built specifically for potential transformer circuits, metering and relaying taps in medium voltage switchgear. For protecting a power transformer or a motor circuit you want an R-rated or larger current-limiting fuse, not a small PT fuse.
7) I need to replace one fuse in a three-fuse PT set. Can I mix amp ratings?
Match the rating across all three phases. The JCW comes in 1A, 2A, 3A and 5A, and mixing ratings in the same PT set gives you inconsistent clearing times between phases. Read the rating off the fuse you are pulling (the suffix is the amp value, so JCW-3E is 3A) and order the same one for the replacement.
8) How heavy is the JCW fuse and does it need extra support in the holder?
It weighs 1.1 lb with a 7.46 in body, so it is light enough to be carried by standard PT fuse clips with no additional bracing. Standard packaging, one fuse per part number.
How fast can I get the Bussmann JCW-1E 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 JCW-1E come with a warranty?
Absolutely. The Bussmann JCW-1E 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 JCW-1E?
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 JCW-1E from ZenSupply?
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