J Fuses
National Fuse stocks a large selection of class J from some of the top manufacturers in the industry. The Littelfuse JTD-8-ID boasts ratings up to 600 Amps and features a current limiting design and a blown fuse indicator for optimal safety, and Its compact size makes it perfect for small circuits. We also offer the Bussmann LPJ-9SP. With a high degree of current limitation, its small size, and a dual-element time delay, this little guy offers superior circuit protection.
If you are in need of a class J fuse, look no further than National Fuse. Our helpful team is available to assist you in finding the proper fuse for your needs at a competitive price. Please contact us by phone if you have any questions at 866-567-9358, or pop into our office at 19100 Old Detroit Road in Rocky River, Ohio.
If you already know what you need, our entire catalog is available 24 hours a day online. Your online order with National Fuse will be promptly processed, packaged, and shipped via UPS of Fed Ex so you can get the J fuse you need to get the job done.
Showing 1–16 of 410 resultsSorted by average rating
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FB60J30B3
30A 600V CLASS J 3-POLE FUSE BLOCK Mersen’s new Generation 2 open style class J fuse blocks accommodate class J fuses ranging from 0-100A, 600V. A choice of screw, pressure plate, and box connectors fit a wide range of stranded or solid wire. Gen2 fuse blocks are DIN-rail mountable, more compact than the traditional… Read more »
$77.95 Add to cart -

TCF-60RN
60A 600V J CUBE FUSE NON-INDICATING
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TCF-30RN
30A 600V J TIME-DELAY CUBE FUSE
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JM60100-1CR
100A 600V J FUSE BLOCK Bussmann series JM modular fuse block, CR, 70-100 A, Single-pole, Class J, Knife blade end x knife blade end, 200 kAIC, 600 V
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J646
600A TO 400A 600V CLASS J FUSE REDUCER
$457.39 Add to cart -

J626
600A TO 200A 600V CLASS J FUSE REDUCER
$411.24 Add to cart -

J416
100A to 400A J FUSE REDUCER
$275.22 Add to cart -

SPFJ-160L
160A 1000VDC J The SPFJ series is the smallest 1000 V dc 70–450 A dc full range fuse available in the market. The SPFJ series is manufactured in Class J case sizes and is suitable for photovoltaic, dc cable protection, EV off-board charging and other dc applications that allow for both fuse holder and… Read more »
$400.98 Add to cart -

HSJ-90
90A 600V J HI SPEED The High Speed Class J (HSJ) combines the low I2t of a semiconductor fuse and the branch-circuit performance of a Class J UL Listed fuse into a single design. The HSJ can provide both branch circuit protection per NEC requirements, as well as very low I2t for protection of power… Read more »
$142.39 Add to cart -

HSJ-450
450A 600V J HI SPEED The High Speed Class J (HSJ) combines the low I2t of a semiconductor fuse and the branch-circuit performance of a Class J UL Listed fuse into a single design. The HSJ can provide both branch circuit protection per NEC requirements, as well as very low I2t for protection of power… Read more »
$907.79 Add to cart -

HSJ-35
35A 600V J HI SPEED The High Speed Class J (HSJ) combines the low I2t of a semiconductor fuse and the branch-circuit performance of a Class J UL Listed fuse into a single design. The HSJ can provide both branch circuit protection per NEC requirements, as well as very low I2t for protection of power… Read more »
$68.99 Add to cart -

HSJ-300
300A 600V J HI SPEED The High Speed Class J (HSJ) combines the low I2t of a semiconductor fuse and the branch-circuit performance of a Class J UL Listed fuse into a single design. The HSJ can provide both branch circuit protection per NEC requirements, as well as very low I2t for protection of power… Read more »
$571.57 Add to cart -

LFJ60600-3C
600A 600V J 3P BLOCK Class J 3 Pole Fuse Block Description The Littelfuse 600 V Class J blocks offer generous space savings and enhanced value over previous generations, such as indication, snap-to-release DIN-rail mounting and universal mounting holes. Features/Benefits Space-saving design—up to 45 % smaller Universal mounting holes for easy replacement … Read more »
$2,877.06 Add to cart -

A4J450
450A 600V FAST J Amp-Trap fast-acting A4J fuses deliver excellent current-limiting protection to a wide variety of applications. Their unique dimensions prevent the substitution of other fuses with lower voltage ratings, interrupting ratings, or current-limiting capability. High current limitation for low peak let-thru current Unique dimensions prevent replacement by other fuse classes Fiberglass body provides… Read more »
$400.19 Add to cart -

LFPSJ60-2
60A 600V 2P J BLOCK The Class J POWR-SAFE LFPSJ series dead front fuse holders feature the IP20 touch-safe design for maximum protection to personnel. These fuse holders are available in 1-, 2-, and 3-pole configurations and are offered in indicating and non-indicating options. The LFPSJ series is DIN rail mountable and easily installed and… Read more »
$115.76 Add to cart -

AJT-90N
90A 600V TDJ NON-INDICATING Amp-Trap 2000® AJT fuses provide non-indication as well as a SmartSpot visual open fuse indicator. With advanced material technology the AJT fuse provides IEC Type 2 No Damage protection to main, feeder, and branch circuits, for all types of loads — yet, they require only half the mounting space needed for… Read more »
$72.47 Add to cart
