Class RK1 Fuses

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Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK010ID
UPC: 079458055252
Item #: 75525
Available to Order
$170.80 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK025ID
UPC: 079458039825
Item #: 521987
Available to Order
$150.45 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK200
UPC: 079458330885
Item #: 128599
Available to Order
$570.45 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK004
UPC: 079458330533
Item #: 8737
Available to Order
$83.68 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK090
UPC: 079458330816
Item #: 521980
Available to Order
$266.68 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK003
UPC: 079458330472
Item #: 1144190
Available to Order
$83.68 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK008
UPC: 079458330632
Item #: 22271
Available to Order
$80.63 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK007ID
UPC: 079458055214
Item #: 500370
Available to Order
$179.43 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK090ID
UPC: 079458060607
Item #: 521989
Available to Order
$533.80 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK005ID
UPC: 079458055177
Item #: 424845
Available to Order
$170.80 each
Availability
Location Available Qty
Littelfuse
KLSR series RK1 fuses were the earliest type of current-limiting fuse developed. Their single-element, silver link design enables them to provide fast-acting overload and short-circuit protection. When used to protect inductive loads such as motors, solenoids, and transformers, KLSR series fuses must be greatly oversized to prevent opening the fuses on harmless inrush currents. In such applications, KLSR series fuses may only provide short-circuit protection. We recommend using POWR-PRO LLNRK/LLSRK series RK1, dual-element, time-delay fuses in all new applications requiring the current-limiting ability of UL Class RK1 fuses, or in existing applications where fast-acting RK1 or RK5 fuses have been opening on harmless system surges such as motor starting currents.
MFR: Littelfuse
MFR #: KLSR001
UPC: 079458290318
Item #: 169977
Available to Order
$180.13 each
Availability
Location Available Qty
Littelfuse
RK1 fuses are extremely current-limiting fuses meaning they greatly reduce or eliminate damage to circuits and equipment under short-circuit conditions. Replacing existing Class H, K and RK5 fuses with RK1 fuses is one of the easiest ways to immediately improve the protection of plant workers and equipment.
MFR: Littelfuse
MFR #: LLSRK.800
UPC: 079458350302
Item #: 636132
Available to Order
$210.55 each
Availability
Location Available Qty
Littelfuse
RK1 fuses are extremely current-limiting fuses meaning they greatly reduce or eliminate damage to circuits and equipment under short-circuit conditions. Replacing existing Class H, K and RK5 fuses with RK1 fuses is one of the easiest ways to immediately improve the protection of plant workers and equipment.
MFR: Littelfuse
MFR #: LLSRK.100
UPC: 079458350111
Item #: 278340
Available to Order
$224.70 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK040ID
UPC: 079458039856
Item #: 65978
Available to Order
$258.45 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK070
UPC: 079458330793
Item #: 74084
Available to Order
$259.20 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK050
UPC: 079458330779
Item #: 73380
Available to Order
$115.68 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK050ID
UPC: 079458039870
Item #: 26740
Available to Order
$258.45 each
Availability
Location Available Qty
Littelfuse
RK1 fuses are extremely current-limiting fuses meaning they greatly reduce or eliminate damage to circuits and equipment under short-circuit conditions. Replacing existing Class H, K and RK5 fuses with RK1 fuses is one of the easiest ways to immediately improve the protection of plant workers and equipment.
MFR: Littelfuse
MFR #: LLSRK225
UPC: 079458350890
Item #: 883222
Available to Order
$1948.00 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK060ID
UPC: 079458039887
Item #: 27889
Available to Order
$258.45 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK015
UPC: 079458330687
Item #: 46104
Available to Order
$63.08 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK004ID
UPC: 079458055153
Item #: 14454
Available to Order
$170.80 each
Availability
Location Available Qty
Littelfuse
Fuse 600V T/D Class Rk1 300A Id
MFR: Littelfuse
MFR #: LLSRK300ID
UPC: 079458060690
Item #: 1146334
Available to Order
$2134.93 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK020
UPC: 079458330717
Item #: 46121
Available to Order
$63.08 each
Availability
Location Available Qty
Littelfuse
KLNR/KLSR series RK1 fast-acting fuses were the earliest type of current-limiting fuse developed. Their single-element, silver link design enables them to provide fast-acting overload and short-circuit protection. When used to protect inductive loads such as motors, solenoids, and transformers, KLNR/KLSR series fuses must be greatly oversized to prevent opening the fuses on harmless inrush currents. In such applications, KLNR/KLSR series fuses may only provide short-circuit protection. We recommend using POWR-PRO LLNRK/LLSRK series RK1, dual-element, time-delay fuses in all new applications requiring the current-limiting ability of UL Class RK1 fast-acting fuses, or in existing applications where fast-acting RK1 or RK5 fuses have been opening on harmless system surges such as motor starting currents.
MFR: Littelfuse
MFR #: KLNR100
UPC: 079458280821
Item #: 610938
Available to Order
$644.13 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK100ID
UPC: 079458060614
Item #: 730351
Available to Order
$533.80 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK175ID
UPC: 079458060652
Item #: 521991
Available to Order
$1067.80 each
Availability
Location Available Qty
Littelfuse
RK1 fuses are extremely current-limiting fuses meaning they greatly reduce or eliminate damage to circuits and equipment under short-circuit conditions. Replacing existing Class H, K and RK5 fuses with RK1 fuses is one of the easiest ways to immediately improve the protection of plant workers and equipment.
MFR: Littelfuse
MFR #: LLSRK200
UPC: 079458350883
Item #: 222299
Available to Order
$974.30 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK350ID
UPC: 079458060706
Item #: 116310
Available to Order
$2134.93 each
Availability
Location Available Qty
Littelfuse
Fuse 600V T/D Class Rk1 125A Id
MFR: Littelfuse
MFR #: LLSRK125ID
UPC: 079458060638
Item #: 106130
Available to Order
$1067.80 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK1.25ID
UPC: 079458055047
Item #: 341651
Available to Order
$195.45 each
Availability
Location Available Qty
Littelfuse
KLSR series RK1 fuses were the earliest type of current-limiting fuse developed. Their single-element, silver link design enables them to provide fast-acting overload and short-circuit protection. When used to protect inductive loads such as motors, solenoids, and transformers, KLSR series fuses must be greatly oversized to prevent opening the fuses on harmless inrush currents. In such applications, KLSR series fuses may only provide short-circuit protection. We recommend using POWR-PRO LLNRK/LLSRK series RK1, dual-element, time-delay fuses in all new applications requiring the current-limiting ability of UL Class RK1 fuses, or in existing applications where fast-acting RK1 or RK5 fuses have been opening on harmless system surges such as motor starting currents.
MFR: Littelfuse
MFR #: KLSR400
UPC: 079458290936
Item #: 72555
Available to Order
$2931.83 each
Availability
Location Available Qty
Littelfuse
Fuse 250V T/D Class Rk1 350A
MFR: Littelfuse
MFR #: LLNRK350
UPC: 079458330922
Item #: 392541
Available to Order
$1058.25 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK02.8ID
UPC: 079458055115
Item #: 778021
Available to Order
$203.83 each
Availability
Location Available Qty
Littelfuse
The all-new LLSRK_ID series fuse is the most advanced Class RK1 fuse available today providing unparalleled performance and protection to modern circuits. The patented Indicator technology provides instant identification of a blown fuse greatly enhancing system up time, while the precision formed short circuit elements virtually eliminate damage to components from unexpected electrical faults. In addition, the all new solid-state overload section has no moving parts, stopping unnecessary fatigue failures commonly found in other spring loaded fuses.
MFR: Littelfuse
MFR #: LLSRK01.8ID
UPC: 079458055078
Item #: 779586
Available to Order
$218.55 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK225
UPC: 079458330892
Item #: 1004974
Available to Order
$1058.25 each
Availability
Location Available Qty
Littelfuse
Littelfuse LLNRK and LLSRK series POWR-PRO fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
MFR: Littelfuse
MFR #: LLNRK010
UPC: 079458330656
Item #: 9385
Available to Order
$77.18 each
Availability
Location Available Qty
Mersen
Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 0.3A Ferrule
MFR: Mersen
MFR #: A2D3/10R
UPC: 782001990589
Item #: 294036
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A2K-R - Class RK1 - Fast-Acting 250VAC 250VDC 45A Ferrule
MFR: Mersen
MFR #: A2K45R
UPC: 782001915148
Item #: 207235
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A2K-R - Class RK1 - Fast-Acting 250VAC 250VDC 5A Ferrule
MFR: Mersen
MFR #: A2K5R
UPC: 782001915025
Item #: 207183
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 8A Ferrule SmartSpot
MFR: Mersen
MFR #: A2D8R
UPC: 782001990787
Item #: 82409
Available to Order
$36.26 each
Availability
Location Available Qty
Mersen
Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 25A Ferrule SmartSpot
MFR: Mersen
MFR #: A2D25R
UPC: 782001990855
Item #: 42877
Available to Order
$27.82 each
Availability
Location Available Qty
Mersen
Fuse A6K-R - Class RK1 - Fast-Acting 600VAC 300VDC 225A Blade
MFR: Mersen
MFR #: A6K225R
UPC: 782001915834
Item #: 314305
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 3A Ferrule
MFR: Mersen
MFR #: A2D3R
UPC: 782001990688
Item #: 555021
Available to Order
$37.69 each
Availability
Location Available Qty
Mersen
Fuse A2K-R - Class RK1 - Fast-Acting 250VAC 250VDC 225A Blade
MFR: Mersen
MFR #: A2K225R
UPC: 782001915322
Item #: 207625
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A6K-R - Class RK1 - Fast-Acting 600VAC 300VDC 100A Blade
MFR: Mersen
MFR #: A6K100R
UPC: 782001915735
Item #: 281099
Available to Order
$288.27 each
Availability
Location Available Qty
Mersen
Fuse A2K-R - Class RK1 - Fast-Acting 250VAC 250VDC 350A Blade
MFR: Mersen
MFR #: A2K350R
UPC: 782001915353
Item #: 207696
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 3.5A Ferrule
MFR: Mersen
MFR #: A2D3-1/2R
UPC: 782001990701
Item #: 739491
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty
Mersen
Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 1.4A Ferrule
MFR: Mersen
MFR #: A2D1-4/10R
UPC: 782001990565
Item #: 739489
Available to Order
Phone: 1-855-999-2372 Email Contact Us
Availability
Location Available Qty