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Class RK1 Fuses

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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.

Littelfuse

LLNRK050 LLNRK Series Fuse 250V T/D Class Rk1 50A

MFR: Littelfuse

MFR #: LLNRK050

UPC: 079458330779

Item #: 73380

Available to Order

$76.48 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK050ID LLSRK Series Fuse 600V T/D Class Rk1 50A Indicator P

MFR: Littelfuse

MFR #: LLSRK050ID

UPC: 079458039870

Item #: 26740

Available to Order

$169.73 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK225 LLSRK Series Fuse 600V T/D Class Rk1 225A

MFR: Littelfuse

MFR #: LLSRK225

UPC: 079458350890

Item #: 883222

Available to Order

$1280.50 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK060ID LLSRK Series Fuse 600V T/D Class Rk1 60A Indicator P

MFR: Littelfuse

MFR #: LLSRK060ID

UPC: 079458039887

Item #: 27889

Available to Order

$169.73 each

Availability

Location	Available Qty

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.

Littelfuse

LLNRK015 LLNRK Series Fuse 250V T/D Class Rk1 15A

MFR: Littelfuse

MFR #: LLNRK015

UPC: 079458330687

Item #: 46104

Available to Order

$41.73 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK004ID LLSRK Series Fuse 600V T/D Class Rk1 4A Indicator P

MFR: Littelfuse

MFR #: LLSRK004ID

UPC: 079458055153

Item #: 14454

Available to Order

$117.50 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Fuse 600V T/D Class Rk1 300A Id

MFR: Littelfuse

MFR #: LLSRK300ID

UPC: 079458060690

Item #: 1146334

Available to Order

$1401.98 each

Availability

Location	Available Qty

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.

Littelfuse

LLNRK020 LLNRK Series Fuse 250V T/D Class Rk1 20A

MFR: Littelfuse

MFR #: LLNRK020

UPC: 079458330717

Item #: 46121

Available to Order

$41.73 each

Availability

Location	Available Qty

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.

Littelfuse

KLNR100 KLNR Series Fuse 250V F/A Class Rk1 100A

MFR: Littelfuse

MFR #: KLNR100

UPC: 079458280821

Item #: 610938

Available to Order

$426.35 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK100ID LLSRK Series Fuse 600V T/D Class Rk1 100A Id

MFR: Littelfuse

MFR #: LLSRK100ID

UPC: 079458060614

Item #: 730351

Available to Order

$350.53 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK175ID LLSRK Series Fuse 600V T/D Class Rk1 175A Id

MFR: Littelfuse

MFR #: LLSRK175ID

UPC: 079458060652

Item #: 521991

Available to Order

$701.20 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK200 LLSRK Series Fuse 600V T/D Class Rk1 200A

MFR: Littelfuse

MFR #: LLSRK200

UPC: 079458350883

Item #: 222299

Available to Order

$640.43 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK350ID LLSRK Series Fuse 600V T/D Class Rk1 350A Id

MFR: Littelfuse

MFR #: LLSRK350ID

UPC: 079458060706

Item #: 116310

Available to Order

$1401.98 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Fuse 600V T/D Class Rk1 125A Id

MFR: Littelfuse

MFR #: LLSRK125ID

UPC: 079458060638

Item #: 106130

Available to Order

$701.20 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK1.25ID LLSRK Series Fuse 600V T/D Cls Rk1 1-1/4A Indicator P

MFR: Littelfuse

MFR #: LLSRK1.25ID

UPC: 079458055047

Item #: 341651

Available to Order

$134.48 each

Availability

Location	Available Qty

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.

Littelfuse

KLSR400 KLSR Series Fuse 600V F/A Class Rk1 400A

MFR: Littelfuse

MFR #: KLSR400

UPC: 079458290936

Item #: 72555

Available to Order

$1979.40 each

Availability

Location	Available Qty

Fuse 250V T/D Class Rk1 350A

Littelfuse

Fuse 250V T/D Class Rk1 350A

MFR: Littelfuse

MFR #: LLNRK350

UPC: 079458330922

Item #: 392541

Available to Order

$699.75 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK02.8ID LLSRK Series Fuse 600V T/D Cls Rk1 2-8/10A Indicator P

MFR: Littelfuse

MFR #: LLSRK02.8ID

UPC: 079458055115

Item #: 778021

Available to Order

$140.23 each

Availability

Location	Available Qty

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.

Littelfuse

LLSRK01.8ID LLSRK Series Fuse 600V T/D Cls Rk1 1-8/10A Indicator P

MFR: Littelfuse

MFR #: LLSRK01.8ID

UPC: 079458055078

Item #: 779586

Available to Order

$150.35 each

Availability

Location	Available Qty

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.

Littelfuse

LLNRK225 LLNRK Series Fuse 250V T/D Class Rk1 225A

MFR: Littelfuse

MFR #: LLNRK225

UPC: 079458330892

Item #: 1004974

Available to Order

$699.75 each

Availability

Location	Available Qty

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.

Littelfuse

LLNRK010 LLNRK Series Fuse 250V T/D Class Rk1 10A

MFR: Littelfuse

MFR #: LLNRK010

UPC: 079458330656

Item #: 9385

Available to Order

$51.03 each

Availability

Location	Available Qty

Discontinued

250V 1A RK1 FUSE

Ferraz Shawmut

250V 1A RK1 FUSE

MFR: Mersen

MFR #: A2K1R

UPC: 782001915001

Item #: 207139

Available to Order

Availability

Location	Available Qty