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   Main > Fuses > UL Class RK-5 Time Delay Fuses
  
FRNR (RK-5) Series Time Delay Fuses

UL Class RK-5 Time Delay Fuses
Protect motors and controllers with these 250 volt dual element fuses. High interrupting rating and time delay for starting motors. Fiberglass bodies resist moisture. Ferrule type available 0 to 60 amps; knife-blade type available 70 to 600 amps.
 
TO ORDER TIME DELAY FUSES:
Check with manufacturer or on motor nameplate for:
1. FLA (full load amps),
2. SF (service factor),
3. Voltage.
4. Determine number of fuses needed: one for single phase motors, two for single phase motors over 115 VAC, three for three phase motors.
5. Choose correct fuse based on the specifications to the right for AC motors:

Motors running protection
Motors with 1.15 SF or more:
FLA x 125 = fuse amp size

Short circuit protection
FLA x 1.75 = fuse amp size

Motors with 40° C Rise:
FLA x 125 = fuse amp size

FLA x 1.75 = fuse amp size

All other motors
FLA x 125 = fuse amp size

FLA x 1.75 = fuse amp size

Order the fuse with equal or next size larger amp rating than calculated fuse amp size. Fuse voltage rating must be equal to or greater than motor nameplate volts.
 
Item Amps Length Diameter Model

Add To Cart
GPI110FF110 1/10 2" 9/16" FRN-R1/10

GPI110FF110 1/8 2" 9/16" FRN-R1/8

GPI210FF210 2/10 2" 9/16" FRN-R2/10

GPI14FF14 1/4 2" 9/16" FRN-R1/4

GPI310FF310 3/10 2" 9/16" FRN-R3/10

GPI410FF410 4/10 2" 9/16" FRN-R4/10

GPI12FF05 1/2 2" 9/16" FRN-R1/2

Qty EA

GPI610FF610 6/10 2" 9/16" FRN-R6/10

GPI810FF810 8/10 2" 9/16" FRN-R8/10

GPI1FF01 1 2" 9/16" FRN-R1

GPI118FF118 1-1/8 2" 9/16" FRN-R1-1/8

GPI114FF114 1-1/4 2" 9/16" FRN-R1-1/4

GPI1410FF1410 1-4/10 2" 9/16" FRN-R1-4/10

GPI112FF112 1-1/2 2" 9/16" FRN-R1-1/2

GPI1610FF1610 1-6/10 2" 9/16" FRN-R1-6/10

GPI1810FF1810 1-8/10 2" 9/16" FRN-R1-8/10

GPI2FF02 2 2" 9/16" FRN-R2

GPI214FF214 2-1/4 2" 9/16" FRN-R2-1/4

GPI212FF212 2-1/2 2" 9/16" FRN-R2-1/2

Qty EA

GPI2810FF2810 2-8/10 2" 9/16" FRN-R2-8/10

GPI3FF03 3 2" 9/16" FRN-R3

GPI3210FF3210 3-2/10 2" 9/16" FRN-R3-2/10

GPI312FF312 3-1/2 2" 9/16" FRN-R3-1/2

GPI4FF04 4 2" 9/16" FRN-R4

Qty EA

GPI412FF412 4-1/2 2" 9/16" FRN-R4-1/2

GPI5FF05 5 2" 9/16" FRN-R5

Qty EA

GPI5610FF5610 5-6/10 2" 9/16" FRN-R5-6/10

GPI6FF06 6 2" 9/16" FRN-R6

GPI614FF614 6-1/4 2" 9/16" FRN-R6-1/4

Qty EA

GPI7FF07 7 2" 9/16" FRN-R7

GPI712FF712 7-1/2 2" 9/16" FRN-R7-1/2

GPI8FF08 8 2" 9/16" FRN-R8

Qty EA

GPI9FF09 9 2" 9/16" FRN-R9

GPI10FF10 10 2" 9/16" FRN-R10

Qty EA

GPI12FF12 12 2" 9/16" FRN-R12

GPI15FF15 15 2" 9/16" FRN-R15

Qty EA

GPI1712FF1712 17-1/2 2" 9/16" FRN-R17-1/2

GPI20FF20 20 2" 9/16" FRN-R20

GPI25FF25 25 2" 9/16" FRN-R25

Qty EA

GPI30FF30 30 2" 9/16" FRN-R30

GPI35FF35 35 3" 13/16" FRN-R35

GPI40FF40 40 3" 13/16" FRN-R40

GPI45FF45 45 3" 13/16" FRN-R45

GPI50FF50 50 3" 13/16" FRN-R50

Qty EA

GPI60FF60 60 3" 13/16" FRN-R60

GPI70FF70 70 5-7/8" 1-1/16" FRN-R70

GPI75FF75 75 5-7/8" 1-1/16" FRN-R75

GPI80FF80 80 5-7/8" 1-1/16" FRN-R80

Qty EA

GPI90FF90 90 5-7/8" 1-1/16" FRN-R90

GPI100FF100 100 5-7/8" 1-1/16" FRN-R100

Qty EA

GPI110FF110 110 7-1/8" 1-9/16" FRN-R110

GPI125FF125 125 7-1/8" 1-9/16" FRN-R125

GPI150FF150 150 7-1/8" 1-9/16" FRN-R150

GPI175FF175 175 7-1/8" 1-9/16" FRN-R175

GPI200FF200 200 7-1/8" 1-9/16" FRN-R200

GPI225FF225 225 8-5/8" 2-1/16" FRN-R225

GPI250FF250 250 8-5/8" 2-1/16" FRN-R250

GPI300FF300 300 8-5/8"" 2-1/16" FRN-R300

GPI350FF350 350 8-5/8" 2-1/16" FRN-R350

GPI400FF400 400 8-5/8" 2-1/16" FRN-R400

GPI450FF450 450 10-3/8" 2-9/16" FRN-R450

GPI500FF500 500 10-3/8" 2-9/16" FRN-R500

GPI600FF600 600 10-3/8" 2-9/16" FRN-R600