Powr-Speed® High-Speed Fuses

Littelfuse Powr-Speed® High-Speed Fuses protect critical power electronics from overcurrents that may cause damage to equipment. Littelfuse high-speed fuses are reliable, fast-acting devices that can reduce the amount of short circuit current and improve the life of power semiconductor devices. Littelfuse Powr-Speed Fuses are engineered with an innovative bridge design, arc-quenching material, and a robust element to provide fast, extreme current limitation.

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Qty. RoHS ECAD Model Series
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Voltage Rating AC
Voltage Rating DC
Interrupt Rating
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Fuse Size/Group
Indicator Style
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Littelfuse Specialty Fuses 315A 1250V SIZE 73 Flush End In Thread
Datasheet
14Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 315 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 400A 1250V SIZE 73 Flush End In Thread
Datasheet
24Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 400 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 450A 1250V SIZE 73 Flush End In Thread
Datasheet
47Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 450 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 500A 1250V SIZE 73 Flush End In Thread
Datasheet
6Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 500 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 73 US LONG BL 350A
Datasheet
16Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 73 US LONG BL 400A
Datasheet
9Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 73 US LONG BL 450A
Datasheet
5Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 73 US LONG BL 550A
Datasheet
19Factory Stock Available
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Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 25A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
189Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 25 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 150A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
36Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Round Body Blade Fuses 150 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
31Factory Stock Available
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Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 80 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 125A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
67Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 125 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 250A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
8Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 250 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 300A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
11Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 300 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 800A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
11Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 800 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 20A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
48Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 20 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 25A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
179Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 25 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 35A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
37Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 35 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
36Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 40 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 150A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
115Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 150 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 350A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 350 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 500A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
10Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 500 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 5A 600VAC VDC FF KLC POWR-SPEED
Datasheet
10Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 5 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 20A 600VAC VDC FF KLC POWR-SPEED
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 20 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 600VAC VDC FF KLC POWR-SPEED
Datasheet
16Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

KLC Specialty Fuses Cartridge Blade Fuses 40 A 600 VAC 200 kA at 600 VAC Stud Bolt Down Fast Blow Without Indicator Bulk