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
Product
Body Style
Current Rating
Voltage Rating AC
Voltage Rating DC
Interrupt Rating
Mounting Style
Termination Style
Fuse Type
Fuse Size/Group
Indicator Style
Packaging
Resistance
Littelfuse Specialty Fuses 100A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
16Expected 2026/02/25
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 100 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 10A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
10Expected 2026/04/09
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 10 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 50A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
12Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 50 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 400A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
11Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 400 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 50A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
93Stock Available
More Info Available
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 50 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 300A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
63Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 300 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 1000V SIZE 70 LONG BL 100A
Datasheet
96Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 315A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
582Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 315 A 1.3 kVAC 1 kVDC Snap In Quick Connect Fast Blow 71 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 73 US LONG BL 315A
Datasheet
469Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 40A 150VAC VDC FF L15S POWR-SPEED
Datasheet
53Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Cartridge Fuses 40 A 150 VAC 100 VDC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 50A 150VAC VDC FF L15S POWR-SPEED
Datasheet
2Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Cartridge Fuses 50 A 150 VAC 100 VDC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 60A 150VAC VDC FF L15S POWR-SPEED
Datasheet
34Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L15S Specialty Fuses Cartridge Fuses 60 A 150 VAC 100 VDC Holder Clip Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 45A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
10Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 45 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 70A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
1Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 70 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
33Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 80 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 90A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
23Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 90 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 100A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
66Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 100 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 175A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 175 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 225A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 225 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 250A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 250 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 350A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 350 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 450A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
13Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 450 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 500A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
1Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 500 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 325A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
7Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 325 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 38.1 mm x 110.31 mm Without Indicator Bulk
Littelfuse Specialty Fuses 90A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
14Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 90 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk