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 450A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
5In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 450 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 1000V SIZE 70 Flush End Mtrc Thred
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 80 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 70 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 200 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 70 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 250A 1000V SIZE 70 Flush End Mtrc Thred
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 250 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 70 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 200A 1000V SIZE 70 Flush End In Thread
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 200 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 70 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 700A 1250V SIZE 73 Flush End Mtrc Thred
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 700 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 700A 1250V SIZE 73 Flush End In Thread
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 700 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 15A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
5In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 15 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 30A 150VAC 150VDC FF L15S POWR-SPEED
Datasheet
10In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 30 A 150 VAC 150 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 350A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
3In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 350 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 500A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 500 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 20A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Fuses 20 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Ferrule Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 30A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
2In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 30 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
11In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 40 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 200A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
10In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 200 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 50A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L70S Specialty Fuses Round Body Blade Fuses 50 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 100A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L70S Specialty Fuses Round Body Blade Fuses 100 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 1000A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 1 kA 150 VAC 100 VDC 100 kA at 150 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 70A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
7In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 70 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 800A 700V SIZE 33 Flush End Mtrc Thred
Datasheet
3In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 800 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 33 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 70 US LONG BL 250A
Datasheet
2In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 125A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
7On Order
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 125 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 35A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
12Expected 2026/06/23
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 35 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 70 US LONG BL 50A
Datasheet
4Expected 2026/02/18
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 20A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
20On Order
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 20 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk