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 70A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
207In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 70 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
93In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 600 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 50.8 mm x 113.49 mm Without Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 70 US LONG BL 200A
Datasheet
13In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 400A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
41In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 400 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 100A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
19In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 100 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 72 DIN 110MM 500A
Datasheet
7In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 500 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Screw Blade / Boltdown Fast Blow 72 Visual Side Indicator Box
Littelfuse Specialty Fuses 60A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
31In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 60 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 25.4 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 30A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
40In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 30 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 200A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
12In Stock
Min.: 1
Mult.: 1

L70S Specialty Fuses Round Body Blade Fuses 200 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 450A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
5In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 450 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 50.8 mm x 113.49 mm Without Indicator Bulk
Littelfuse Specialty Fuses 35A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
3In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 35 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 40A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
2In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 40 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 200A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 200 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB Size 32 US LONG BL 400A
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 POWR-SPEED SQB SIZE 70 US LONG BL 80A
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box
Littelfuse Specialty Fuses 300A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
2In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 300 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 700A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 700 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 350A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 350 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 250A 700VAC SIZE 30 POWER-SPEED FLUSH M
Datasheet
6In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 250 A 700 VAC 600 VDC Snap In Quick Connect Fast Blow 30 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 400A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
4In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 400 A 1.3 kVAC 1 kVDC Snap In Quick Connect Fast Blow 71 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 125A 700VAC SIZE 30 POWER-SPEED FLUSH M
Datasheet
9In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 125 A 700 VAC 600 VDC Snap In Quick Connect Fast Blow 30 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 50A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
28In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 50 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 25.4 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 300A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
7In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 300 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 150A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 150 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 500A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 500 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk