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 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 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 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 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 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 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
Littelfuse Specialty Fuses 50A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
25In 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 90A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 90 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 10A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1
L70S Specialty Fuses Round Body Blade Fuses 10 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 60A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
5In Stock
Min.: 1
Mult.: 1
L70S Specialty Fuses Round Body Blade Fuses 60 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 450A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 450 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 350A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 350 A 500 VAC 450 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 800A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
6In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 800 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 225A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 225 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 25A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
2In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 25 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 125A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
10In Stock
Min.: 1
Mult.: 1
L70S Specialty Fuses Round Body Blade Fuses 125 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 35A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1
L50S Specialty Fuses Round Body Blade Fuses 35 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 15A 700VAC 650VDC FF L70S POWR-SPEED
Datasheet
2In Stock
Min.: 1
Mult.: 1
L70S Specialty Fuses Round Body Blade Fuses 15 A 700 VAC 650 VDC 20 kA at 650 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 100A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
71In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 100 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 125A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
44In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 125 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 30.94 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 150A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
50In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 150 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 30.94 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 200A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
52In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 200 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 30.94 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 250A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
30In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 250 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