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 350A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
16In Stock
Min.: 1
Mult.: 1
L70QS Specialty Fuses Round Body Fuses 350 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
20In Stock
Min.: 1
Mult.: 1
L70QS Specialty Fuses Round Body Fuses 600 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 35A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
63In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 35 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 500VDC FF L50QS POWR-SPEED
Datasheet
62In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 90 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 225A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
18In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 225 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 60A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
43In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 60 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
88In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 80 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 500A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
8In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 500 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 250A 150VAC 100VDC FF L15S POWR-SPEED
Datasheet
72In Stock
Min.: 1
Mult.: 1
L15S Specialty Fuses Round Body Blade Fuses 250 A 150 VAC 100 VDC 20 kA at 100 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 250VAC 200VDC FF L25S POWR-SPEED
Datasheet
9In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 600 A 250 VAC 200 VDC 20 kA at 200 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
25In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 80 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 175A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
9In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 175 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 60A 500VAC 450VDC FF L50S POWR-SPEED
Datasheet
13In Stock
Min.: 1
Mult.: 1

L50S Specialty Fuses Round Body Blade Fuses 60 A 500 VAC 450 VDC 20 kA at 450 VDC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 50A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
20In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 50 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 250A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 250 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 300A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
9In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 300 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 630A 1250VAC SIZE 72 POWER-SPEED FLUSH M
Datasheet
4In Stock
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 630 A 1.3 kVAC 1 kVDC Snap In Quick Connect Fast Blow 72 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 60A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
1In Stock
45On Order
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 60 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 125A 250VAC 250VDC FF L25S POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1

L25S Specialty Fuses Round Body Blade Fuses 125 A 250 VAC 250 VDC 20 kA at 250 VDC Stud Bolt Down Fast Blow 5AG Without Indicator Bulk
Littelfuse Specialty Fuses 40A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
7In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 40 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 70A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
17In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 70 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 275A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 275 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 700A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
1In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 700 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 63.5 mm x 157.15 mm Without Indicator Bulk
Littelfuse Specialty Fuses 40A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
3In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 40 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 400A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
4In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 400 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk