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
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Resistance
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 US SHRT BL 400A
Datasheet
15Factory 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 POWR-SPEED SQB SIZE 30 US SHRT BL 450A
Datasheet
9Factory 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 POWR-SPEED SQB SIZE 30 US SHRT BL 550A
Datasheet
9Factory 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 POWR-SPEED SQB SIZE 30 US SHORT BL 630A
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 110MM 250A
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 250 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 110MM 400A
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 400 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 110MM 450A
Datasheet
15Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 450 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 110MM 700A
Datasheet
20Factory Stock Available
More Info Available
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 700 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 110MM 800A
Datasheet
3Factory Stock Available
More Info Available
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 800 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 80MM 200A
Datasheet
27Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 200 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 80MM 250A
Datasheet
15Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 250 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 80MM 350A
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 350 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 80MM 400A
Datasheet
9Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 400 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 80MM 800A
Datasheet
6Factory Stock Available
More Info Available
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 800 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Box
Littelfuse Specialty Fuses 315A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 315 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 400A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
276Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 400 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 500A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
122Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 500 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 550A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
3Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 550 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 800A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
9Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 800 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 315A 700V SIZE 31 Flush End In. Thred
Datasheet
1Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 315 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 350A 700V SIZE 31 Flush End In. Thred
Datasheet
33Factory Stock Available
More Info Available
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 450A 700V SIZE 31 Flush End In. Thred
Datasheet
15Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 450 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 550A 700V SIZE 31 Flush End In. Thred
Datasheet
18Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 550 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 US LONG BL 200A
Datasheet
6Factory 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 POWR-SPEED SQB SIZE 31 US LONG BL 250A
Datasheet
9Factory 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