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 POWR-SPEED SQB SIZE 31 DIN 110MM 500A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 500 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 550A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 550 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 630A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 630 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 900A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 900 A 700 VAC 550 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 31 DIN 80MM 315A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 315 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 450A
Datasheet
Non-Stocked Lead-Time 18 Weeks
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 80MM 500A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 500 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 550A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 550 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 630A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 630 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 700A
Datasheet
Non-Stocked Lead-Time 15 Weeks
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 80MM 900A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 3
Mult.: 3

PSR Specialty Fuses Square Body Fuses 900 A 700 VAC 550 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 200A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 200 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 250A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 250 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 450A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 18 Weeks
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 630A 700V SIZE 31 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 14 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 630 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 200A 700V SIZE 31 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 200 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 250A 700V SIZE 31 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 250 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 400A 700V SIZE 31 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
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 In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
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 630A 700V SIZE 31 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 630 A 700 VAC 600 VDC Holder Quick Connect Fast Blow 31 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 700A 700V SIZE 31 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
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 800A 700V SIZE 31 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
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 POWR-SPEED SQB SIZE 31 US LONG BL 315A
Datasheet
Non-Stocked Lead-Time 18 Weeks
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 350A
Datasheet
Non-Stocked Lead-Time 18 Weeks
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 450A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Blade Fuses Screw Knife Blade Fast Blow Visual Blown Fuse Box