PSR High-Speed Square Body Fuses

Littelfuse PSR Series High-Speed Square Body Fuses are specially designed for the protection of power semiconductor devices. The fuses from Littelfuse combine extreme current limitation benefits with balanced performance levels to meet the precise requirements for protecting sensitive power electronics devices. These devices include diodes, triacs, IGBTs, SCRs, MOSFETs, and other solid-state devices that are typically designed for power conversion and power conditioning equipment.

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Qty. RoHS ECAD Model Series
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Voltage Rating AC
Voltage Rating DC
Interrupt Rating
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Fuse Size/Group
Indicator Style
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Resistance
Littelfuse Specialty Fuses 630A 1250V SIZE 73 Flush End Mtrc Thred
Datasheet
2Factory Stock Available
More Info Available
Min.: 2
Mult.: 2

PSR Specialty Fuses Square Body Fuses 630 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 315A 1250V SIZE 73 Flush End In Thread
Datasheet
14Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 315 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 400A 1250V SIZE 73 Flush End In Thread
Datasheet
24Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 400 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 450A 1250V SIZE 73 Flush End In Thread
Datasheet
47Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 450 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses 500A 1250V SIZE 73 Flush End In Thread
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 500 A 1.3 kVAC 1 kVDC 100 kA, 150 kA Stud Threaded Stud Fast Blow 73 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 73 US LONG BL 350A
Datasheet
16Factory 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 73 US LONG BL 400A
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 73 US LONG BL 450A
Datasheet
5Factory 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 73 US LONG BL 550A
Datasheet
19Factory 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 33 DIN 80MM 500A
Datasheet
Non-Stocked Lead-Time 11 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 33 Visual Side Indicator Box
Littelfuse Specialty Fuses 1000V SIZE 70 LONG BL 100A
Datasheet
5Expected 4/2/2026
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 DIN 110MM 40A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 40 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 50A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 50 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 125A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 125 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 160A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 160 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 350A
Datasheet
Non-Stocked Lead-Time 21 Weeks
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 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 450A
Datasheet
Non-Stocked Lead-Time 21 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 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 630A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 630 A 700 VAC 550 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Bulk
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 50A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 50 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 125A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 125 A 700 VAC 600 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 315A
Datasheet
Non-Stocked Lead-Time 21 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 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 400A
Datasheet
Non-Stocked Lead-Time 21 Weeks
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 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 450A
Datasheet
Non-Stocked Lead-Time 21 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 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 500A
Datasheet
Non-Stocked Lead-Time 21 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 30 Visual Side Indicator Box
Littelfuse Specialty Fuses POWR-SPEED SQB SIZE 30 DIN 80MM 630A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

PSR Specialty Fuses Square Body Fuses 630 A 700 VAC 550 VDC 150 kA, 200 kA Screw Blade / Boltdown Fast Blow 30 Visual Side Indicator Bulk