PSX Powr-Speed® High-Speed Square Body Fuses

Littelfuse PSX Powr-Speed® High-Speed Square Body Fuses are extremely fast-acting, offering high-speed performance up to 1500VDC, ranging from 80A to 1400A in small NH XL package sizes. The PSX series is available with multiple mounting terminations, including bolted-blade, DIN-blade, and metric flush-end styles. Visual blown fuse indication is standard on all fuses, and an optional micro-switch is available for external indication. These fuses are certified to UL248-13 and designed to meet EN high-speed semiconductor fuse standards and future battery protection fuse standards. Littelfuse PSX Powr-Speed High-Speed Square Body Fuses are specially designed to protect battery energy storage systems (BESS) and photovoltaic inverters. These fuses are also ideal for DC applications such as DC common bus systems, larger industrial regenerative drives, rectifiers, and metal processing equipment.

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Qty. RoHS ECAD Model Series
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Voltage Rating DC
Interrupt Rating
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Littelfuse Specialty Fuses SQB SIZE 1XL BOLTED BL 400A
Datasheet
6In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 400 A 1.5 kVDC 200 kA Screw Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 125A
Datasheet
14In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 125 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL FLUSH 1000A
Datasheet
4In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Fuses 1 kA 1.5 kVDC 200 kA Stud Threaded Stud Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 630A
Datasheet
15In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 630 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL FLUSH 550A
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Fuses 550 A 1.5 kVDC 200 kA Stud Threaded Stud Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL BOLTED BL 80A
Datasheet
2In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 80 A 1.5 kVDC 200 kA Screw Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 100A
Datasheet
2In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 100 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 80A
Datasheet
15In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 80 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 250A
Datasheet
11In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 250 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL DIN BL 1000A
Datasheet
5In Stock
82Expected 3/17/2026
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 1 kA 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 200A
Datasheet
2In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 200 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL BOLTED BL 700A
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 700 A 1.5 kVDC 200 kA Screw Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL DIN BL 1250A
Datasheet
2Expected 3/17/2026
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 1.25 kA 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL DIN BL 1400A
Datasheet
5Expected 3/17/2026
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 1.4 kA 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL BOLTED BL 200A
Datasheet
2.646Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 200 A 1.5 kVDC 200 kA Screw Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL FLUSH 1250A
Datasheet
155Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Fuses 1.25 kA 1.5 kVDC 200 kA Stud Threaded Stud Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL BOLTED BL 1000A
Datasheet
14Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 1 kA 1.5 kVDC 200 kA Screw Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 3XL BOLTED BL 1100A
Datasheet
4.753Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 1.1 kA 1.5 kVDC 200 kA Screw Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 160A
Datasheet
72Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 160 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 315A
Datasheet
23Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 315 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 400A
Datasheet
1Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 400 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 450A
Datasheet
5Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 450 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 500A
Datasheet
43Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 500 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL DIN BL 550A
Datasheet
15Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Blade Fuses 550 A 1.5 kVDC 200 kA DIN Blade Visual Blown Fuse Bulk
Littelfuse Specialty Fuses SQB SIZE 1XL FLUSH 80A
Datasheet
11Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

PSX Specialty Fuses Square Body Fuses 80 A 1.5 kVDC 200 kA Stud Threaded Stud Visual Blown Fuse Bulk