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, including DC common bus systems, larger industrial regenerative drives, rectifiers, and metal processing equipment.

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Interrupt Rating
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Mounting Style
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Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 630A
Datasheet
12In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 630 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 125A
Datasheet
14In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 125 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 100A
Datasheet
2In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 100 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 80A
Datasheet
5In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 80 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL FLUSH 550A
Datasheet
1In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 550 A 1.5 kVDC 200 kA Square Body Fuses Stud Threaded Stud Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 250A
Datasheet
11In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 250 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk


Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL BOLTED BL 400A
Datasheet
7In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 400 A 1.5 kVDC 200 kA Square Body Blade Fuses Screw Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 1400A
Datasheet
5In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 1.4 kA 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 200A
Datasheet
2In Stock
Min.: 1
Mult.: 1

PSX Specialty Fuses 200 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk


Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL FLUSH 1000A
Datasheet
1In Stock
Min.: 1
Mult.: 1

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

PSX Specialty Fuses 700 A 1.5 kVDC 200 kA Square Body Blade Fuses Screw Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 1000A
Datasheet
123Expected 5/20/2026
Min.: 1
Mult.: 1

PSX Specialty Fuses 1 kA 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 1250A
Datasheet
2Expected 5/20/2026
Min.: 1
Mult.: 1

PSX Specialty Fuses 1.25 kA 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL BOLTED BL 200A
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 200 A 1.5 kVDC 200 kA Square Body Blade Fuses Screw Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL FLUSH 1250A
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 1.25 kA 1.5 kVDC 200 kA Square Body Fuses Stud Threaded Stud Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL FLUSH 1400A
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 1.4 kA 1.5 kVDC 200 kA Square Body Fuses Stud Threaded Stud Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 800A
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 800 A 1.5 kVDC 200 kA Square Body Blade Fuses Screw Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 1000A
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 1 kA 1.5 kVDC 200 kA Square Body Blade Fuses Screw Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 1100A
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 1.1 kA 1.5 kVDC 200 kA Square Body Blade Fuses Screw Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 160A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 160 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 280A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 280 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 315A
Datasheet
Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 315 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 350A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 350 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 400A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 400 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 450A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

PSX Specialty Fuses 450 A 1.5 kVDC 200 kA Square Body Blade Fuses DIN Blade Visual Blown Fuse Bulk