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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Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 630A
Datasheet
9In Stock
Min.: 1
Mult.: 1

Semiconductor Fuses 630 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 1400A
Datasheet
5In Stock
Min.: 1
Mult.: 1

Semiconductor Fuses 1.4 kA Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 125A
Datasheet
13In Stock
Min.: 1
Mult.: 1

Semiconductor Fuses 125 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL FLUSH 450A
Datasheet
6In Stock
12Expected 8/21/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A Fast-Acting Fuses 1.5 kVDC 200 kA Threaded Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL FLUSH 550A
Datasheet
1In Stock
Min.: 1
Mult.: 1

Semiconductor Fuses 550 A Fast-Acting Fuses 1.5 kVDC 200 kA Threaded Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 700A
Datasheet
1In Stock
Min.: 1
Mult.: 1

Semiconductor Fuses 700 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 1000A
Datasheet
112Expected 8/13/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 1 kA Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL BOLTED BL 200A
Datasheet
12Expected 9/3/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 200 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX


Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL BOLTED BL 400A
Datasheet
10Expected 10/27/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 800A
Datasheet
5Expected 8/13/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 800 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 1250A
Datasheet
2Expected 10/12/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 1.25 kA Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 250A
Datasheet
4Expected 12/7/2026
Min.: 1
Mult.: 1

Semiconductor Fuses 250 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL FLUSH 1250A
Datasheet
69Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 1.25 kA Fast-Acting Fuses 1.5 kVDC 200 kA Threaded Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 80A
Datasheet
8Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 80 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 200A
Datasheet
6Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 200 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 315A
Datasheet
17Factory Stock Available
More Info Available
Min.: 12
Mult.: 1

Semiconductor Fuses 315 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 500A
Datasheet
43Factory Stock Available
More Info Available
Min.: 12
Mult.: 1

Semiconductor Fuses 500 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL DIN BL 550A
Datasheet
15Factory Stock Available
More Info Available
Min.: 12
Mult.: 1

Semiconductor Fuses 550 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL FLUSH 100A
Datasheet
12Factory Stock Available
More Info Available
Min.: 12
Mult.: 1

Semiconductor Fuses 100 A Fast-Acting Fuses 1.5 kVDC 200 kA Threaded Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL BOLTED BL 160A
Datasheet
134Factory Stock Available
More Info Available
Min.: 12
Mult.: 1

Semiconductor Fuses 160 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 1XL BOLTED BL 630A
Datasheet
15Factory Stock Available
More Info Available
Min.: 12
Mult.: 1

Semiconductor Fuses 630 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL DIN BL 700A
Datasheet
22Factory Stock Available
More Info Available
Min.: 7
Mult.: 1

Semiconductor Fuses 700 A Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL FLUSH 1400A
Datasheet
Non-Stocked Lead-Time 11 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.4 kA Fast-Acting Fuses 1.5 kVDC 200 kA Threaded Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 1000A
Datasheet
Non-Stocked Lead-Time 11 Weeks
Min.: 7
Mult.: 1

Semiconductor Fuses 1 kA Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX
Littelfuse Industrial & Electrical Fuses SQB SIZE 3XL BOLTED BL 1100A
Datasheet
Non-Stocked Lead-Time 11 Weeks
Min.: 7
Mult.: 1

Semiconductor Fuses 1.1 kA Fast-Acting Fuses 1.5 kVDC 200 kA Blade Visual Indicator Bulk PSX