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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Voltage Rating AC
Fuse Type
Voltage Rating DC
Interrupt Rating
Termination Style
Class
Fuse Size/Group
Indicator Style
Packaging
Series
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 US LONG BL 350A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 350 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 US LONG BL 400A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 US LONG BL 450A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 700V SIZE 72 US LONG BL 500
Datasheet
Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 500 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 700V SIZE 72 US LONG BL 550
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 550 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 US LONG BL 630A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 630 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 700A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 700 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 800A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 800 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 US LONG BL 900A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 900 A Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 US LONG BL 1000A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1 kA Fast-Acting Fuses Knife Blade Class aR Fuses 72 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 315A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 315 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 350A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 350 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 400A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 450A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 500A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 500 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 550A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 550 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 630A
Datasheet
Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 630 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 700A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 700 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 800A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 800 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 900A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 900 A 1.05 kVAC Fast-Acting Fuses 800 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 1000A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1 kA 1.05 kVAC Fast-Acting Fuses 800 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 1100A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.1 kA 1.05 kVAC Fast-Acting Fuses 800 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 1250A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.25 kA 1 kVAC Fast-Acting Fuses 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 DIN 110MM 1400A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.4 kA 1 kVAC Fast-Acting Fuses 100 kA, 150 kA Blade / Bolt Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 315A 1250V SIZE 73 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 315 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR