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 Product
Current Rating
Voltage Rating AC
Fuse Type
Voltage Rating DC
Interrupt Rating
Termination Style
Class
Fuse Size/Group
Indicator Style
Packaging
Series
Littelfuse Industrial & Electrical Fuses 350A 1250V SIZE 73 Flush End Mtrc Thred
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 Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 400A 1250V SIZE 73 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 14 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 450A 1250V SIZE 73 Flush End Mtrc Thred
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 Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 500A 1250V SIZE 73 Flush End Mtrc Thred
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 Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 550A 1250V SIZE 73 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 2
Mult.: 2

Semiconductor Fuses 550 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 630A 1250V SIZE 73 Flush End Mtrc Thred
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 2
Mult.: 2

Semiconductor Fuses 630 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 315A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 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
Littelfuse Industrial & Electrical Fuses 350A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 350 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 400A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 450A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 500A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 500 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 550A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 2
Mult.: 2

Semiconductor Fuses 550 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 630A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 2
Mult.: 2

Semiconductor Fuses 630 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 700A 1250V SIZE 73 Flush End In Thread
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 700 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Threaded Class aR Fuses 73 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 US LONG BL 350A
Datasheet
Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 350 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 US LONG BL 400A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 US LONG BL 450A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 US LONG BL 500A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 500 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 US LONG BL 550A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 550 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 73 US LONG BL 630A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 630 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 900A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 900 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 1000A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1 kA Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 1100A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.1 kA Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 1250A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.25 kA Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 1400A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 1.4 kA Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR