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
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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 70 US LONG BL 125A
Datasheet
Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 125 A Fast-Acting Fuses Knife Blade Class aR Fuses 70 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 250A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 250 A Fast-Acting Fuses Knife Blade Class aR Fuses 70 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 280A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 280 A Fast-Acting Fuses Knife Blade Class aR Fuses 70 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 315A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 315 A Fast-Acting Fuses Knife Blade Class aR Fuses 70 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 400A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A Fast-Acting Fuses Knife Blade Class aR Fuses 70 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 DIN 110MM 250A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 250 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 DIN 110MM 280A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 280 A 1.3 kVAC Fast-Acting Fuses 1 kVDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 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 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 DIN 110MM 550A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 550 A 1.2 kVAC Fast-Acting Fuses 900 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 DIN 110MM 630A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 630 A 1.1 kVAC Fast-Acting Fuses 900 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 200A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 200 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 250A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 250 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 350A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 350 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 450A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 250A 1250VAC SIZE 71 POWER-SPEED FLUSH I
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 250 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 280A 700V SIZE 71 Flush End In. Thred
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 280 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 315A 1250VAC SIZE 71 POWER-SPEED FLUSH I
Datasheet
Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 315 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 400A 1250VAC SIZE 71 POWER-SPEED FLUSH IN
Datasheet
Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 400 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 450A 1250VAC SIZE 71 POWER-SPEED FLUSH I
Datasheet
Non-Stocked Lead-Time 25 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 450 A 1.3 kVAC Fast-Acting Fuses 1 kVDC Quick Connect Class aR Fuses 71 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 US LONG BL 160A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 160 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 US LONG BL 200A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 200 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 US LONG BL 280A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 280 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 US LONG BL 350A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 350 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 US LONG BL 450A
Datasheet
Non-Stocked Lead-Time 15 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 450 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 630A
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 3
Mult.: 3

Semiconductor Fuses 630 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR