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
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Voltage Rating DC
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Indicator Style
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Series
Littelfuse Industrial & Electrical Fuses 1KV SIZE 32 SB 1400A
Datasheet
13Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 1.4 kA Fast-Acting Fuses Knife Blade Class aR Fuses 32 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 32 US LONG BL 1500A
Datasheet
7Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 1.5 kA Fast-Acting Fuses Knife Blade Class aR Fuses 32 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 71 DIN 110MM 500A
Datasheet
13Factory Stock Available
More Info Available
Min.: 3
Mult.: 3

Semiconductor Fuses 500 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 900V FAST BLOW 500A
Datasheet
3Factory Stock Available
More Info Available
Min.: 3
Mult.: 3

Semiconductor Fuses 500 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 550A
Datasheet
9Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 550 A Fast-Acting Fuses Knife Blade Class aR Fuses 71 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 DIN 110MM 700A
Datasheet
26Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 700 A 1.3 kVAC Fast-Acting Fuses 900 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 72 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 DIN 110MM 900A
Datasheet
2Factory Stock Available
More Info Available
Min.: 1
Mult.: 1

Semiconductor Fuses 900 A 1.05 kVAC Fast-Acting Fuses 900 VDC 100 kA, 150 kA Blade / Bolt Class aR Fuses 72 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 900V FAST BLOW 700A
Datasheet
2Factory Stock Available
More Info Available
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 POWR-SPEED SQB SIZE 72 US LONG BL 1000A
Datasheet
7Factory Stock Available
More Info Available
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 800A
Datasheet
2Factory Stock Available
More Info Available
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 1100A
Datasheet
4Factory Stock Available
More Info Available
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 400A 1250V SIZE 73 Flush End In Thread
Datasheet
24Factory Stock Available
More Info Available
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 500A 1250V SIZE 73 Flush End In Thread
Datasheet
2Factory Stock Available
More Info Available
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 900V FAST BLOW 900A
Datasheet
9Factory Stock Available
More Info Available
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 POWR-SPEED SQB SIZE 33 DIN 80MM 500A
Datasheet
Non-Stocked Lead-Time 11 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 500 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 33 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses 315A 1250VAC SIZE 71 POWER-SPEED FLUSH M
Datasheet
Non-Stocked Lead-Time 11 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 POWR-SPEED SQB SIZE 73 US LONG BL 315A
Datasheet
Non-Stocked Lead-Time 11 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 315 A Fast-Acting Fuses Knife Blade Class aR Fuses 73 Visual Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 40A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 40 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 50A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 50 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 63A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 63 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 80A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 80 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 100A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 100 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 125A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 125 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 160A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 160 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR
Littelfuse Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 DIN 110MM 200A
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 1
Mult.: 1

Semiconductor Fuses 200 A 700 VAC Fast-Acting Fuses 600 VDC 150 kA, 200 kA Blade / Bolt Class aR Fuses 30 Visual Side Indicator Bulk PSR