Industrial & Electrical Fuses

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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (IDR) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Current Rating	Voltage Rating AC	Fuse Type	Voltage Rating DC	Interrupt Rating	Body Style	Mounting Style	Termination Style	Class	Fuse Size/Group	Indicator Style	Packaging	Series
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 200A PSR070UL0200Z Littelfuse 1: Rp6.576.123,70 18In Stock	Mfr. Part No. PSR070UL0200Z Mouser Part No 576-PSR070UL0200Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 200A Learn More about Littelfuse psr fuses	Datasheet	18In Stock	Rp6.576.123,70 Rp5.793.666,80 Rp5.609.839,88	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	70	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 DIN 110MM 500A PSR072DL0500X Littelfuse 1: Rp8.663.531,58 5In Stock	Mfr. Part No. PSR072DL0500X Mouser Part No 576-PSR072DL0500X	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 DIN 110MM 500A Learn More about Littelfuse psr fuses	Datasheet	5In Stock	Rp8.663.531,58 Rp7.315.284,04 Rp7.269.052,12 Quote Quote	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	72	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred PSR070FL0200Z Littelfuse 1: Rp7.497.643,28 1In Stock	Mfr. Part No. PSR070FL0200Z Mouser Part No 576-PSR070FL0200Z	Littelfuse	Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp7.497.643,28 Rp6.211.772,14 Rp5.724.685,84	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA			Threaded	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB Size 32 US LONG BL 400A PSR032UL0400X Littelfuse 1: Rp6.829.298,50 2In Stock	Mfr. Part No. PSR032UL0400X Mouser Part No 576-PSR032UL0400X	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB Size 32 US LONG BL 400A Learn More about Littelfuse psr fuses	Datasheet	2In Stock	Rp6.829.298,50 Rp5.164.765,92 Rp4.941.311,64 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	400 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	32	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 900V FAST BLOW 800A PSR073UL0800X Littelfuse 1: Rp11.478.174,90 3In Stock 3Expected 31/03/2027	Mfr. Part No. PSR073UL0800X Mouser Part No 576-PSR073UL0800X	Littelfuse	Industrial & Electrical Fuses 900V FAST BLOW 800A	Datasheet	3In Stock 3Expected 31/03/2027	Rp11.478.174,90 Rp9.424.890,58 Rp8.576.755,00	Min.: 1 Mult.: 1	Semiconductor Fuses	800 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	73	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 DIN 110MM 50A PSR070DL0050Z Littelfuse 1: Rp7.092.380,14 19In Stock	Mfr. Part No. PSR070DL0050Z Mouser Part No 576-PSR070DL0050Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 DIN 110MM 50A Learn More about Littelfuse psr fuses	Datasheet	19In Stock	Rp7.092.380,14 Rp5.875.856,88 Rp5.415.372,28	Min.: 1 Mult.: 1	Semiconductor Fuses	50 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA			Blade / Bolt	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 900V FAST BLOW 350A PSR070UL0350Z Littelfuse 1: Rp9.061.639,78 10In Stock	Mfr. Part No. PSR070UL0350Z Mouser Part No 576-PSR070UL0350Z	Littelfuse	Industrial & Electrical Fuses 900V FAST BLOW 350A	Datasheet	10In Stock	Rp9.061.639,78 Rp7.440.587,22 Rp6.771.141,68	Min.: 1 Mult.: 1	Semiconductor Fuses	350 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	70	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 1000V SIZE 70 LONG BL 100A PSR070UL0100Z Littelfuse 1: Rp7.293.635,76 1In Stock	Mfr. Part No. PSR070UL0100Z Mouser Part No 576-PSR070UL0100Z	Littelfuse	Industrial & Electrical Fuses 1000V SIZE 70 LONG BL 100A Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp7.293.635,76 Rp6.118.941,38 Rp5.638.643,10	Min.: 1 Mult.: 1	Semiconductor Fuses	100 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	70	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 125A 700VAC SIZE 30 POWER-SPEED FLUSH M PSR030FL0125Z Littelfuse 1: Rp4.148.397,52 1In Stock	Mfr. Part No. PSR030FL0125Z Mouser Part No 576-PSR030FL0125Z	Littelfuse	Industrial & Electrical Fuses 125A 700VAC SIZE 30 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp4.148.397,52 Rp3.234.583,26 Rp3.156.062,38 Rp3.004.707,88	Min.: 1 Mult.: 1	Semiconductor Fuses	125 A	700 VAC	Fast-Acting Fuses	600 VDC				Quick Connect	Class aR Fuses	30	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 200A 700VAC SIZE 30 POWER-SPEED FLUSH M PSR030FL0200Z Littelfuse 1: Rp4.510.731,02 3In Stock	Mfr. Part No. PSR030FL0200Z Mouser Part No 576-PSR030FL0200Z	Littelfuse	Industrial & Electrical Fuses 200A 700VAC SIZE 30 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	3In Stock	Rp4.510.731,02 Rp3.739.281,72 Rp3.447.396,86 Rp2.848.766,88	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A	700 VAC	Fast-Acting Fuses	600 VDC				Quick Connect	Class aR Fuses	30	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 80A 1000V SIZE 70 Flush End Mtrc Thred PSR070FL0080Z Littelfuse 1: Rp6.972.030,38 1In Stock	Mfr. Part No. PSR070FL0080Z Mouser Part No 576-PSR070FL0080Z	Littelfuse	Industrial & Electrical Fuses 80A 1000V SIZE 70 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp6.972.030,38 Rp5.800.454,82 Rp5.461.787,66 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	80 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA			Threaded	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 250A 1000V SIZE 70 Flush End Mtrc Thred PSR070FL0250Z Littelfuse 1: Rp7.692.661,26 1In Stock	Mfr. Part No. PSR070FL0250Z Mouser Part No 576-PSR070FL0250Z	Littelfuse	Industrial & Electrical Fuses 250A 1000V SIZE 70 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp7.692.661,26 Rp6.435.776,80 Rp6.059.683,80	Min.: 1 Mult.: 1	Semiconductor Fuses	250 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA			Threaded	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End In Thread PSR070FS0200Z Littelfuse 1: Rp7.497.643,28 1In Stock	Mfr. Part No. PSR070FS0200Z Mouser Part No 576-PSR070FS0200Z	Littelfuse	Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End In Thread Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp7.497.643,28 Rp6.211.772,14 Rp5.724.685,84	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA			Threaded	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 50A PSR070UL0050Z Littelfuse 1: Rp7.103.754,66 1In Stock	Mfr. Part No. PSR070UL0050Z Mouser Part No 576-PSR070UL0050Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 50A Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp7.103.754,66 Rp5.772.568,90 Rp5.319.239,24 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	50 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	70	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 400A 1250VAC SIZE 71 POWER-SPEED FLUSH M PSR071FL0400Z Littelfuse 1: Rp7.497.643,28 3In Stock	Mfr. Part No. PSR071FL0400Z Mouser Part No 576-PSR071FL0400Z	Littelfuse	Industrial & Electrical Fuses 400A 1250VAC SIZE 71 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	3In Stock	Rp7.497.643,28 Rp6.211.772,14 Rp5.724.685,84	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
Industrial & Electrical Fuses 700A 1250V SIZE 73 Flush End Mtrc Thred PSR073FL0700Z Littelfuse 1: Rp9.797.497,84 1In Stock	Mfr. Part No. PSR073FL0700Z Mouser Part No 576-PSR073FL0700Z	Littelfuse	Industrial & Electrical Fuses 700A 1250V SIZE 73 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp9.797.497,84 Rp8.030.961,50 Rp7.497.459,82 Quote Quote	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
Industrial & Electrical Fuses 700A 700V SIZE 31 Flush End Mtrc Thred PSR031FL0700Z Littelfuse 1: Rp6.746.924,96 1In Stock	Mfr. Part No. PSR031FL0700Z Mouser Part No 576-PSR031FL0700Z	Littelfuse	Industrial & Electrical Fuses 700A 700V SIZE 31 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	Rp6.746.924,96 Rp5.275.759,22 Rp5.027.170,92 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	700 A	700 VAC	Fast-Acting Fuses	600 VDC				Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred PSR070FL0200ZDN Littelfuse 1: Rp4.199.032,48 12Expected 04/02/2027 New Product	Mfr. Part No. PSR070FL0200ZDN Mouser Part No 576-PSR070FL0200ZDN New Product	Littelfuse	Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred	Datasheet	12Expected 04/02/2027	Rp4.199.032,48 Rp3.480.786,58 Rp3.209.082,32 Rp2.651.730,84	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA	Square Body Fuses	Screw	Threaded	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 250A 1000V SIZE 70 Flush End Mtrc Thred PSR070FL0250ZDN Littelfuse 1: Rp4.227.652,24 12Expected 04/02/2027 New Product	Mfr. Part No. PSR070FL0250ZDN Mouser Part No 576-PSR070FL0250ZDN New Product	Littelfuse	Industrial & Electrical Fuses 250A 1000V SIZE 70 Flush End Mtrc Thred	Datasheet	12Expected 04/02/2027	Rp4.227.652,24 Rp3.504.636,38 Rp3.231.097,52 Rp2.669.893,38	Min.: 1 Mult.: 1	Semiconductor Fuses	250 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC	100 kA, 150 kA	Square Body Fuses	Screw	Threaded	Class aR Fuses	70	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 900V FAST BLOW 700A PSR073UL0700X Littelfuse 1: Rp9.740.808,70 11Expected 11/02/2027	Mfr. Part No. PSR073UL0700X Mouser Part No 576-PSR073UL0700X	Littelfuse	Industrial & Electrical Fuses 900V FAST BLOW 700A Learn More about Littelfuse psr fuses	Datasheet	11Expected 11/02/2027	Rp9.740.808,70 Rp8.968.992,48 Rp8.752.326,22 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	700 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	73	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 350A 700VAC SIZE 30 POWER-SPEED FLUSH M PSR030FL0350Z Littelfuse 1: Rp4.940.394,34 3Expected 21/12/2026	Mfr. Part No. PSR030FL0350Z Mouser Part No 576-PSR030FL0350Z	Littelfuse	Industrial & Electrical Fuses 350A 700VAC SIZE 30 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	3Expected 21/12/2026	Rp4.940.394,34 Rp4.095.377,58 Rp3.775.790,26 Rp3.120.104,22	Min.: 1 Mult.: 1	Semiconductor Fuses	350 A	700 VAC	Fast-Acting Fuses	600 VDC				Quick Connect	Class aR Fuses	30	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 350A 700V SIZE 31 Flush End Mtrc Thred PSR031FL0350Z Littelfuse 1: Rp5.666.895,94 1Expected 01/04/2027	Mfr. Part No. PSR031FL0350Z Mouser Part No 576-PSR031FL0350Z	Littelfuse	Industrial & Electrical Fuses 350A 700V SIZE 31 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1Expected 01/04/2027	Rp5.666.895,94 Rp4.597.324,14 Rp4.373.502,94	Min.: 1 Mult.: 1	Semiconductor Fuses	350 A	700 VAC	Fast-Acting Fuses	600 VDC				Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 US LONG BL 630A PSR030UL0630Z Littelfuse 1: Rp5.997.674,32 3Factory Stock Available	Mfr. Part No. PSR030UL0630Z Mouser Part No 576-PSR030UL0630Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 US LONG BL 630A	Datasheet	3Factory Stock Available More Info Available	Rp5.997.674,32 Rp4.865.175,74 Rp4.484.129,32	Min.: 1 Mult.: 1	Semiconductor Fuses	630 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	30	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 US SHORT BL 630A PSR030US0630Z Littelfuse 1: Rp6.010.149,60 3Factory Stock Available	Mfr. Part No. PSR030US0630Z Mouser Part No 576-PSR030US0630Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 30 US SHORT BL 630A	Datasheet	3Factory Stock Available More Info Available	Rp6.010.149,60 Rp4.875.999,88 Rp4.224.716,88 Rp3.995.391,88	Min.: 1 Mult.: 1	Semiconductor Fuses	630 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	30	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 900A PSR031UL0900Z Littelfuse 3: Rp8.054.811,30 3Factory Stock Available	Mfr. Part No. PSR031UL0900Z Mouser Part No 576-PSR031UL0900Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 900A	Datasheet	3Factory Stock Available More Info Available	Rp8.054.811,30 Rp6.613.916,46 Rp6.018.772,22	Min.: 3 Mult.: 3	Semiconductor Fuses	900 A		Fast-Acting Fuses					Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR