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 (JPY) 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	Melting I2t	Termination Style	Class	Fuse Size / Group	Indicator Style	Packaging	Series
Industrial & Electrical Fuses 200A 700V SIZE 31 Flush End In. Thred PSR031FS0200Z Littelfuse 1: ¥45,714 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0200Z Mouser Part # 576-PSR031FS0200Z	Littelfuse	Industrial & Electrical Fuses 200A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥45,714 ¥37,093.5 ¥34,185 ¥28,783.5	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A	700 VAC	Fast-Acting Fuses	600 VDC	1.965 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 250A 700V SIZE 31 Flush End In. Thred PSR031FS0250Z Littelfuse 1: ¥45,714 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0250Z Mouser Part # 576-PSR031FS0250Z	Littelfuse	Industrial & Electrical Fuses 250A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥45,714 ¥37,093.5 ¥34,185 ¥28,783.5	Min.: 1 Mult.: 1	Semiconductor Fuses	250 A	700 VAC	Fast-Acting Fuses	600 VDC	3.789 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 315A 700V SIZE 31 Flush End In. Thred PSR031FS0315Z Littelfuse 1: ¥45,714 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0315Z Mouser Part # 576-PSR031FS0315Z	Littelfuse	Industrial & Electrical Fuses 315A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥45,714 ¥37,093.5 ¥34,185 ¥28,783.5	Min.: 1 Mult.: 1	Semiconductor Fuses	315 A	700 VAC	Fast-Acting Fuses	600 VDC	6.862 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 400A 700V SIZE 31 Flush End In. Thred PSR031FS0400Z Littelfuse 1: ¥45,714 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0400Z Mouser Part # 576-PSR031FS0400Z	Littelfuse	Industrial & Electrical Fuses 400A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥45,714 ¥37,093.5 ¥34,185 ¥28,783.5	Min.: 1 Mult.: 1	Semiconductor Fuses	400 A	700 VAC	Fast-Acting Fuses	600 VDC	14.770 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 450A 700V SIZE 31 Flush End In. Thred PSR031FS0450Z Littelfuse 1: ¥51,429.5 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0450Z Mouser Part # 576-PSR031FS0450Z	Littelfuse	Industrial & Electrical Fuses 450A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥51,429.5 ¥41,731 ¥38,458.8 ¥32,381.2	Min.: 1 Mult.: 1	Semiconductor Fuses	450 A	700 VAC	Fast-Acting Fuses	600 VDC	22.457 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 500A 700V SIZE 31 Flush End In. Thred PSR031FS0500Z Littelfuse 1: ¥51,429.5 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0500Z Mouser Part # 576-PSR031FS0500Z	Littelfuse	Industrial & Electrical Fuses 500A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥51,429.5 ¥41,731 ¥38,458.8 ¥32,381.2	Min.: 1 Mult.: 1	Semiconductor Fuses	500 A	700 VAC	Fast-Acting Fuses	600 VDC	29.751 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 550A 700V SIZE 31 Flush End In. Thred PSR031FS0550Z Littelfuse 1: ¥51,429.5 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0550Z Mouser Part # 576-PSR031FS0550Z	Littelfuse	Industrial & Electrical Fuses 550A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥51,429.5 ¥41,731 ¥38,458.8 ¥32,381.2	Min.: 1 Mult.: 1	Semiconductor Fuses	550 A	700 VAC	Fast-Acting Fuses	600 VDC	42.056 A2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 630A 700V SIZE 31 Flush End In. Thred PSR031FS0630Z Littelfuse 3: ¥61,819.1 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0630Z Mouser Part # 576-PSR031FS0630Z	Littelfuse	Industrial & Electrical Fuses 630A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥61,819.1 ¥51,221.9 ¥47,212.3	Min.: 3 Mult.: 3	Semiconductor Fuses	630 A	700 VAC	Fast-Acting Fuses	600 VDC	73.513 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 700A 700V SIZE 31 Flush End In. Thred PSR031FS0700Z Littelfuse 3: ¥61,819.1 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0700Z Mouser Part # 576-PSR031FS0700Z	Littelfuse	Industrial & Electrical Fuses 700A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥61,819.1 ¥51,221.9 ¥47,212.3	Min.: 3 Mult.: 3	Semiconductor Fuses	700 A	700 VAC	Fast-Acting Fuses	600 VDC	98.187 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses 800A 700V SIZE 31 Flush End In. Thred PSR031FS0800Z Littelfuse 3: ¥61,819.1 Non-Stocked Lead-Time 25 Weeks	Mfr. Part # PSR031FS0800Z Mouser Part # 576-PSR031FS0800Z	Littelfuse	Industrial & Electrical Fuses 800A 700V SIZE 31 Flush End In. Thred Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 25 Weeks	¥61,819.1 ¥51,221.9 ¥47,212.3	Min.: 3 Mult.: 3	Semiconductor Fuses	800 A	700 VAC	Fast-Acting Fuses	600 VDC	137.208 kA2s	Quick Connect	Class aR Fuses	31	Visual Side Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 315A PSR031UL0315Z Littelfuse 1: ¥44,079.6 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031UL0315Z Mouser Part # 576-PSR031UL0315Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 315A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥44,079.6 ¥40,576.6 ¥38,860.8 ¥36,784.5	Min.: 1 Mult.: 1	Semiconductor Fuses	315 A		Fast-Acting Fuses		6.862 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 350A PSR031UL0350Z Littelfuse 1: ¥47,112.6 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031UL0350Z Mouser Part # 576-PSR031UL0350Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 350A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥47,112.6 ¥40,051.7 ¥37,327.7 ¥35,249.7	Min.: 1 Mult.: 1	Semiconductor Fuses	350 A		Fast-Acting Fuses		9.523 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 450A PSR031UL0450Z Littelfuse 1: ¥50,007.7 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031UL0450Z Mouser Part # 576-PSR031UL0450Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 450A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥50,007.7 ¥42,900.3 ¥39,978.6 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	450 A		Fast-Acting Fuses		22.457 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 500A PSR031UL0500Z Littelfuse 1: ¥56,198.3 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031UL0500Z Mouser Part # 576-PSR031UL0500Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 500A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥56,198.3 ¥46,564.5 ¥42,920.2	Min.: 1 Mult.: 1	Semiconductor Fuses	500 A		Fast-Acting Fuses		29.751 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 550A PSR031UL0550Z Littelfuse 1: ¥46,929.9 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031UL0550Z Mouser Part # 576-PSR031UL0550Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 550A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥46,929.9 ¥43,612.9 ¥41,955.2 Quote Quote	Min.: 1 Mult.: 1	Semiconductor Fuses	550 A		Fast-Acting Fuses		42.056 A2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 630A PSR031UL0630Z Littelfuse 3: ¥55,077.1 Non-Stocked Lead-Time 15 Weeks	Mfr. Part # PSR031UL0630Z Mouser Part # 576-PSR031UL0630Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 630A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 15 Weeks	¥55,077.1 ¥50,143.9 ¥48,355 Quote Quote	Min.: 3 Mult.: 3	Semiconductor Fuses	630 A		Fast-Acting Fuses		73.513 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 700A PSR031UL0700Z Littelfuse 3: ¥60,211.3 Non-Stocked Lead-Time 15 Weeks	Mfr. Part # PSR031UL0700Z Mouser Part # 576-PSR031UL0700Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US LONG BL 700A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 15 Weeks	¥60,211.3 ¥50,632.3 ¥47,306.9 Quote Quote	Min.: 3 Mult.: 3	Semiconductor Fuses	700 A		Fast-Acting Fuses		98.187 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 200A PSR031US0200Z Littelfuse 1: ¥50,894.7 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031US0200Z Mouser Part # 576-PSR031US0200Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 200A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥50,894.7 ¥41,284.2 ¥36,528.7 ¥32,030.7	Min.: 1 Mult.: 1	Semiconductor Fuses	200 A		Fast-Acting Fuses		1.965 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 250A PSR031US0250Z Littelfuse 1: ¥50,894.7 Non-Stocked Lead-Time 15 Weeks	Mfr. Part # PSR031US0250Z Mouser Part # 576-PSR031US0250Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 250A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 15 Weeks	¥50,894.7 ¥41,284.2 ¥36,035.4 ¥32,030.7	Min.: 1 Mult.: 1	Semiconductor Fuses	250 A		Fast-Acting Fuses		3.789 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 315A PSR031US0315Z Littelfuse 1: ¥45,692.4 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031US0315Z Mouser Part # 576-PSR031US0315Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 315A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥45,692.4 ¥38,711.3 ¥36,052 ¥32,030.7	Min.: 1 Mult.: 1	Semiconductor Fuses	315 A		Fast-Acting Fuses		6.862 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 350A PSR031US0350Z Littelfuse 1: ¥50,894.7 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031US0350Z Mouser Part # 576-PSR031US0350Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 350A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥50,894.7 ¥41,284.2 ¥36,369.3 ¥32,030.7	Min.: 1 Mult.: 1	Semiconductor Fuses	350 A		Fast-Acting Fuses		9.523 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 450A PSR031US0450Z Littelfuse 1: ¥48,635.7 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031US0450Z Mouser Part # 576-PSR031US0450Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 450A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥48,635.7 ¥41,539.9 ¥38,683 ¥38,578.4	Min.: 1 Mult.: 1	Semiconductor Fuses	450 A		Fast-Acting Fuses		22.457 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 630A PSR031US0630Z Littelfuse 3: ¥64,212.6 Non-Stocked Lead-Time 15 Weeks	Mfr. Part # PSR031US0630Z Mouser Part # 576-PSR031US0630Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 630A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 15 Weeks	¥64,212.6 ¥53,198.5 ¥49,029.4	Min.: 3 Mult.: 3	Semiconductor Fuses	630 A		Fast-Acting Fuses		73.513 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 700A PSR031US0700Z Littelfuse 3: ¥53,992.5 Non-Stocked Lead-Time 15 Weeks	Mfr. Part # PSR031US0700Z Mouser Part # 576-PSR031US0700Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHRT BL 700A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 15 Weeks	¥53,992.5 ¥49,853.3 ¥47,921.5 Quote Quote	Min.: 3 Mult.: 3	Semiconductor Fuses	700 A		Fast-Acting Fuses		98.187 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHORT BL 900A PSR031US0900Z Littelfuse 3: ¥71,102.4 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # PSR031US0900Z Mouser Part # 576-PSR031US0900Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 31 US SHORT BL 900A	Datasheet	Non-Stocked Lead-Time 18 Weeks	¥71,102.4 ¥58,384.2 ¥53,130.4	Min.: 3 Mult.: 3	Semiconductor Fuses	900 A		Fast-Acting Fuses		155.163 kA2s	Knife Blade	Class aR Fuses	31	Visual Indicator	Bulk	PSR