Industrial & Electrical Fuses – Mouser Puerto Rico

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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 (USD) 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	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: $353.63 A tariff of 10% may be applied if shipping to the United States. 18In Stock	Mfr. Part # PSR070UL0200Z Mouser Part # 576-PSR070UL0200Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 200A Learn More about Littelfuse psr fuses	Datasheet	18In Stock	$353.63 $312.03 $302.41 A tariff of 10% may be applied if shipping to the United States.	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: $555.94 A tariff of 10% may be applied if shipping to the United States. 5In Stock	Mfr. Part # PSR072DL0500X Mouser Part # 576-PSR072DL0500X	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 72 DIN 110MM 500A Learn More about Littelfuse psr fuses	Datasheet	5In Stock	$555.94 $438.12 $399.74 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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 POWR-SPEED SQB Size 32 US LONG BL 400A PSR032UL0400X Littelfuse 1: $372.27 A tariff of 10% may be applied if shipping to the United States. 2In Stock	Mfr. Part # PSR032UL0400X Mouser Part # 576-PSR032UL0400X	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB Size 32 US LONG BL 400A Learn More about Littelfuse psr fuses	Datasheet	2In Stock	$372.27 $291.41 $277.55 Quote Quote A tariff of 10% may be applied if shipping to the United States.	Min.: 1 Mult.: 1	Semiconductor Fuses	400 A		Fast-Acting Fuses			Knife Blade	Class aR Fuses	32	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred PSR070FL0200Z Littelfuse 1: $408.69 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR070FL0200Z Mouser Part # 576-PSR070FL0200Z	Littelfuse	Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$408.69 $329.63 $309.05 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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 125A 700VAC SIZE 30 POWER-SPEED FLUSH M PSR030FL0125Z Littelfuse 1: $171.57 A tariff of 10% may be applied if shipping to the United States. 9In Stock	Mfr. Part # PSR030FL0125Z Mouser Part # 576-PSR030FL0125Z	Littelfuse	Industrial & Electrical Fuses 125A 700VAC SIZE 30 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	9In Stock	$171.57 $171.56 A tariff of 10% may be applied if shipping to the United States.	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 900V FAST BLOW 800A PSR073UL0800X Littelfuse 1: $604.53 A tariff of 10% may be applied if shipping to the United States. 3In Stock 3Expected 3/11/2027	Mfr. Part # PSR073UL0800X Mouser Part # 576-PSR073UL0800X	Littelfuse	Industrial & Electrical Fuses 900V FAST BLOW 800A	Datasheet	3In Stock 3Expected 3/11/2027	$604.53 $500.68 $461.30 A tariff of 10% may be applied if shipping to the United States.	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: $387.22 A tariff of 10% may be applied if shipping to the United States. 19In Stock	Mfr. Part # PSR070DL0050Z Mouser Part # 576-PSR070DL0050Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 DIN 110MM 50A Learn More about Littelfuse psr fuses	Datasheet	19In Stock	$387.22 $320.31 $295.18 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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: $487.60 A tariff of 10% may be applied if shipping to the United States. 10In Stock	Mfr. Part # PSR070UL0350Z Mouser Part # 576-PSR070UL0350Z	Littelfuse	Industrial & Electrical Fuses 900V FAST BLOW 350A	Datasheet	10In Stock	$487.60 $395.35 $364.26 A tariff of 10% may be applied if shipping to the United States.	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: $397.56 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR070UL0100Z Mouser Part # 576-PSR070UL0100Z	Littelfuse	Industrial & Electrical Fuses 1000V SIZE 70 LONG BL 100A Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$397.56 $333.53 $307.35 A tariff of 10% may be applied if shipping to the United States.	Min.: 1 Mult.: 1	Semiconductor Fuses	100 A		Fast-Acting Fuses			Knife Blade	Class aR Fuses	70	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses 200A 700VAC SIZE 30 POWER-SPEED FLUSH M PSR030FL0200Z Littelfuse 1: $251.46 A tariff of 10% may be applied if shipping to the United States. 3In Stock	Mfr. Part # PSR030FL0200Z Mouser Part # 576-PSR030FL0200Z	Littelfuse	Industrial & Electrical Fuses 200A 700VAC SIZE 30 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	3In Stock	$251.46 $207.86 $184.94 $162.75 A tariff of 10% may be applied if shipping to the United States.	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: $380.03 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR070FL0080Z Mouser Part # 576-PSR070FL0080Z	Littelfuse	Industrial & Electrical Fuses 80A 1000V SIZE 70 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$380.03 $316.17 $297.71 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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: $419.31 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR070FL0250Z Mouser Part # 576-PSR070FL0250Z	Littelfuse	Industrial & Electrical Fuses 250A 1000V SIZE 70 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$419.31 $350.80 $330.30 A tariff of 10% may be applied if shipping to the United States.	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: $408.09 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR070FS0200Z Mouser Part # 576-PSR070FS0200Z	Littelfuse	Industrial & Electrical Fuses 200A 1000V SIZE 70 Flush End In Thread Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$408.09 $320.42 $306.59 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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: $387.21 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR070UL0050Z Mouser Part # 576-PSR070UL0050Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 50A Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$387.21 $314.65 $289.94 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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: $408.08 A tariff of 10% may be applied if shipping to the United States. 3In Stock	Mfr. Part # PSR071FL0400Z Mouser Part # 576-PSR071FL0400Z	Littelfuse	Industrial & Electrical Fuses 400A 1250VAC SIZE 71 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	3In Stock	$408.08 $330.94 $311.59 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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: $534.04 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR073FL0700Z Mouser Part # 576-PSR073FL0700Z	Littelfuse	Industrial & Electrical Fuses 700A 1250V SIZE 73 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$534.04 $437.75 $408.67 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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: $367.76 A tariff of 10% may be applied if shipping to the United States. 1In Stock	Mfr. Part # PSR031FL0700Z Mouser Part # 576-PSR031FL0700Z	Littelfuse	Industrial & Electrical Fuses 700A 700V SIZE 31 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1In Stock	$367.76 $287.98 $274.02 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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 63A 1000V SIZE 70 Flush End In Thread PSR070FS0063Z Littelfuse 1: $337.04 A tariff of 10% may be applied if shipping to the United States. 6Expected 4/5/2027	Mfr. Part # PSR070FS0063Z Mouser Part # 576-PSR070FS0063Z	Littelfuse	Industrial & Electrical Fuses 63A 1000V SIZE 70 Flush End In Thread Learn More about Littelfuse psr fuses	Datasheet	6Expected 4/5/2027	$337.04 $323.08 A tariff of 10% may be applied if shipping to the United States.	Min.: 1 Mult.: 1	Semiconductor Fuses	63 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 900V FAST BLOW 700A PSR073UL0700X Littelfuse 1: $532.38 A tariff of 10% may be applied if shipping to the United States. 11On Order	Mfr. Part # PSR073UL0700X Mouser Part # 576-PSR073UL0700X	Littelfuse	Industrial & Electrical Fuses 900V FAST BLOW 700A Learn More about Littelfuse psr fuses	Datasheet	11On Order On Order Ship Dates Mfr. #: PSR073UL0700X Stock: 0 On Order: 4 Expected 12/29/2026 7 Expected 12/31/2026 Factory Lead-Time: 15 Weeks	$532.38 $505.86 $503.06 A tariff of 10% may be applied if shipping to the United States.	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: $216.53 A tariff of 10% may be applied if shipping to the United States. 3Expected 2/24/2027	Mfr. Part # PSR030FL0350Z Mouser Part # 576-PSR030FL0350Z	Littelfuse	Industrial & Electrical Fuses 350A 700VAC SIZE 30 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	3Expected 2/24/2027	$216.53 $203.71 $192.88 $187.68 A tariff of 10% may be applied if shipping to the United States.	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: $308.89 A tariff of 10% may be applied if shipping to the United States. 1Expected 12/14/2026	Mfr. Part # PSR031FL0350Z Mouser Part # 576-PSR031FL0350Z	Littelfuse	Industrial & Electrical Fuses 350A 700V SIZE 31 Flush End Mtrc Thred Learn More about Littelfuse psr fuses	Datasheet	1Expected 12/14/2026	$308.89 $250.59 $230.94 $212.59 A tariff of 10% may be applied if shipping to the United States.	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 70 US LONG BL 250A PSR070UL0250Z Littelfuse 1: $428.04 A tariff of 10% may be applied if shipping to the United States. 3Expected 12/21/2026	Mfr. Part # PSR070UL0250Z Mouser Part # 576-PSR070UL0250Z	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 70 US LONG BL 250A Learn More about Littelfuse psr fuses	Datasheet	3Expected 12/21/2026	$428.04 $347.15 $309.21 Quote Quote A tariff of 10% may be applied if shipping to the United States.	Min.: 1 Mult.: 1	Semiconductor Fuses	250 A		Fast-Acting Fuses			Knife Blade	Class aR Fuses	70	Visual Indicator	Bulk	PSR
Industrial & Electrical Fuses POWR-SPEED SQB SIZE 33 DIN 80MM 500A PSR033DS0500X Littelfuse 1: $429.67 A tariff of 10% may be applied if shipping to the United States. Non-Stocked Lead-Time 11 Weeks	Mfr. Part # PSR033DS0500X Mouser Part # 576-PSR033DS0500X	Littelfuse	Industrial & Electrical Fuses POWR-SPEED SQB SIZE 33 DIN 80MM 500A Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 11 Weeks	$429.67 $388.23 $379.24 Quote Quote A tariff of 10% may be applied if shipping to the United States.	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
Industrial & Electrical Fuses 315A 1250VAC SIZE 71 POWER-SPEED FLUSH M PSR071FL0315Z Littelfuse 1: $419.31 A tariff of 10% may be applied if shipping to the United States. Non-Stocked Lead-Time 11 Weeks	Mfr. Part # PSR071FL0315Z Mouser Part # 576-PSR071FL0315Z	Littelfuse	Industrial & Electrical Fuses 315A 1250VAC SIZE 71 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 11 Weeks	$419.31 $350.80 $330.30 A tariff of 10% may be applied if shipping to the United States.	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
Industrial & Electrical Fuses 630A 1250VAC SIZE 72 POWER-SPEED FLUSH M PSR072FL0630Z Littelfuse 1: $440.34 A tariff of 10% may be applied if shipping to the United States. Non-Stocked Lead-Time 11 Weeks	Mfr. Part # PSR072FL0630Z Mouser Part # 576-PSR072FL0630Z	Littelfuse	Industrial & Electrical Fuses 630A 1250VAC SIZE 72 POWER-SPEED FLUSH M Learn More about Littelfuse psr fuses	Datasheet	Non-Stocked Lead-Time 11 Weeks	$440.34 $413.74 $402.01 Quote Quote A tariff of 10% may be applied if shipping to the United States.	Min.: 1 Mult.: 1	Semiconductor Fuses	630 A	1.3 kVAC	Fast-Acting Fuses	1 kVDC		Quick Connect	Class aR Fuses	72	Visual Side Indicator	Bulk	PSR

PSR High-Speed Square Body Fuses

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