Square Body Fuses

Square Body Fuses are extremely reliable very quick-acting fuses used for the protection of semiconductor devices. The high-speed fuses are specifically designed to protect sensitive devices such as SCRs, thyristors, and diodes. They work by minimizing peak current let-through and arc voltages.

RS offer a range of high-quality fuses for all your circuit protection applications. We source our products from industry-leading brands including Mersen and Bussmann.

How do you mount a square body fuse?

These fuses feature a threaded hole through the centre of their casing. This allows the fuse to be conveniently screwed into place without the need for special fuse holders.

What size High-Speed Square Body Fuse types are available?

Our fuses are available in a range of sizes ranging from 30, 31, 32, and 33.

Fuse ratings

Our fuses are available in current ratings ranging from 80 amps to 900 amps.

Fuse application categories

The application category of a fuse is denoted by a two-digit code. Fuses are marked with letters that denote their characteristic or application. The first letter will be lower case, this indicates the breaking range. The second letter will be in the upper case and indicates the characteristics.

aR Class Fuses - Provide partial range breaking capacity, for short circuit protection only.

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Mersen 100A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-1969 Tillv. art.nr T300052 Varje 1 555,59 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	100A	700V	FF	46.5mm	50.6mm	40mm	aR
Mersen 80A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-1953 Tillv. art.nr S300051 Varje 1 479,96 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	80A	700V	FF	46.5mm	50.6mm	40mm	aR
Siemens 250A Square Body Flush End Contacts Fuse, aR, 800V RS-artikelnummer 210-6978 Tillv. art.nr 3NE4327-6B Var (i ett paket med 3) 1 568,00 kr Antal	Siemens	-	DIN EN 60269-1	-	250A	800V	-	-	-	-	aR
Mersen 125A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-1975 Tillv. art.nr V300053 Varje 1 624,13 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	125A	700V	FF	46.5mm	50.6mm	40mm	aR
Mersen 450A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2091 Tillv. art.nr S300005 Varje 2 800,23 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	450A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 350A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2079 Tillv. art.nr M300046 Varje 2 480,72 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	350A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 400A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2085 Tillv. art.nr R300004 Varje 2 644,85 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	400A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 250A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2057 Tillv. art.nr P300002 Varje 2 161,22 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	250A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 500A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2108 Tillv. art.nr T300006 Varje 2 964,36 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	500A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 250A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2007 Tillv. art.nr Y300056 Varje 2 030,25 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	250A	700V	FF	46.5mm	50.6mm	40mm	aR
Mersen 400A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2041 Tillv. art.nr B300059 Varje 2 511,89 kr Antal	Mersen	-	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	400A	700V	FF	46.5mm	50.6mm	40mm	aR
Mersen 630A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2120 Tillv. art.nr W300008 Varje 3 372,58 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	630A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 315A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2063 Tillv. art.nr Q300003 Varje 2 365,28 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	315A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 160A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-1981 Tillv. art.nr W300054 Varje 1 737,47 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	160A	700V	FF	46.5mm	50.6mm	40mm	aR
Mersen 400A size 32 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2136 Tillv. art.nr H300065 Varje 2 769,06 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	32	400A	700V	FF	65.5mm	50.6mm	60mm	aR
Mersen 550A size 31 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2114 Tillv. art.nr V300007 Varje 3 121,95 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	31	550A	700V	FF	56.5mm	50.6mm	51mm	aR
Mersen 500A size 32 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2142 Tillv. art.nr K300067 Varje 3 090,78 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	32	500A	700V	FF	65.5mm	50.6mm	60mm	aR
Mersen 1.25kA size 33 FF Square Body Fuse, aR, 700V RS-artikelnummer 448-3257 Tillv. art.nr D300084 Varje 5 702,37 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	33	1.25kA	700V	FF	79.5mm	50.6mm	74.5mm	aR
Mersen 315A size 30 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2029 Tillv. art.nr Z300057 Varje 2 232,20 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	30	315A	700V	FF	46.5mm	50.6mm	40mm	aR
Mersen 800A size 33 FF Square Body Fuse, aR, 700V RS-artikelnummer 304-2215 Tillv. art.nr Z300080 Varje 4 215,75 kr Antal	Mersen	High Rupture Capacity	DIN 43653, NF EN 60269-1, NF EN 60269-4	33	800A	700V	FF	79.5mm	50.6mm	74.5mm	aR