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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.

64 Products showing for Square Body Fuses

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Temporarily out of stock Mersen 630A size 32 FF Square Body Fuse, 700V RS Stock No. 304-2158 Mfr. Part No. M300069 / PC32UD69V630TF Subtotal (1 unit) £185.82(exc. VAT) £185.82/unit Quantity	Mersen	-	Square Body Fuse	No	32	630A	700V	-	FF	Yes	-	100mm	-	-	-	65.5mm	60mm	50.6mm
Temporarily out of stock Mersen 80A size 30 FF Square Body Fuse, 700V RS Stock No. 304-1953 Mfr. Part No. S300051 / PC30UD69V80TF Subtotal (1 unit) £77.47(exc. VAT) £77.47/unit Quantity	Mersen	-	Square Body Fuse	No	30	80A	700V	-	FF	Yes	-	82mm	-	-	-	46.5mm	40mm	50.6mm
In Stock Mersen 250A size 30 FF Square Body Fuse, 700V RS Stock No. 304-2007 Mfr. Part No. Y300056 / PC30UD69V250TF Subtotal (1 unit) £106.28(exc. VAT) £106.28/unit Quantity	Mersen	-	Square Body Fuse	No	30	250A	700V	-	FF	Yes	-	82mm	-	-	-	46.5mm	40mm	50.6mm
In Stock Mersen 160A size 30 FF Square Body Fuse, 700V RS Stock No. 304-1981 Mfr. Part No. W300054 / PC30UD69V160TF Subtotal (1 unit) £90.95(exc. VAT) £90.95/unit Quantity	Mersen	-	Square Body Fuse	No	30	160A	700V	-	FF	Yes	-	82mm	-	-	-	46.5mm	40mm	50.6mm
In Stock Mersen 630A size 33 FF Square Body Fuse, 700V RS Stock No. 304-2192 Mfr. Part No. X300078 / PC33UD69V630TF Subtotal (1 unit) £191.63(exc. VAT) £191.63/unit Quantity	Mersen	-	Square Body Fuse	No	33	630A	700V	-	FF	Yes	-	114mm	-	-	-	79.5mm	74.5mm	50.6mm
Temporarily out of stock Mersen 315A size 31 FF Square Body Fuse, 700V RS Stock No. 304-2063 Mfr. Part No. Q300003 / PC31UD69V315TF Subtotal (1 unit) £123.81(exc. VAT) £123.81/unit Quantity	Mersen	-	Square Body Fuse	No	31	315A	700V	-	FF	Yes	-	91mm	-	-	-	56.5mm	51mm	50.6mm
Temporarily out of stock Siemens 50A Square Body Fuse, gR, 250V dc RS Stock No. 665-108 Mfr. Part No. 3NE4117-5 Subtotal (1 pack of 2 units) £151.68(exc. VAT) £151.68/pack Quantity	Siemens	-	Square Body Fuse	No	-	50A	250V dc	-	-	-	-	-	-	-	gR	-	-	-
Temporarily out of stock Mersen 315A size 30 FF Square Body Fuse, 700V RS Stock No. 304-2029 Mfr. Part No. Z300057 / PC30UD69V315TF Subtotal (1 unit) £116.83(exc. VAT) £116.83/unit Quantity	Mersen	-	Square Body Fuse	No	30	315A	700V	-	FF	Yes	-	82mm	-	-	-	46.5mm	40mm	50.6mm
Temporarily out of stock Siemens 1.25kA size 125 mm Tag Fuse, 600V RS Stock No. 608-822 Mfr. Part No. 3NE9450-7 Subtotal (1 pack of 3 units) £962.99(exc. VAT) £962.99/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1	125 mm	1.25kA	600V	-	-	Yes	-	-	-	-	-	-	-	-
Temporarily out of stock Siemens 1.6kA size NH3 Tag Fuse, 500V RS Stock No. 608-794 Mfr. Part No. 3NC3245-6U Subtotal (1 pack of 3 units) £1,489.06(exc. VAT) £1,489.06/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1	NH3	1.6kA	500V	-	-	-	-	-	-	-	-	-	-	-
Temporarily out of stock Mersen 450A size 31 FF Square Body Fuse, 700V RS Stock No. 304-2091 Mfr. Part No. S300005 / PC31UD69V450TF Subtotal (1 unit) £146.57(exc. VAT) £146.57/unit Quantity	Mersen	-	Square Body Fuse	No	31	450A	700V	-	FF	Yes	-	91mm	-	-	-	56.5mm	51mm	50.6mm
Stocked by manufacturer Schneider Electric 700A size 31 x 31 mm F Square Body Fuse, Schutz, 690V ac RS Stock No. 275-6769 Mfr. Part No. DF431700 Subtotal (1 unit) £166.06(exc. VAT) £166.06/unit Quantity	Schneider Electric	-	Square Body Fuse	RoHS-Richtlinie für China, EU-RoHS-Richtlinie, REACH-Verordnung	31 x 31 mm	700A	690V ac	-	F	-	-	-	-	-	Schutz	-	-	-
Temporarily out of stock Siemens 710A size 125 mm AR Tag Fuse, 900V RS Stock No. 608-651 Mfr. Part No. 3NE6437-7 Subtotal (1 pack of 3 units) £917.94(exc. VAT) £917.94/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1	125 mm	710A	900V	-	AR	-	-	-	-	-	-	-	-	-
Temporarily out of stock Siemens 850A size 89 mm Tag Fuse, gR, 600V RS Stock No. 608-662 Mfr. Part No. 3NE9440-6 Subtotal (1 pack of 3 units) £1,176.00(exc. VAT) £1,176.00/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1	89 mm	850A	600V	-	-	Yes	-	-	-	-	gR	-	-	-
Temporarily out of stock Siemens 1.4kA size NH3 AR Tag Fuse, 500V RS Stock No. 608-736 Mfr. Part No. 3NC3244-6U Subtotal (1 pack of 3 units) £1,489.06(exc. VAT) £1,489.06/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1	NH3	1.4kA	500V	-	AR	-	-	-	-	-	-	-	-	-
In Stock Siemens 1kA size NH3 Square Body Flush End Contacts Fuse, 1kV RS Stock No. 210-6953 Mfr. Part No. 3NC3341-6U Subtotal (1 pack of 3 units) £1,383.129(exc. VAT) £461.043/unit Quantity	Siemens	-	Square Body Flush End Contacts Fuse	CE, EAC	NH3	1kA	1kV	-	-	Yes	-	-	-	-	-	-	-	-
Temporarily out of stock Siemens 900A size 99 mm Tag Fuse, 900V RS Stock No. 608-835 Mfr. Part No. 3NE6444 Subtotal (1 pack of 3 units) £1,295.08(exc. VAT) £1,295.08/pack Quantity	Siemens	-	Tag Fuse	IEC 60947-2, EN 60269-1	99 mm	900A	900V	-	-	Yes	-	-	-	-	-	-	-	-
Stocked by manufacturer Siemens 450A Square Body Flush End Contacts Fuse, 800V RS Stock No. 210-6981 Mfr. Part No. 3NE4333-6B Subtotal (1 pack of 3 units) £777.981(exc. VAT) £259.327/unit Quantity	Siemens	-	Square Body Flush End Contacts Fuse	CE, EAC	-	450A	800V	-	-	Yes	-	-	-	-	-	-	-	-
Temporarily out of stock Siemens 1.25kA size NH3 Tag Fuse, 800V RS Stock No. 608-767 Mfr. Part No. 3NC3343-6U Subtotal (1 pack of 3 units) £1,658.26(exc. VAT) £1,658.26/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1	NH3	1.25kA	800V	-	-	-	-	-	-	-	-	-	-	-
Temporarily out of stock Siemens 1.25kA size 89 mm Tag Fuse, 600V RS Stock No. 608-847 Mfr. Part No. 3NE9450 Subtotal (1 pack of 3 units) £962.99(exc. VAT) £962.99/pack Quantity	Siemens	-	Tag Fuse	EN 60269-1, IEC 60947-2	89 mm	1.25kA	600V	-	-	Yes	-	-	-	-	-	-	-	-