Cartridge Fuses

Cartridge fuses are a low cost electrical safety device that is used to protect electrical circuits and appliances. They are cylindrical in shape and have a contact point at each end. Cartridge fuses are typically constructed from ceramic, glass or porcelain.

How do cartridge fuses work?

Cartridge fuses contain a piece of wire that melts when too much current flows through the circuit. When the wire melts, it breaks the circuit which prevents any damage. This is often referred to as burning out or blowing out. Put simply, when a fuse blows, the circuit is broken. Once a fuse has blown, it will need replacing in order to make the circuit complete again, and allow the flow of current.

Different types of cartridge fuse

Most cartridge fuses are general purpose and feature no time delay, however, some heavy duty options will have a time delay features that enables motors to start up.

Why use cartridge fuses?

Cartridge fuses are a relatively cheap way of protecting electrical equipment from short circuits and overcurrent. They are incredibly safe as they do not produce flames, arcs or gas when they burn out and break the circuit. Their speed of operation is also incredibly quick, as they react almost instantly.

What cartridge fuse should you choose?

Cartridge fuses are available in a range of standard current rating variants. When choosing the correct fuse for your application, you should choose a fuse with a nominally higher current rating than the device that it is being used in. This means that if there is a slight, harmless power increase, the fuse will not blow.


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Description Price Current Rating Fuse Size Fuse Speed Voltage Rating Overall Length Diameter Body Material Application Category UL Class Fuse Standard Series
RS Stock No. 314-4816
Mfr. Part No.50-179-06/16A
BrandSIBA
$17.824
Each (In a Pack of 5)
units
16 A 10 x 38mm - 700 V ac - - Ceramic GR - - URZ
RS Stock No. 736-1416
Mfr. Part No.70-172-40/0.5A
BrandSIBA
$8.74
Each
units
500 mA 6.3 x 32mm FF 1 kV ac, 1 kV dc - - Ceramic - - - GZ
RS Stock No. 314-4822
Mfr. Part No.50-179-06/20A
BrandSIBA
$18.046
Each (In a Pack of 5)
units
20 A 10 x 38mm - 700 V ac - - Ceramic GR - - URZ
RS Stock No. 736-1422
Mfr. Part No.50-199-06/10A
BrandSIBA
$22.78
Each
units
10 A 10 x 38mm - 1 kV ac - - Ceramic GR UL 248-13 - URZ
RS Stock No. 768-6112
Mfr. Part No.5022526.20
BrandSIBA
$17.54
Each
units
20 A 10 x 38mm - 600 V dc - - Ceramic GPV, GR - - URZ
RS Stock No. 267-3464
Mfr. Part No.70-010-05/0.5A
BrandSIBA
$4.12
Each (In a Pack of 5)
units
500 mA 5 x 25mm M 250 V ac - - Ceramic - - - GZ
RS Stock No. 418-9501
Mfr. Part No.70-059-61/0.5A
BrandSIBA
$0.82
Each (In a Pack of 10)
units
500 mA 6.3 x 32mm T 250 V ac - - Glass - - - GZ
RS Stock No. 768-6109
Mfr. Part No.5022526.10
BrandSIBA
$19.18
Each
units
10 A 10 x 38mm - 600 V dc - - Ceramic GPV, GR - - URZ
RS Stock No. 736-1412
Mfr. Part No.70-172-40/0.315A
BrandSIBA
$8.17
Each
units
315 mA 6.3 x 32mm FF 1 kV ac, 1 kV dc - - Ceramic - - - GZ
RS Stock No. 736-1425
Mfr. Part No.70-172-40/1.6A
BrandSIBA
$8.95
Each
units
1.6 A 6.3 x 32mm FF 1 kV ac, 1 kV dc - - Ceramic - - - GZ
RS Stock No. 418-9602
Mfr. Part No.70-059-61 8A
BrandSIBA
$0.532
Each (In a Pack of 10)
units
8 A 6.3 x 32mm T 250 V ac - - Glass - - - GZ
RS Stock No. 361-8159
Mfr. Part No.171530.0,5
BrandSIBA
$2.749
Each (In a Pack of 10)
units
500 mA 5 x 30mm F 500 V ac - - Glass - - - 171530
RS Stock No. 267-3565
Mfr. Part No.70-010-05/1A
BrandSIBA
$8.718
Each (In a Pack of 5)
units
1 A 5 x 25mm M 250 V ac - - Ceramic - - - GZ
RS Stock No. 267-3515
Mfr. Part No.70-010-05/4A
BrandSIBA
$7.156
Each (In a Pack of 5)
units
4 A 5 x 25mm M 250 V ac - - Ceramic - - - GZ
RS Stock No. 418-9494
Mfr. Part No.70-059-61/0.25A
BrandSIBA
$0.816
Each (In a Pack of 10)
units
250 mA 6.3 x 32mm T 250 V ac - - Glass - - - GZ
RS Stock No. 267-3420
Mfr. Part No.70-010-04/6.3A
BrandSIBA
$4.812
Each (In a Pack of 5)
units
6.3 A 5 x 25mm F 250 V ac - - Ceramic - - - GZ
RS Stock No. 768-6115
Mfr. Part No.5021526.10
BrandSIBA
$22.70
Each
units
10 A 10 x 38mm - 1 kV dc - - Ceramic GPV - - URZ
RS Stock No. 783-3214
Mfr. Part No.70-007-33/0.5A
BrandSIBA
$0.31
Each (In a Pack of 10)
units
500 mA 5 x 20mm F 250 V ac - - Ceramic - - - GZ
RS Stock No. 783-3236
Mfr. Part No.70-007-33/2A
BrandSIBA
$0.31
Each (In a Pack of 10)
units
2 A 5 x 20mm F 250 V ac - - Ceramic - - - GZ
RS Stock No. 418-9646
Mfr. Part No.70-059-61 20A
BrandSIBA
$0.532
Each (In a Pack of 10)
units
20 A 6.3 x 32mm T 250 V ac - - Glass - - - GZ