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 Diameter Fuse Size Fuse Speed Overall Dimensions Voltage Rating Overall Length Body Material High Rupture Capacity Application Category Breaking Capacity at Maximum Voltage Rating UL Class Includes Indicator Size Designation
RS stock no. 878-3794
Mfr. Part No.0217001.HXP
BrandLittelfuse
R 4.418
Each (In a Pack of 100)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 876-8290
Mfr. Part No.0217001.VXP
BrandLittelfuse
R 29.802
Each (In a Pack of 5)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 541-4375
Mfr. Part No.0217001.MXP
BrandLittelfuse
R 4.591
Each (In a Pack of 10)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 337-4916
Mfr. Part No.0KLK010.T
BrandLittelfuse
R 254.51
Each (In a Pack of 5)
units
10 A - 10 x 38mm F - 500 V dc, 600 V ac - Melamine - - - - - -
RS stock no. 541-4410
Mfr. Part No.0217002.MXP
BrandLittelfuse
R 4.118
Each (In a Pack of 10)
units
2 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 878-3334
Mfr. Part No.0217002.HXP
BrandLittelfuse
R 4.418
Each (In a Pack of 100)
units
2 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 878-3788
Mfr. Part No.0218015.HXP
BrandLittelfuse
R 18.951
Each (In a Pack of 50)
units
15 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 541-4347
Mfr. Part No.0217.500MXP
BrandLittelfuse
R 4.087
Each (In a Pack of 10)
units
500 mA - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 541-4599
Mfr. Part No.0218015.MXP
BrandLittelfuse
R 13.24
Each (In a Pack of 10)
units
15 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 878-3352
Mfr. Part No.0217.500HXP
BrandLittelfuse
R 4.418
Each (In a Pack of 100)
units
500 mA - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 878-3762
Mfr. Part No.0218001.HXP
BrandLittelfuse
R 9.692
Each (In a Pack of 50)
units
1 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 738-2788
Mfr. Part No.0218001.MXP
BrandLittelfuse
R 8.553
Each (In a Pack of 10)
units
1 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 878-3817
Mfr. Part No.0217015.HXP
BrandLittelfuse
R 5.907
Each (In a Pack of 100)
units
15 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 725-8054
Mfr. Part No.0217015.MXP
BrandLittelfuse
R 2.098
Each (In a Bag of 10)
units
15 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 769-0057
Mfr. Part No.0314015.HXP
BrandLittelfuse
R 6.729
Each (In a Pack of 10)
units
15 A - 6.3 x 32mm F - 250 V ac - Ceramic - - - - - -
RS stock no. 738-3185
Mfr. Part No.0KLK.125T
BrandLittelfuse
R 671.14
Each
units
125 mA - 10 x 38mm F - 500 V dc, 600 V ac - Melamine - - - - - -
RS stock no. 738-2797
Mfr. Part No.0218002.MXP
BrandLittelfuse
R 6.165
Each (In a Pack of 10)
units
2 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 738-2832
Mfr. Part No.0215012.TXP
BrandLittelfuse
R 13.277
Each (In a Pack of 10)
units
12 A - 5 x 20mm T - 250 V ac - Ceramic - - - - - -
RS stock no. 541-4369
Mfr. Part No.0217.800MXP
BrandLittelfuse
R 3.897
Each (In a Pack of 10)
units
800 mA - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 878-3790
Mfr. Part No.0217.800HXP
BrandLittelfuse
R 4.418
Each (In a Pack of 100)
units
800 mA - 5 x 20mm F - 250 V ac - Glass - - - - - -