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. 459-7918
Mfr. Part No.DMM-B-44/100
R 195.556
Each (In a Pack of 5)
units
440 mA - 10 x 35mm F - 1 kV ac, 1 kV dc - Melamine - - - - - -
RS stock no. 459-7924
Mfr. Part No.DMM-B-11A
R 217.958
Each (In a Pack of 5)
units
11 A - 10 x 38mm F - 1 kV ac - Melamine - - - - - -
RS stock no. 563-699
BrandRS PRO
R 5.154
Each (In a Pack of 10)
units
3.15 A - 5 x 20mm T - 250 V ac - Ceramic - - - - - -
RS stock no. 541-4375
Mfr. Part No.0217001.MXP
BrandLittelfuse
R 6.287
Each (In a Pack of 10)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 876-8290
Mfr. Part No.0217001.VXP
BrandLittelfuse
R 34.746
Each (In a Pack of 5)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 878-3794
Mfr. Part No.0217001.HXP
BrandLittelfuse
R 5.149
Each (In a Pack of 100)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 337-4916
Mfr. Part No.0KLK010.T
BrandLittelfuse
R 297.272
Each (In a Pack of 5)
units
10 A - 10 x 38mm F - 500 V dc, 600 V ac - Melamine - - - - - -
RS stock no. 563-340
BrandRS PRO
R 2.899
Each (In a Pack of 10)
units
5 A - 5 x 20mm F - 250 V ac - Ceramic - - - - - -
RS stock no. 563-605
BrandRS PRO
R 2.976
Each (In a Pack of 10)
units
1 A - 5 x 20mm T - 250 V ac - Ceramic - - - - - -
RS stock no. 563-453
BrandRS PRO
R 2.699
Each (In a Pack of 10)
units
1.5 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 563-380
BrandRS PRO
R 1.365
Each (In a Pack of 10)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 703-8364
Mfr. Part No.C10G0-5
R 18.679
Each (In a Pack of 10)
units
500 mA - 10 x 38mm - - 500 V ac - Ceramic - GG - gL - - - -
RS stock no. 878-3334
Mfr. Part No.0217002.HXP
BrandLittelfuse
R 5.149
Each (In a Pack of 100)
units
2 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 458-8346
Mfr. Part No.BBS-1/2
R 112.994
Each (In a Pack of 5)
units
500 mA - 10.4 x 35mm F - 600 V ac - Fibre - - - UL 248-14 - -
RS stock no. 413-850
BrandRS PRO
R 36.112
Each (In a Pack of 10)
units
32 A - 12.7 x 29mm - - 415 V ac - - - GG - - - -
RS stock no. 541-4410
Mfr. Part No.0217002.MXP
BrandLittelfuse
R 4.905
Each (In a Pack of 10)
units
2 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 541-4347
Mfr. Part No.0217.500MXP
BrandLittelfuse
R 4.847
Each (In a Pack of 10)
units
500 mA - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 878-3788
Mfr. Part No.0218015.HXP
BrandLittelfuse
R 22.084
Each (In a Pack of 50)
units
15 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 563-532
BrandRS PRO
R 2.609
Each (In a Pack of 10)
units
5 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 851-1208
Mfr. Part No.KTK-6
R 509.42
Each
units
6 A - 10 x 38mm F - 600 V ac - Melamine - - - - - -