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 Diameter Voltage Rating Overall Length Body Material Application Category UL Class Fuse Standard Priced to Clear Series
RS Stock No. 878-3794
Mfr. Part No.0217001.HXP
BrandLittelfuse
£0.233
Each (In a Pack of 100)
Units
1A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-4375A
Mfr. Part No.0217001.MXP
BrandLittelfuse
£0.132
Each (In a Pack of 100)
Units
1A 5 x 20mm F 5mm 250V ac - Glass - - - - 217
RS Stock No. 876-8290
Mfr. Part No.0217001.VXP
BrandLittelfuse
£1.572
Each (In a Pack of 5)
Units
1A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-4375
Mfr. Part No.0217001.MXP
BrandLittelfuse
£0.213
Each (In a Pack of 10)
Units
1A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-4410
Mfr. Part No.0217002.MXP
BrandLittelfuse
£0.214
Each (In a Pack of 10)
Units
2A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-4410A
Mfr. Part No.0217002.MXP
BrandLittelfuse
£0.132
Each (In a Pack of 100)
Units
2A 5 x 20mm F 5mm 250V ac - Glass - - - - 217
RS Stock No. 878-3334
Mfr. Part No.0217002.HXP
BrandLittelfuse
£0.233
Each (In a Pack of 100)
Units
2A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-4347
Mfr. Part No.0217.500MXP
BrandLittelfuse
£0.213
Each (In a Pack of 10)
Units
500mA 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-4347A
Mfr. Part No.0217.500MXP
BrandLittelfuse
£0.132
Each (In a Pack of 100)
Units
500mA 5 x 20mm F 5mm 250V ac - Glass - - - - 217
RS Stock No. 878-3352
Mfr. Part No.0217.500HXP
BrandLittelfuse
£0.233
Each (In a Pack of 100)
Units
500mA 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-2975A
Mfr. Part No.02133.15MXP
BrandLittelfuse
£0.175
Each (In a Pack of 100)
Units
3.15A 5 x 20mm T 5mm 250V ac - Glass - - - - 213
RS Stock No. 541-2975
Mfr. Part No.02133.15MXP
BrandLittelfuse
£0.424
Each (In a Pack of 10)
Units
3.15A 5 x 20mm T - 250V ac - Glass - - - - 213
RS Stock No. 541-2953
Mfr. Part No.0213002.MXP
BrandLittelfuse
£0.424
Each (In a Pack of 10)
Units
2A 5 x 20mm T - 250V ac - Glass - - - - 213
RS Stock No. 541-2953A
Mfr. Part No.0213002.MXP
BrandLittelfuse
£0.172
Each (In a Pack of 100)
Units
2A 5 x 20mm T 5mm 250V ac - Glass - - - - 213
RS Stock No. 541-2931
Mfr. Part No.0213001.MXP
BrandLittelfuse
£0.424
Each (In a Pack of 10)
Units
1A 5 x 20mm T - 250V ac - Glass - - - - 213
RS Stock No. 541-2931A
Mfr. Part No.0213001.MXP
BrandLittelfuse
£0.171
Each (In a Pack of 100)
Units
1A 5 x 20mm T 5mm 250V ac - Glass - - - - 213
RS Stock No. 878-1381
Mfr. Part No.02153.15HXP
BrandLittelfuse
£0.915
Each (In a Pack of 50)
Units
3.15A 5 x 20mm T - 250V ac - Ceramic - - - - 215
RS Stock No. 878-1230
Mfr. Part No.02153.15VXP
BrandLittelfuse
£4.378
Each (In a Pack of 5)
Units
3.15A 5 x 20mm T - 250V ac - Ceramic - - - - 215
RS Stock No. 541-4690
Mfr. Part No.02153.15MXP
BrandLittelfuse
£0.348
Each (In a Pack of 10)
Units
3.15A 5 x 20mm T - 250V ac - Ceramic - - - - 215
RS Stock No. 541-2981A
Mfr. Part No.0213005.MXP
BrandLittelfuse
£0.172
Each (In a Pack of 100)
Units
5A 5 x 20mm T 5mm 250V ac - Glass - - - - 213