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. 563-380
BrandRS PRO
£0.11
Each (In a Pack of 10)
Units
1A 5 x 20mm F - 250V ac - Glass - - - - -
RS Stock No. 563-699A
BrandRS PRO
£0.105
Each (In a Pack of 100)
Units
3.15A 5 x 20mm T 5mm 250V ac 20mm Ceramic - - - - -
RS Stock No. 563-699
BrandRS PRO
£0.216
Each (In a Pack of 10)
Units
3.15A 5 x 20mm T - 250V ac - Ceramic - - - - -
RS Stock No. 563-722
BrandRS PRO
£0.115
Each (In a Pack of 10)
Units
2A 5 x 20mm T - 250V ac - Glass - - - - -
RS Stock No. 563-722A
BrandRS PRO
£0.109
Each (In a Pack of 100)
Units
2A 5 x 20mm T 5mm 250V ac 20mm Glass - - - - -
RS Stock No. 563-609A
BrandRS PRO
£0.105
Each (In a Pack of 100)
Units
2A 5 x 20mm T 5mm 250V ac 20mm Ceramic - - - - -
RS Stock No. 563-609
BrandRS PRO
£0.125
Each (In a Pack of 10)
Units
2A 5 x 20mm T - 250V ac - Ceramic - - - - -
RS Stock No. 563-431
BrandRS PRO
£0.11
Each (In a Pack of 10)
Units
2A 5 x 20mm F - 250V ac - Glass - - - - -
RS Stock No. 563-532A
BrandRS PRO
£0.099
Each (In a Pack of 100)
Units
5A 5 x 20mm T 5mm 250V ac 20mm Glass - - - - -
RS Stock No. 563-532
BrandRS PRO
£0.11
Each (In a Pack of 10)
Units
5A 5 x 20mm T - 250V ac - Glass - - - - -
RS Stock No. 878-3801
BrandRS PRO
£0.179
Each (In a Pack of 100)
Units
5A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 541-3108A
BrandRS PRO
£0.132
Each (In a Pack of 100)
Units
5A 5 x 20mm F 5mm 250V ac - Glass - - - - 217
RS Stock No. 541-3108
BrandRS PRO
£0.214
Each (In a Pack of 10)
Units
5A 5 x 20mm F - 250V ac - Glass - - - - 217
RS Stock No. 563-605A
BrandRS PRO
£0.105
Each (In a Pack of 100)
Units
1A 5 x 20mm T 5mm 250V ac 20mm Ceramic - - - - -
RS Stock No. 563-605
BrandRS PRO
£0.125
Each (In a Pack of 10)
Units
1A 5 x 20mm T - 250V ac - Ceramic - - - - -
RS Stock No. 414-061
BrandRS PRO
£0.662
Each (In a Pack of 10)
Units
10A 6.3 x 32mm T - 500V ac - Ceramic - - - - -
RS Stock No. 414-061A
BrandRS PRO
£0.594
Each (In a Pack of 100)
Units
10A 6.3 x 32mm T 6.35mm 500V ac 32mm Ceramic - - - - -
RS Stock No. 563-693
BrandRS PRO
£0.216
Each (In a Pack of 10)
Units
5A 5 x 20mm T - 250V ac - Ceramic - - - - -
RS Stock No. 563-693A
BrandRS PRO
£0.105
Each (In a Pack of 100)
Units
5A 5 x 20mm T 5mm 250V ac 20mm Ceramic - - - - -
RS Stock No. 563-592
BrandRS PRO
£0.227
Each (In a Pack of 10)
Units
10A 5 x 20mm T - 250V ac - Ceramic - - - - UDA
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