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. 563-431
BrandRS PRO
kr 1,525
Each (In a Pack of 10)
Units
2A - 5 x 20mm F - 250V ac - Glass - - - - - -
RS Stock No. 563-592A
BrandRS PRO
kr 1,244
Each (In a Pack of 100)
Units
10A 5mm 5 x 20mm T - 250V ac 20mm Ceramic - - - - - -
RS Stock No. 563-380
BrandRS PRO
kr 1,525
Each (In a Pack of 10)
Units
1A - 5 x 20mm F - 250V ac - Glass - - - - - -
RS Stock No. 563-592
BrandRS PRO
kr 2,702
Each (In a Pack of 10)
Units
10A - 5 x 20mm T - 250V ac - Ceramic - - - - - -
RS Stock No. 563-491
BrandRS PRO
kr 1,525
Each (In a Pack of 10)
Units
3.15A - 5 x 20mm F - 250V ac - Glass - - - - - -
RS Stock No. 563-621A
BrandRS PRO
kr 1,283
Each (In a Pack of 100)
Units
3.15A 5mm 5 x 20mm T - 250V ac 20mm Glass - - - - - -
RS Stock No. 611-0018
BrandRS PRO
kr 3,21
Each (In a Pack of 10)
Units
6.3A - 5 x 20mm T - 250V ac - Glass - - - - - -
RS Stock No. 563-548
BrandRS PRO
kr 1,565
Each (In a Pack of 10)
Units
1.25A - 5 x 20mm T - 250V ac - Glass - - - - - -
RS Stock No. 209-9298
BrandRS PRO
kr 7,338
Each (In a Pack of 10)
Units
16A - 6.3 x 32mm F - 500V ac - Ceramic - - - UL 248-13 - -
RS Stock No. 563-693A
BrandRS PRO
kr 1,244
Each (In a Pack of 100)
Units
5A 5mm 5 x 20mm T - 250V ac 20mm Ceramic - - - - - -
RS Stock No. 563-558
BrandRS PRO
kr 1,565
Each (In a Pack of 10)
Units
1A - 5 x 20mm T - 250V ac - Glass - - - - - -
RS Stock No. 563-558A
BrandRS PRO
kr 1,283
Each (In a Pack of 100)
Units
1A 5mm 5 x 20mm T - 250V ac 20mm Glass - - - - - -
RS Stock No. 563-356
BrandRS PRO
kr 1,765
Each (In a Pack of 10)
Units
800mA - 5 x 20mm T - 250V ac - Ceramic - - - - - -
RS Stock No. 668-5963
BrandRS PRO
kr 1,525
Each (In a Pack of 10)
Units
3A - 5 x 20mm F - 250V ac - Glass - - - - - -
RS Stock No. 563-621
BrandRS PRO
kr 1,565
Each (In a Pack of 10)
Units
3.15A - 5 x 20mm T - 250V ac - Glass - - - - - -
RS Stock No. 563-693
BrandRS PRO
kr 2,572
Each (In a Pack of 10)
Units
5A - 5 x 20mm T - 250V ac - Ceramic - - - - - -
RS Stock No. 563-425A
BrandRS PRO
kr 1,283
Each (In a Pack of 100)
Units
6.3A 5mm 5 x 20mm T - 250V ac 20mm Glass - - - - - -
RS Stock No. 563-425
BrandRS PRO
kr 1,565
Each (In a Pack of 10)
Units
6.3A - 5 x 20mm T - 250V ac - Glass - - - - - -
RS Stock No. 563-706
BrandRS PRO
kr 1,525
Each (In a Pack of 10)
Units
6.3A - 5 x 20mm F - 250V ac - Glass - - - - - -
RS Stock No. 563-699
BrandRS PRO
kr 2,572
Each (In a Pack of 10)
Units
3.15A - 5 x 20mm T - 250V ac - Ceramic - - - - - -
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