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. 668-6091
BrandRS PRO
£0.245
Each (In a Pack of 10)
Units
10A 6.3 x 32mm T - 250V ac - Glass - - - - -
RS Stock No. 668-6089
BrandRS PRO
£0.245
Each (In a Pack of 10)
Units
5A 6.3 x 32mm T - 250V ac - Glass - - - - -
RS Stock No. 563-334
BrandRS PRO
£0.13
Each (In a Pack of 10)
Units
10A 5 x 20mm T - 250V ac - Glass - - - - -
RS Stock No. 563-334A
BrandRS PRO
£0.123
Each (In a Pack of 100)
Units
10A 5 x 20mm T 5mm 250V ac 20mm Glass - - - - -
RS Stock No. 247-3955
BrandRS PRO
£1.565
Each (In a Pack of 10)
Units
20A 6.3 x 32mm FF - 500V ac - Ceramic - - - - -
RS Stock No. 668-6051
BrandRS PRO
£0.162
Each (In a Pack of 10)
Units
15A 6.3 x 32mm F - 250V ac - Glass - - - - -
RS Stock No. 668-5966
BrandRS PRO
£0.105
Each (In a Pack of 10)
Units
1A 5 x 20mm F - 250V ac - Glass - - - - -
RS Stock No. 413-850
BrandRS PRO
£2.604
Each (In a Pack of 10)
Units
32A 12.7 x 29mm - - 415V ac - - gG - - - MD
RS Stock No. 413-816
BrandRS PRO
£2.604
Each (In a Pack of 10)
Units
10A 12.7 x 29mm - - 415V ac - - gG - - - MD
RS Stock No. 247-4059
BrandRS PRO
£0.662
Each (In a Pack of 10)
Units
6.3A 6.3 x 32mm T - 500V ac - Ceramic - UL 248-13 - - -
RS Stock No. 611-0030
BrandRS PRO
£0.27
Each (In a Pack of 10)
Units
15A 5 x 20mm T - 250V ac - Glass - - - - -
RS Stock No. 209-9406
BrandRS PRO
£1.725
Each (In a Pack of 10)
Units
10A 6.3 x 32mm FF - 600V ac - Ceramic - - - - -
RS Stock No. 563-598A
BrandRS PRO
£0.105
Each (In a Pack of 100)
Units
8A 5 x 20mm T 5mm 250V ac 20mm Ceramic - - - - -
RS Stock No. 563-598
BrandRS PRO
£0.125
Each (In a Pack of 10)
Units
8A 5 x 20mm T - 250V ac - Ceramic - - - - -
RS Stock No. 668-6082
BrandRS PRO
£0.245
Each (In a Pack of 10)
Units
3A 6.3 x 32mm T - 250V ac - Glass - - - - -
RS Stock No. 563-479
BrandRS PRO
£0.11
Each (In a Pack of 10)
Units
200mA 5 x 20mm F - 250V ac - Glass - - - - -
RS Stock No. 563-659
BrandRS PRO
£0.125
Each (In a Pack of 10)
Units
500mA 5 x 20mm T - 250V ac - Ceramic - - - - -
RS Stock No. 668-6095
BrandRS PRO
£0.41
Each (In a Pack of 10)
Units
15A 6.3 x 32mm T - 250V ac - Glass - - - - -
RS Stock No. 420-123
BrandRS PRO
£1.08
Each (In a Pack of 10)
Units
6.3A 5 x 20mm FF - 250V ac - Ceramic - - - - -
RS Stock No. 413-800
BrandRS PRO
£2.604
Each (In a Pack of 10)
Units
6A 12.7 x 29mm - - 415V ac - - gG - - - MD
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