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 Voltage Rating Overall Length Diameter Body Material Application Category UL Class Fuse Standard Series
RS Stock No. 563-380
BrandRS PRO
PHP6.113
Each (In a Pack of 10)
units
1A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 878-3801
BrandRS PRO
PHP11.573
Each (In a Pack of 100)
units
5A 5 x 20mm F 250V ac - - Glass - - - 217
RS Stock No. 541-3108
BrandRS PRO
PHP13.74
Each (In a Pack of 10)
units
5A 5 x 20mm F 250V ac - - Glass - - - 217
RS Stock No. 563-700
BrandRS PRO
PHP5.236
Each (In a Pack of 10)
units
8A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-633
BrandRS PRO
PHP4.00
Each (In a Pack of 10)
units
500mA 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-621
BrandRS PRO
PHP4.021
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 668-5969
BrandRS PRO
PHP11.556
Each (In a Pack of 10)
units
2A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-526
BrandRS PRO
PHP4.966
Each (In a Pack of 10)
units
5A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 414-061
BrandRS PRO
PHP28.143
Each (In a Pack of 10)
units
10A 6.3 x 32mm T 500V ac - - Ceramic - - - -
RS Stock No. 420-230
BrandRS PRO
PHP81.004
Each (In a Pack of 10)
units
16A 6.3 x 32mm FF 500V ac - - Ceramic - - - -
RS Stock No. 668-5963
BrandRS PRO
PHP10.839
Each (In a Pack of 10)
units
3A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-463
BrandRS PRO
PHP5.813
Each (In a Pack of 10)
units
500mA 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 668-5966
BrandRS PRO
PHP12.699
Each (In a Pack of 10)
units
1A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-532
BrandRS PRO
PHP4.142
Each (In a Pack of 10)
units
5A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 668-6045
BrandRS PRO
PHP10.10
Each (In a Pack of 10)
units
5A 6.3 x 32mm F 250V ac - - Glass - - - -
RS Stock No. 563-334
BrandRS PRO
PHP5.057
Each (In a Pack of 10)
units
10A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-431
BrandRS PRO
PHP6.397
Each (In a Pack of 10)
units
2A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 668-5957
BrandRS PRO
PHP15.247
Each (In a Pack of 10)
units
500mA 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 414-409
BrandRS PRO
PHP51.636
Each (In a Pack of 10)
units
630mA 6.3 x 32mm T 500V ac - - Ceramic - - - -
RS Stock No. 209-9406
BrandRS PRO
PHP125.455
Each (In a Pack of 10)
units
10A 6.3 x 32mm FF 600V ac - - Ceramic - - - -
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