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. 563-699
BrandRS PRO
R 4.809
Each (In a Pack of 10)
units
3.15 A - 5 x 20mm T - 250 V ac - Ceramic - - - - - -
RS stock no. 563-340
BrandRS PRO
R 2.625
Each (In a Pack of 10)
units
5 A - 5 x 20mm F - 250 V ac - Ceramic - - - - - -
RS stock no. 563-605
BrandRS PRO
R 2.751
Each (In a Pack of 10)
units
1 A - 5 x 20mm T - 250 V ac - Ceramic - - - - - -
RS stock no. 563-453
BrandRS PRO
R 2.468
Each (In a Pack of 10)
units
1.5 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 563-380
BrandRS PRO
R 1.365
Each (In a Pack of 10)
units
1 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 413-850
BrandRS PRO
R 36.112
Each (In a Pack of 10)
units
32 A - 12.7 x 29mm - - 415 V ac - - - GG - - - -
RS stock no. 563-532
BrandRS PRO
R 2.415
Each (In a Pack of 10)
units
5 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 563-592
BrandRS PRO
R 6.30
Each (In a Pack of 10)
units
10 A - 5 x 20mm T - 250 V ac - Ceramic - - - - - -
RS stock no. 563-643
BrandRS PRO
R 1.465
Each (In a Pack of 10)
units
10 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 668-6045
BrandRS PRO
R 1.982
Each (In a Pack of 10)
units
5 A - 6.3 x 32mm F - 250 V ac - Glass - - - - - -
RS stock no. 563-621
BrandRS PRO
R 2.52
Each (In a Pack of 10)
units
3.15 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 563-334
BrandRS PRO
R 1.606
Each (In a Pack of 10)
units
10 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 563-722
BrandRS PRO
R 1.628
Each (In a Pack of 10)
units
2 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 563-558
BrandRS PRO
R 1.448
Each (In a Pack of 10)
units
1 A - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 668-5985
BrandRS PRO
R 3.381
Each (In a Pack of 10)
units
500 mA - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 563-431
BrandRS PRO
R 1.356
Each (In a Pack of 10)
units
2 A - 5 x 20mm F - 250 V ac - Glass - - - - - -
RS stock no. 563-362
BrandRS PRO
R 2.025
Each (In a Pack of 10)
units
200 mA - 5 x 20mm T - 250 V ac - Glass - - - - - -
RS stock no. 420-123
BrandRS PRO
R 22.827
Each (In a Pack of 10)
units
6.3 A - 5 x 20mm FF - 250 V ac - Ceramic - - - - - -
RS stock no. 420-167
BrandRS PRO
R 22.008
Each (In a Pack of 10)
units
2 A - 6.3 x 32mm FF - 700 V ac - Ceramic - - - UL 248-13 - -
RS stock no. 563-520
BrandRS PRO
R 4.851
Each (In a Pack of 10)
units
10 A - 5 x 20mm F - 250 V ac - Ceramic - - - - - -