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. 563-649
BrandRS PRO
MYR0.964
Each (In a Pack of 10)
units
3A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-722
BrandRS PRO
MYR0.649
Each (In a Pack of 10)
units
2A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 209-9276
BrandRS PRO
MYR3.493
Each (In a Pack of 10)
units
500mA 6.3 x 32mm F 500V ac - - Ceramic - - - -
RS Stock No. 563-699
BrandRS PRO
MYR1.285
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Ceramic - - - -
RS Stock No. 413-204
BrandRS PRO
MYR3.899
Each (In a Pack of 10)
units
2A 6.3 x 32mm F 500V ac - - Ceramic - - - -
RS Stock No. 413-210
BrandRS PRO
MYR3.493
Each (In a Pack of 10)
units
3A 6.3 x 32mm F 500V ac - - Ceramic - - - 70-065-63
RS Stock No. 413-197
BrandRS PRO
MYR3.493
Each (In a Pack of 10)
units
1A 6.3 x 32mm F 500V ac - - Ceramic - UL 248-13 - -
RS Stock No. 413-226
BrandRS PRO
MYR2.43
Each (In a Pack of 10)
units
5A 6.3 x 32mm F 500V ac - - Ceramic - - - -
RS Stock No. 420-151
BrandRS PRO
MYR12.986
Each (In a Pack of 10)
units
1.6A 6.3 x 32mm FF 700V ac - - Ceramic - - - -
RS Stock No. 721-1563
BrandRS PRO
MYR9.312
Each (In a Pack of 10)
units
500mA 6.3 x 32mm FF 700V ac - - Ceramic - - - -
RS Stock No. 209-9333
BrandRS PRO
MYR7.478
Each (In a Pack of 10)
units
20A 6.3 x 32mm T 440V ac - - Ceramic - UL 248-13 - -
RS Stock No. 563-558
BrandRS PRO
MYR0.649
Each (In a Pack of 10)
units
1A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 611-0254
BrandRS PRO
MYR3.624
Each (In a Pack of 10)
units
1.5A 6.3 x 32mm T 250V ac - - Glass - - - -
RS Stock No. 414-061
BrandRS PRO
MYR4.01
Each (In a Pack of 10)
units
10A 6.3 x 32mm T 500V ac - - Ceramic - - - -
RS Stock No. 563-334
BrandRS PRO
MYR0.75
Each (In a Pack of 10)
units
10A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 721-1588
BrandRS PRO
MYR3.493
Each (In a Pack of 10)
units
1.6A 6.3 x 32mm F 500V ac - - Ceramic - - - -
RS Stock No. 247-4059
BrandRS PRO
MYR2.887
Each (In a Pack of 10)
units
6.3A 6.3 x 32mm T 500V ac - - Ceramic - - - -
RS Stock No. 563-728
BrandRS PRO
MYR0.649
Each (In a Pack of 10)
units
1.6A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 668-6045
BrandRS PRO
MYR0.851
Each (In a Pack of 10)
units
5A 6.3 x 32mm F 250V ac - - Glass - - - -
RS Stock No. 563-425
BrandRS PRO
MYR0.649
Each (In a Pack of 10)
units
6.3A 5 x 20mm T 250V ac - - Glass - - - -
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