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. 537-1010
BrandRS PRO
$9.33
Each (In a Pack of 10)
units
8A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 178-4155
BrandRS PRO
$275.65
1 Box of 1000
Box(es)
1A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 911-3394
BrandRS PRO
$0.342
Each (In a Pack of 10)
units
1.5A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 721-1579
BrandRS PRO
$2.522
Each (In a Pack of 10)
units
4A 6.3 x 32mm FF 500V ac - - Ceramic - - - -
RS Stock No. 563-457
BrandRS PRO
$0.215
Each (In a Pack of 10)
units
1.6A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 177-8086
BrandRS PRO
$0.372
Each (In a Pack of 50)
units
3A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 247-4021
BrandRS PRO
$3.93
Each (In a Pack of 10)
units
32A 6.3 x 32mm T 250V ac - - Ceramic - - - -
RS Stock No. 668-6073
BrandRS PRO
$0.503
Each (In a Pack of 10)
units
2.5A 6.3 x 32mm T 250V ac - - Glass - - - -
RS Stock No. 177-8020
BrandRS PRO
$275.65
1 Box of 1000
Box(es)
3A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 563-435
BrandRS PRO
$0.215
Each (In a Pack of 10)
units
2.5A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 911-3405
BrandRS PRO
$0.342
Each (In a Pack of 10)
units
3A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 610-9765
BrandRS PRO
$0.731
Each (In a Pack of 10)
units
1A 5 x 20mm T 250V ac - - Ceramic - - - -
RS Stock No. 209-9333
BrandRS PRO
$3.346
Each (In a Pack of 10)
units
20A 6.3 x 32mm T 440V ac - - Ceramic - UL 248-13 - -
RS Stock No. 420-167
BrandRS PRO
$2.124
Each (In a Pack of 10)
units
2A 6.3 x 32mm FF 700V ac - - Ceramic - - - -
RS Stock No. 668-6079
BrandRS PRO
$0.639
Each (In a Pack of 10)
units
2A 6.3 x 32mm T 250V ac - - Glass - - - -
RS Stock No. 537-1391
BrandRS PRO
$0.544
Each (In a Pack of 10)
units
6.3A 5 x 20mm F 250V ac - - Ceramic - - - -
RS Stock No. 420-230
BrandRS PRO
$2.43
Each (In a Pack of 10)
units
16A 6.3 x 32mm FF 500V ac - - Ceramic - - - -
RS Stock No. 563-346
BrandRS PRO
$0.226
Each (In a Pack of 10)
units
4A 5 x 20mm F 250V ac - - Ceramic - - - -
RS Stock No. 209-9361
BrandRS PRO
$2.538
Each (In a Pack of 10)
units
2A 6.3 x 32mm FF 600V ac - - Ceramic - - - -
RS Stock No. 668-6001
BrandRS PRO
$0.455
Each (In a Pack of 10)
units
4A 5 x 20mm T 250V ac - - Glass - - - -
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This glass cartridge fuse is ideal for providing ...
Description:
This glass cartridge fuse is ideal for providing protection to devices or internal circuits They are deliberately weaker components which, when too much current is drawn, will blow. Features:Glass cartridge5 x 20 mm cartridge sizeT Speed Rating Anti-surge Low Breaking ...