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. 611-9009
BrandRS PRO
$1.35
Each (In a Pack of 10)
units
4A 6.3 x 32mm T 250V ac - - Glass - - - -
RS Stock No. 769-6336
BrandRS PRO
$1.844
Each (In a Pack of 10)
units
630mA 5 x 20mm FF 250V ac - - Ceramic - - - -
RS Stock No. 911-3495
BrandRS PRO
$0.333
Each (In a Pack of 10)
units
2A 5 x 20mm T 250V ac - - Ceramic - - - UDA-P
RS Stock No. 911-3509
BrandRS PRO
$0.342
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Ceramic - - - UDA-P
RS Stock No. 610-9888
BrandRS PRO
$0.54
Each (In a Pack of 10)
units
250mA 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-497
BrandRS PRO
$0.461
Each (In a Pack of 10)
units
8A 5 x 20mm F 250V ac - - Ceramic - - - -
RS Stock No. 610-9973
BrandRS PRO
$0.54
Each (In a Pack of 10)
units
2.5A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-665
BrandRS PRO
$0.28
Each (In a Pack of 10)
units
630mA 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 610-9709
BrandRS PRO
$0.561
Each (In a Pack of 10)
units
3.15A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 413-800
BrandRS PRO
$5.39
Each (In a Pack of 10)
units
6A 12.7 x 29mm - 415V ac - - - gG - - MD
RS Stock No. 721-1575
BrandRS PRO
$2.124
Each (In a Pack of 10)
units
2.5A 6.3 x 32mm FF 500V ac - - Ceramic - - - -
RS Stock No. 610-9850
BrandRS PRO
$0.54
Each (In a Pack of 10)
units
100mA 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 610-9670
BrandRS PRO
$0.428
Each (In a Pack of 10)
units
1.6A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 911-3388
BrandRS PRO
$0.342
Each (In a Pack of 10)
units
800mA 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 911-3372
BrandRS PRO
$0.342
Each (In a Pack of 10)
units
500mA 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 413-793
BrandRS PRO
$5.761
Each (In a Pack of 10)
units
4A 12.7 x 29mm - 415V ac - - - gG - - MD
RS Stock No. 610-9995
BrandRS PRO
$0.54
Each (In a Pack of 10)
units
4A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 420-173
BrandRS PRO
$3.21
Each (In a Pack of 10)
units
3.15A 6.3 x 32mm FF 500V ac - - Ceramic - - - -
RS Stock No. 721-1594
BrandRS PRO
$1.441
Each (In a Pack of 10)
units
2.5A 5 x 20mm FF 250V ac - - Ceramic - - - -
RS Stock No. 721-1591
BrandRS PRO
$1.441
Each (In a Pack of 10)
units
2.5A 6.3 x 32mm T 500V ac - - Ceramic - - - -
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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 ...