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. 563-722
BrandRS PRO
$0.468
Each (In a Pack of 10)
units
2A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-431
BrandRS PRO
$0.271
Each (In a Pack of 10)
units
2A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-380
BrandRS PRO
$0.381
Each (In a Pack of 10)
units
1A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-592
BrandRS PRO
$0.696
Each (In a Pack of 10)
units
10A 5 x 20mm T 250V ac - - Ceramic - - - UDA
RS Stock No. 563-491
BrandRS PRO
$0.338
Each (In a Pack of 10)
units
3.15A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-643
BrandRS PRO
$0.348
Each (In a Pack of 10)
units
10A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-699
BrandRS PRO
$0.518
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Ceramic - - - -
RS Stock No. 563-413
BrandRS PRO
$0.519
Each (In a Pack of 10)
units
2A 5 x 20mm F 250V ac - - Ceramic - - - -
RS Stock No. 563-693
BrandRS PRO
$0.658
Each (In a Pack of 10)
units
5A 5 x 20mm T 250V ac - - Ceramic - - - -
RS Stock No. 563-633
BrandRS PRO
$0.448
Each (In a Pack of 10)
units
500mA 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 541-3108
BrandRS PRO
$0.408
Each (In a Pack of 10)
units
5A 5 x 20mm F 250V ac - - Glass - - - 217
RS Stock No. 414-061
BrandRS PRO
$1.664
Each (In a Pack of 10)
units
10A 6.3 x 32mm T 500V ac - - Ceramic - - - -
RS Stock No. 563-425
BrandRS PRO
$0.457
Each (In a Pack of 10)
units
6.3A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-463
BrandRS PRO
$0.368
Each (In a Pack of 10)
units
500mA 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 667-0346
BrandRS PRO
$71.85
1 Box of 10
Box(es)
80A 22.2 x 58mm - 415V ac - - - - - - -
RS Stock No. 563-706
BrandRS PRO
$0.331
Each (In a Pack of 10)
units
6.3A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 563-621
BrandRS PRO
$0.404
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-558
BrandRS PRO
$0.368
Each (In a Pack of 10)
units
1A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 169-9433
BrandRS PRO
$0.203
Each (In a Bag of 1000)
units
4A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 537-1521
BrandRS PRO
$0.478
Each (In a Pack of 10)
units
4A 5 x 20mm F 250V ac - - Glass - - - -
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