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. 611-8999
BrandRS PRO
PHP48.372
Each (In a Pack of 10)
units
2A 6.3 x 32mm T 250V ac - - Glass - - - -
RS Stock No. 563-457
BrandRS PRO
PHP7.716
Each (In a Pack of 10)
units
1.6A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 911-3388
BrandRS PRO
PHP13.801
Each (In a Pack of 10)
units
800mA 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 537-1521
BrandRS PRO
PHP16.75
Each (In a Pack of 10)
units
4A 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 668-6007
BrandRS PRO
PHP12.223
Each (In a Pack of 10)
units
3A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 911-3394
BrandRS PRO
PHP17.848
Each (In a Pack of 10)
units
1.5A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 563-722
BrandRS PRO
PHP8.087
Each (In a Pack of 10)
units
2A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-728
BrandRS PRO
PHP8.087
Each (In a Pack of 10)
units
1.6A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 563-611
BrandRS PRO
PHP13.577
Each (In a Pack of 10)
units
315mA 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 610-9793
BrandRS PRO
PHP22.554
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Ceramic - - - -
RS Stock No. 177-8089
BrandRS PRO
PHP13.325
Each (In a Pack of 50)
units
6A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 611-0024
BrandRS PRO
PHP19.364
Each (In a Pack of 10)
units
10A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 413-197
BrandRS PRO
PHP43.55
Each (In a Pack of 10)
units
1A 6.3 x 32mm F 500V ac - - Ceramic - UL 248-13 - -
RS Stock No. 413-210
BrandRS PRO
PHP43.55
Each (In a Pack of 10)
units
3A 6.3 x 32mm F 500V ac - - Ceramic - - - 70-065-63
RS Stock No. 563-479
BrandRS PRO
PHP10.112
Each (In a Pack of 10)
units
200mA 5 x 20mm F 250V ac - - Glass - - - -
RS Stock No. 911-3427
BrandRS PRO
PHP12.241
Each (In a Pack of 10)
units
6A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 610-9989
BrandRS PRO
PHP19.364
Each (In a Pack of 10)
units
3.15A 5 x 20mm T 250V ac - - Glass - - - -
RS Stock No. 668-6051
BrandRS PRO
PHP11.277
Each (In a Pack of 10)
units
15A 6.3 x 32mm F 250V ac - - Glass - - - -
RS Stock No. 177-8023
BrandRS PRO
PHP9,695.15
1 Box of 1000
Box(es)
6A 5 x 20mm T 250V ac - - Glass - - - GTE
RS Stock No. 563-605
BrandRS PRO
PHP8.733
Each (In a Pack of 10)
units
1A 5 x 20mm T 250V ac - - Ceramic - - - -
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