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 Series
RS Stock No. 777-7473
Mfr. Part No.0034.3117
BrandSchurter
$0.626
Each (In a Pack of 10)
units
1A 5 x 20mm T 250V ac - - Glass - - FST 5x20
RS Stock No. 789-7781
Mfr. Part No.0001.2507
BrandSchurter
$0.818
Each (In a Bag of 10)
units
2A 5 x 20mm T 250 V ac, 300 V dc - - Ceramic - - SPT 5X20
RS Stock No. 167-7601
Mfr. Part No.0034.1529
BrandSchurter
$1.167
Each (In a Pack of 10)
units
50mA 5 x 20mm F 250V ac - - Glass - - FSF 5x20
RS Stock No. 777-7489
Mfr. Part No.0034.1519
BrandSchurter
$0.515
Each (In a Pack of 10)
units
2A 5 x 20mm F 250V ac - - Glass - - FSF 5x20
RS Stock No. 167-7702
Mfr. Part No.0034.1516
BrandSchurter
$0.53
Each (In a Pack of 10)
units
1A 5 x 20mm F 250V ac - - Glass - - FSF 5x20
RS Stock No. 777-7491
Mfr. Part No.0034.3114
BrandSchurter
$0.626
Each (In a Pack of 10)
units
500mA 5 x 20mm T 250V ac - - Glass - - FST 5x20
RS Stock No. 167-6169
Mfr. Part No.0034.3129
BrandSchurter
$1.02
Each (In a Pack of 10)
units
16A 5 x 20mm T 250V ac - - Glass - - FST 5x20
RS Stock No. 167-7538
Mfr. Part No.0034.3111
BrandSchurter
$0.626
Each (In a Pack of 10)
units
250mA 5 x 20mm T 250V ac - - Glass - - FST 5x20
RS Stock No. 777-7495
Mfr. Part No.0034.1523
BrandSchurter
$0.53
Each (In a Pack of 10)
units
5A 5 x 20mm F 250V ac - - Glass - - FSF 5x20
RS Stock No. 777-7463
Mfr. Part No.0034.3118
BrandSchurter
$0.511
Each (In a Pack of 10)
units
1.25A 5 x 20mm T 250V ac - - Glass - - FST 5x20
RS Stock No. 167-6153
Mfr. Part No.0034.3127
BrandSchurter
$0.626
Each (In a Pack of 10)
units
10A 5 x 20mm T 250V ac - - Glass - - FST 5x20
RS Stock No. 703-2675
Mfr. Part No.8020.0607.G
BrandSchurter
$1.62
Each (In a Pack of 10)
units
30A 6.3 x 32mm T 250V ac - - Ceramic - - SUT 6.3x32
RS Stock No. 789-7842
Mfr. Part No.0034.1526
BrandSchurter
$0.572
Each (In a Bag of 10)
units
10A 5 x 20mm F 250V ac - - Glass - - FSF 5x20
RS Stock No. 167-7869
Mfr. Part No.0001.1004
BrandSchurter
$0.632
Each (In a Pack of 10)
units
1A 5 x 20mm F 250V ac - - Ceramic - - SP 5X20
RS Stock No. 173-7913
Mfr. Part No.8020.0607.G
BrandSchurter
$0.681
Each (In a Box of 1000)
units
30A 6.3 x 32mm T 250V ac - - Ceramic - - SUT 6.3x32
RS Stock No. 789-7836
Mfr. Part No.0034.1521
BrandSchurter
$0.509
Each (In a Bag of 10)
units
3.15A 5 x 20mm F 250V ac - - Glass - - FSF 5x20
RS Stock No. 167-8632
Mfr. Part No.34.514
BrandSchurter
$2.395
Each (In a Pack of 10)
units
6A 6.3 x 32mm F 250V ac - - Glass - - FSF 6.3x32
RS Stock No. 703-2641
Mfr. Part No.8020.0604.PT
BrandSchurter
$1.87
Each (In a Pack of 10)
units
15A 6.3 x 32mm T 250V ac - - Ceramic - - SUT 6.3x32
RS Stock No. 789-7788
Mfr. Part No.0001.2514
BrandSchurter
$0.857
Each (In a Bag of 10)
units
10A 5 x 20mm T 150 V dc, 250 V ac - - Ceramic - - SPT 5X20
RS Stock No. 777-7482
Mfr. Part No.0034.1509
BrandSchurter
$0.601
Each (In a Pack of 10)
units
200mA 5 x 20mm F 250V ac - - Glass - - FSF 5x20