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. 769-0063
Mfr. Part No.0313001.HXP
BrandLittelfuse
TWD25.90
Each (In a Pack of 10)
units
1 A 6.3 x 32mm T 250 V ac - - Glass - - - 313
RS Stock No. 541-4460
Mfr. Part No.0216.500MXP
BrandLittelfuse
TWD38.00
Each (In a Pack of 10)
units
500 mA 5 x 20mm F 250 V ac - - Ceramic - - - 216
RS Stock No. 541-3007
Mfr. Part No.0313001.MXP
BrandLittelfuse
TWD24.60
Each (In a Pack of 10)
units
1 A 6.3 x 32mm T 250 V ac - - Glass - - - 313
RS Stock No. 878-3839
Mfr. Part No.0216.500HXP
BrandLittelfuse
TWD33.50
Each (In a Pack of 100)
units
500 mA 5 x 20mm F 250 V ac - - Ceramic - - - 216
RS Stock No. 541-2947
Mfr. Part No.021301.6MXP
BrandLittelfuse
TWD23.60
Each (In a Pack of 10)
units
1.6 A 5 x 20mm T 250 V ac - - Glass - - - 213
RS Stock No. 541-4684
Mfr. Part No.0215002.MXP
BrandLittelfuse
TWD38.60
Each (In a Pack of 10)
units
2 A 5 x 20mm T 250 V ac - - Ceramic - - - 215
RS Stock No. 878-3781
Mfr. Part No.0218005.HXP
BrandLittelfuse
TWD26.00
Each (In a Pack of 50)
units
5 A 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 738-2790
Mfr. Part No.0218005.MXP
BrandLittelfuse
TWD24.70
Each (In a Pack of 10)
units
5 A 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 541-4678
Mfr. Part No.0215001.MXP
BrandLittelfuse
TWD38.60
Each (In a Pack of 10)
units
1 A 5 x 20mm T 250 V ac - - Ceramic - - - 215
RS Stock No. 769-0118
Mfr. Part No.0215.250TXP
BrandLittelfuse
TWD38.00
Each (In a Pack of 10)
units
250 mA 5 x 20mm T 250 V ac - - Ceramic - - - 215
RS Stock No. 541-3754
Mfr. Part No.0215.250MXP
BrandLittelfuse
TWD38.00
Each (In a Pack of 10)
units
250 mA 5 x 20mm T 250 V ac - - Ceramic - - - 215
RS Stock No. 541-4230
Mfr. Part No.0218.500MXP
BrandLittelfuse
TWD24.70
Each (In a Pack of 10)
units
500 mA 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 541-2981
Mfr. Part No.0213005.MXP
BrandLittelfuse
TWD30.20
Each (In a Pack of 10)
units
5 A 5 x 20mm T 250 V ac - - Glass - - - 213
RS Stock No. 541-4533
Mfr. Part No.0218010.MXP
BrandLittelfuse
TWD38.60
Each (In a Pack of 10)
units
10 A 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 878-3784
Mfr. Part No.0218010.HXP
BrandLittelfuse
TWD40.30
Each (In a Pack of 50)
units
10 A 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 878-3974
Mfr. Part No.0218.500HXP
BrandLittelfuse
TWD21.70
Each (In a Pack of 100)
units
500 mA 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 878-3504
Mfr. Part No.0313.750HXP
BrandLittelfuse
TWD25.90
Each (In a Pack of 50)
units
750 mA 6.3 x 32mm T 250 V ac - - Glass - - - 313
RS Stock No. 878-3889
Mfr. Part No.0230002.HXP
BrandLittelfuse
TWD33.20
Each (In a Pack of 5)
units
2 A 5 x 15mm T 250 V ac - - Glass - - - 230
RS Stock No. 769-0102
Mfr. Part No.0312003.HXP
BrandLittelfuse
TWD33.30
Each (In a Pack of 10)
units
3 A 6.3 x 32mm F 250 V ac - - Glass - - - 312
RS Stock No. 337-5256
Mfr. Part No.0KLK020.T
BrandLittelfuse
TWD502.60
Each (In a Pack of 5)
units
20 A 10 x 38mm F 500 V dc, 600 V ac - - Melamine - - - KLK