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 Diameter Fuse Size Fuse Speed Overall Dimensions Voltage Rating Overall Length Body Material High Rupture Capacity Application Category Breaking Capacity at Maximum Voltage Rating UL Class Includes Indicator Size Designation
RS Stock No. 188-6956
Mfr. Part No.D213098
BrandMersen
€0.922
Each (In a Pack of 10)
units
2A - 10 x 38mm - - 500V ac - Ceramic - gG - - - -
RS Stock No. 188-7303
Mfr. Part No.A211554
BrandMersen
€1.589
Each (In a Pack of 10)
units
16A - 14 x 51mm - - 690V ac - Ceramic - gG - - - -
RS Stock No. 188-7000
Mfr. Part No.G200750
BrandMersen
€1.013
Each (In a Pack of 10)
units
16A - 10 x 38mm - - 500V ac - Ceramic - gG - - - -
RS Stock No. 188-6984
Mfr. Part No.S218194
BrandMersen
€1.00
Each (In a Pack of 10)
units
10A - 10 x 38mm - - 500V ac - Ceramic - gG - - - -
RS Stock No. 188-6962
Mfr. Part No.X213598
BrandMersen
€1.014
Each (In a Pack of 10)
units
4A - 10 x 38mm - - 500V ac - Ceramic - gG - - - -
RS Stock No. 816-8937
Mfr. Part No.H090512
BrandMersen
€0.431
Each (In a Pack of 10)
units
500mA - 5 x 20mm 5SF - 250V ac - Glass - - - - - -
RS Stock No. 914-4348
Mfr. Part No.ATM2
BrandMersen
€6.95
Each
units
2A - 10 x 38mm F - 600V ac - GMG - - - - - -
RS Stock No. 188-7044
Mfr. Part No.F222208
BrandMersen
€1.159
Each (In a Pack of 10)
units
6A - 10 x 38mm - - 500V ac - Ceramic - aM - - - -
RS Stock No. 304-1048
Mfr. Part No.A214107
BrandMersen
€1.122
Each (In a Pack of 10)
units
32A - 10 x 38mm - - 400V ac - Ceramic - gG - - - -
RS Stock No. 188-7274
Mfr. Part No.F214618
BrandMersen
€1.088
Each (In a Pack of 10)
units
16A - 10 x 38mm - - 500V ac - Ceramic - aM - - - -
RS Stock No. 188-7038
Mfr. Part No.W219232
BrandMersen
€1.213
Each (In a Pack of 10)
units
4A - 10 x 38mm - - 500V ac - Ceramic - aM - - - -
RS Stock No. 188-6827
Mfr. Part No.Z084317
BrandMersen
€4.20
Each (In a Pack of 10)
units
16A - 6.3 x 32mm F - 250V ac - Ceramic - - - - - -
RS Stock No. 230-3474
Mfr. Part No.D211028
BrandMersen
€1.188
Each (In a Pack of 10)
units
20A - 10 x 38mm - - 500V ac - Ceramic - gG - - - -
RS Stock No. 188-7410
Mfr. Part No.E211558
BrandMersen
€1.928
Each (In a Pack of 10)
units
50A - 14 x 51mm - - 400V ac - Ceramic - aM - - - -
RS Stock No. 188-6849
Mfr. Part No.A084318
BrandMersen
€3.292
Each (In a Pack of 10)
units
20A - 6.3 x 32mm FF - 250V ac - Ceramic - - - - - -
RS Stock No. 230-3496
Mfr. Part No.X216151
BrandMersen
€1.508
Each (In a Pack of 10)
units
20A - 10 x 38mm - - 500V ac - Ceramic - aM - - - -
RS Stock No. 188-6978
Mfr. Part No.K215128
BrandMersen
€0.922
Each (In a Pack of 10)
units
6A - 10 x 38mm - - 500V ac - Ceramic - gG - - - -
RS Stock No. 188-6732
Mfr. Part No.K084304
BrandMersen
€2.683
Each (In a Pack of 10)
units
1A - 6.3 x 32mm FF - 250V ac - Ceramic - - - - - -
RS Stock No. 806-8439
Mfr. Part No.ATQR12
BrandMersen
€12.964
Each (In a Pack of 10)
units
12A - 10 x 38mm T - 600V ac - - - - - - - -
RS Stock No. 715-9008
Mfr. Part No.DCT20-2
BrandMersen
€10.49
Each
units
20A - 10 x 38mm - - 1kV dc - Glass Melamine - - - - - -