Cartridge Fuses

Cartridge fuses are low-cost electrical safety devices that are used for the overload protection of 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. For more information on cartridge fuses please see our complete guide to fuses.

RS Components stock a comprehensive range of cartridge fuses from industry-leading brands including Cooper Bussmann, Littelfuse, Mersen and of course RS PRO.

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 to make the circuit complete again and allow the flow of current.

What are the different types of fuse markings and speed codes?

Cylindrical cartridge fuses are used in a range of industrial, commercial, and domestic applications. Selecting the correct fuse speed is essential for the protection of your device. Here are some of the most common markings you will find on a cartridge fuse.

  • FF = Very Fast Acting (Flink Flink)
  • F = Fast Acting (Flink)
  • M = Medium Acting (Mitteltrage)
  • T = Slow Acting (Trage)
  • TT = Very Slow Acting (Trage Trage)

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.

What current rating should you choose?

Cartridge fuses are available in a range of standard amperages. 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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Beskrivning Pris 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-artikelnummer 420-230
VarumärkeRS PRO
19,888 kr
Each (In a Pack of 10)
Enheter
16A - 6.3 x 32mm FF - 500V ac - Ceramic - - - UL 248-13 - -
RS-artikelnummer 413-850
VarumärkeRS PRO
32,483 kr
Each (In a Pack of 10)
Enheter
32A 13mm 13 x 29mm - 13 x 29mm 415V ac 29mm - - gG - - - -
RS-artikelnummer 209-9333
VarumärkeRS PRO
19,44 kr
Each (In a Pack of 10)
Enheter
20A - 6.3 x 32mm T 6.3 x 32mm 440V ac - Ceramic - - - UL 248-13 - -
RS-artikelnummer 563-558
VarumärkeRS PRO
2,165 kr
Each (In a Pack of 10)
Enheter
1A 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 563-558A
VarumärkeRS PRO
1,791 kr
Each (In a Pack of 100)
Enheter
1A 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 563-693
VarumärkeRS PRO
3,818 kr
Each (In a Pack of 10)
Enheter
5A 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Ceramic - - - - - -
RS-artikelnummer 563-693A
VarumärkeRS PRO
1,998 kr
Each (In a Pack of 100)
Enheter
5A 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Ceramic - - - - - -
RS-artikelnummer 668-5963
VarumärkeRS PRO
2,773 kr
Each (In a Pack of 10)
Enheter
3A - 5 x 20mm F 5 x 20mm 250V ac - Glass - - - - - -
RS-artikelnummer 563-659
VarumärkeRS PRO
2,869 kr
Each (In a Pack of 10)
Enheter
500mA 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Ceramic - - - - - -
RS-artikelnummer 563-722A
VarumärkeRS PRO
1,657 kr
Each (In a Pack of 100)
Enheter
2A 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 563-722
VarumärkeRS PRO
2,165 kr
Each (In a Pack of 10)
Enheter
2A 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 563-633
VarumärkeRS PRO
2,165 kr
Each (In a Pack of 10)
Enheter
500mA 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 563-469
VarumärkeRS PRO
2,133 kr
Each (In a Pack of 10)
Enheter
250mA 5mm 5 x 20mm F 5 x 20mm 250V ac 20mm Glass - - - E82636 - -
RS-artikelnummer 563-633A
VarumärkeRS PRO
1,791 kr
Each (In a Pack of 100)
Enheter
500mA 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 420-224A
VarumärkeRS PRO
13,949 kr
Each (In a Pack of 100)
Enheter
12.5A 6.3mm 6.3 x 32mm FF 6.3 x 32mm 500V ac 32mm Ceramic - - - UL 248-13 - -
RS-artikelnummer 563-526
VarumärkeRS PRO
2,122 kr
Each (In a Pack of 10)
Enheter
5A 5mm 5 x 20mm F 5 x 20mm 250V ac 20mm Glass - - - - - -
RS-artikelnummer 413-800
VarumärkeRS PRO
38,38 kr
Each (In a Pack of 10)
Enheter
6A 13mm 13 x 29mm - 13 x 29mm 415V ac 29mm - - gG - - - -
RS-artikelnummer 420-167
VarumärkeRS PRO
16,359 kr
Each (In a Pack of 10)
Enheter
2A - 6.3 x 32mm FF - 700V ac - Ceramic - - - UL 248-13 - -
RS-artikelnummer 563-352
VarumärkeRS PRO
2,869 kr
Each (In a Pack of 10)
Enheter
630mA 5mm 5 x 20mm T 5 x 20mm 250V ac 20mm Ceramic - - - - - -
RS-artikelnummer 420-224
VarumärkeRS PRO
25,476 kr
Each (In a Pack of 10)
Enheter
12.5A - 6.3 x 32mm FF - 500V ac - Ceramic - - - UL 248-13 - -