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. 420-230
BrandRS PRO
$2.733
Each (In a Pack of 10)
units
16 A 6.3 x 32mm FF 500 V ac - - Ceramic - UL 248-13 - -
RS Stock No. 852-7055
Mfr. Part No.MDA-20-R
$3.34
Each
units
20 A 6.3 x 32mm T 250 V ac - - Ceramic - UL 248-14 - MDA
RS Stock No. 703-8437
Mfr. Part No.C14G25
$4.253
Each (In a Pack of 10)
units
25 A 14 x 51mm - 690 V ac - - Ceramic GG - gL - - C14G
RS Stock No. 668-6079
BrandRS PRO
$0.695
Each (In a Pack of 10)
units
2 A 6.3 x 32mm T 250 V ac - - Glass - - - -
RS Stock No. 668-6001
BrandRS PRO
$0.495
Each (In a Pack of 10)
units
4 A 5 x 20mm T 250 V ac - - Glass - - - -
RS Stock No. 703-8406
Mfr. Part No.C10G32
$1.544
Each (In a Pack of 10)
units
32 A 10 x 38mm - 400 V ac - - Ceramic GG - gL - - C10G
RS Stock No. 537-1666
Mfr. Part No.S506-50-R
$1.059
Each (In a Pack of 10)
units
50 mA 5 x 20mm T 250 V ac - - Glass - - - S506
RS Stock No. 209-9361
BrandRS PRO
$2.832
Each (In a Pack of 10)
units
2 A 6.3 x 32mm FF 600 V ac - - Ceramic - - - -
RS Stock No. 537-1559
Mfr. Part No.S501-500-R
$1.011
Each (In a Pack of 10)
units
500 mA 5 x 20mm F 250 V ac - - Ceramic - - - S501
RS Stock No. 169-9436
Mfr. Part No.S501-500-R
$988.05
1 Bag of 1000
Bag(s)
500 mA 5 x 20mm F 250 V ac - - Ceramic - - - S501
RS Stock No. 541-4369
Mfr. Part No.0217.800MXP
BrandLittelfuse
$0.286
Each (In a Pack of 10)
units
800 mA 5 x 20mm F 250 V ac - - Glass - - - 217
RS Stock No. 209-9333
BrandRS PRO
$3.637
Each (In a Pack of 10)
units
20 A 6.3 x 32mm T 440 V ac - - Ceramic - UL 248-13 - -
RS Stock No. 537-0972
Mfr. Part No.S500-8-R
$0.405
Each (In a Pack of 10)
units
8 A 5 x 20mm F 250 V ac - - Glass - - - S500
RS Stock No. 541-3489
Mfr. Part No.021901.6MXAP
BrandLittelfuse
$1.066
Each (In a Pack of 10)
units
1.6 A 5 x 20mm T 250 V ac - - Glass - - - 219XA
RS Stock No. 420-167
BrandRS PRO
$2.389
Each (In a Pack of 10)
units
2 A 6.3 x 32mm FF 700 V ac - - Ceramic - UL 248-13 - -
RS Stock No. 668-5969
BrandRS PRO
$0.232
Each (In a Pack of 10)
units
2 A 5 x 20mm F 250 V ac - - Glass - - - -
RS Stock No. 458-8453
Mfr. Part No.KTK-1/4
$45.454
Each (In a Pack of 5)
units
250 mA 10 x 38mm F 600 V ac - - Melamine - - - KTK
RS Stock No. 725-8057
Mfr. Part No.0218.032MXP
BrandLittelfuse
$3.099
Each (In a Bag of 10)
units
32 mA 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 169-9387
Mfr. Part No.S500-8-R
$352.00
1 Bag of 1000
Bag(s)
8 A 5 x 20mm F 250 V ac - - Glass - - - S500
RS Stock No. 537-1391
$0.608
Each (In a Pack of 10)
units
6.3 A 5 x 20mm F 250 V ac - - Ceramic - - - -