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. 878-3346
Mfr. Part No.0218.315HXP
BrandLittelfuse
TWD32.80
Each (In a Pack of 50)
units
315 mA 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 878-4030
Mfr. Part No.0312003.VXP
BrandLittelfuse
TWD41.80
Each (In a Pack of 5)
units
3 A 6.3 x 32mm F 250 V ac - - Glass - UL 248-14 - 312
RS Stock No. 563-609
BrandRS PRO
TWD5.50
Each (In a Pack of 10)
units
2 A 5 x 20mm T 250 V ac - - Ceramic - - - -
RS Stock No. 537-1385
Mfr. Part No.S506-500-R
TWD6.60
Each (In a Pack of 10)
units
500 mA 5 x 20mm T 250 V ac - - Glass - - - S506
RS Stock No. 876-8353
Mfr. Part No.KLKD012.T
BrandLittelfuse
TWD702.00
Each
units
12 A 10 x 38mm F 600 V ac/dc - - Melamine - UL 248 - KLKD
RS Stock No. 563-520
BrandRS PRO
TWD8.20
Each (In a Pack of 10)
units
10 A 5 x 20mm F 250 V ac - - Ceramic - - - -
RS Stock No. 563-554
BrandRS PRO
TWD4.90
Each (In a Pack of 10)
units
800 mA 5 x 20mm T 250 V ac - - Glass - - - -
RS Stock No. 173-7895
Mfr. Part No.8020.0517.PT
BrandSchurter
TWD7,120.00
1 Box of 1000
Box(es)
2 A 3.6 x 10mm T 250 V ac - - Ceramic - - - SPT 3.6x10
RS Stock No. 169-9430
Mfr. Part No.S505-5-R
TWD8,450.00
1 Bag of 1000
Bag(s)
5 A 5 x 20mm T 250 V ac - - Ceramic - - - S505
RS Stock No. 703-8500
Mfr. Part No.C10M10
TWD50.10
Each (In a Pack of 10)
units
10 A 10 x 38mm - 500 V ac - - Ceramic AM - - C10M
RS Stock No. 537-1436
Mfr. Part No.S501-2-R
TWD12.20
Each (In a Pack of 10)
units
2 A 5 x 20mm F 250 V ac - - Ceramic - - - S501
RS Stock No. 337-5256
Mfr. Part No.0KLK020.T
BrandLittelfuse
TWD446.60
Each (In a Pack of 5)
units
20 A 10 x 38mm F 500 V dc, 600 V ac - - Melamine - - - KLK
RS Stock No. 848-4046
Mfr. Part No.JJN-30
TWD1,356.00
Each
units
30 A 10.3 x 22.2mm F 160 V dc, 300 V ac - - - - - - JJN
RS Stock No. 541-3489
Mfr. Part No.021901.6MXAP
BrandLittelfuse
TWD21.60
Each (In a Pack of 10)
units
1.6 A 5 x 20mm T 250 V ac - - Glass - - - 219XA
RS Stock No. 458-8504
Mfr. Part No.KTK-1
TWD799.60
Each (In a Pack of 5)
units
1 A 10 x 38mm F 600 V ac - - Melamine - - - KTK
RS Stock No. 293-8272
Mfr. Part No.0 126 20
BrandLegrand
TWD81.70
Each (In a Pack of 10)
units
20 A 10.3 x 22.2mm F 400 V ac - - Ceramic - - - 0 126
RS Stock No. 537-1492
Mfr. Part No.S505-5-R
TWD9.10
Each (In a Pack of 10)
units
5 A 5 x 20mm T 250 V ac - - Ceramic - - - S505
RS Stock No. 769-0102
Mfr. Part No.0312003.HXP
BrandLittelfuse
TWD29.00
Each (In a Pack of 10)
units
3 A 6.3 x 32mm F 250 V ac - - Glass - UL 248-14 - 312
RS Stock No. 167-8121
Mfr. Part No.0034.3125
BrandSchurter
TWD13.00
Each (In a Pack of 10)
units
6.3 A 5 x 20mm T 250 V ac - - Glass - - - FST 5x20
RS Stock No. 169-9425
Mfr. Part No.S501-2-R
TWD11,230.00
1 Bag of 1000
Bag(s)
2 A 5 x 20mm F 250 V ac - - Ceramic - - - S501