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. 537-1111
Mfr. Part No.S505-2.5-R
$0.356
Each (In a Pack of 10)
units
2.5 A 5 x 20mm T 250 V ac - - Ceramic - - - S505
RS Stock No. 715-8991
Mfr. Part No.DCT15-2
BrandMersen
$32.45
Each
units
15 A 10 x 38mm - 1 kV dc - - Melamine - - - -
RS Stock No. 541-4561
Mfr. Part No.0216010.MXP
BrandLittelfuse
$1.292
Each (In a Pack of 10)
units
10 A 5 x 20mm F 250 V ac - - Ceramic - - - 216
RS Stock No. 337-4916
Mfr. Part No.0KLK010.T
BrandLittelfuse
$22.38
Each (In a Pack of 5)
units
10 A 10 x 38mm F 500 V dc, 600 V ac - - Melamine - - - KLK
RS Stock No. 537-0966
Mfr. Part No.S500-10-R
$0.24
Each (In a Pack of 10)
units
10 A 5 x 20mm F 250 V ac - - Glass - - - S500
RS Stock No. 736-1428
Mfr. Part No.50-210-06/0.44A
BrandSIBA
$16.26
Each
units
440 mA 10 x 35mm - 1 kV ac - - Ceramic AR - - URZ
RS Stock No. 541-4319
Mfr. Part No.0217.250MXP
BrandLittelfuse
$1.22
Each (In a Pack of 10)
units
250 mA 5 x 20mm F 250 V ac - - Glass - - - 217
RS Stock No. 783-3273
Mfr. Part No.70-007-65/0.125A
BrandSIBA
$0.742
Each (In a Pack of 10)
units
125 mA 5 x 20mm T 250 V ac - - Ceramic - - - GZ
RS Stock No. 169-9359
Mfr. Part No.TDC10-250MA
$383.58
1 Bag of 1000
Bag(s)
250 mA 6.3 x 32mm F 1 kV ac - - Glass - - - TDC10
RS Stock No. 725-8057
Mfr. Part No.0218.032MXP
BrandLittelfuse
$2.749
Each (In a Bag of 10)
units
32 mA 5 x 20mm T 250 V ac - - Glass - - - 218
RS Stock No. 267-3391
Mfr. Part No.70-010-04/2A
BrandSIBA
$4.48
Each (In a Pack of 5)
units
2 A 5 x 25mm F 250 V ac - - Ceramic - - - GZ
RS Stock No. 169-9436
Mfr. Part No.S501-500-R
$800.18
1 Bag of 1000
Bag(s)
500 mA 5 x 20mm F 250 V ac - - Ceramic - - - S501
RS Stock No. 537-1391
BrandRS PRO
$0.544
Each (In a Pack of 10)
units
6.3 A 5 x 20mm F 250 V ac - - Ceramic - - - -
RS Stock No. 537-1515
Mfr. Part No.S505-2-R
$0.277
Each (In a Pack of 10)
units
2 A 5 x 20mm T 250 V ac - - Ceramic - - - S505
RS Stock No. 209-9333
BrandRS PRO
$3.346
Each (In a Pack of 10)
units
20 A 6.3 x 32mm T 440 V ac - - Ceramic - UL 248-13 - -
RS Stock No. 777-7463
Mfr. Part No.0034.3118
BrandSchurter
$0.511
Each (In a Pack of 10)
units
1.25 A 5 x 20mm T 250 V ac - - Glass - - - FST 5x20
RS Stock No. 541-3489
Mfr. Part No.021901.6MXAP
BrandLittelfuse
$0.994
Each (In a Pack of 10)
units
1.6 A 5 x 20mm T 250 V ac - - Glass - - - 219XA
RS Stock No. 563-346
BrandRS PRO
$0.226
Each (In a Pack of 10)
units
4 A 5 x 20mm F 250 V ac - - Ceramic - - - -
RS Stock No. 820-7209
Mfr. Part No.KLKD030.T
BrandLittelfuse
$20.80
Each
units
30 A 10 x 38mm F 600 V ac/dc - - Melamine - - - KLKD
RS Stock No. 541-4735
Mfr. Part No.0215008.MXP
BrandLittelfuse
$1.441
Each (In a Pack of 10)
units
8 A 5 x 20mm T 250 V ac - - Ceramic - - - 215
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This glass cartridge fuse is ideal for providing ...
Description:
This glass cartridge fuse is ideal for providing protection to devices or internal circuits They are deliberately weaker components which, when too much current is drawn, will blow. Features:Glass cartridge5 x 20 mm cartridge sizeT Speed Rating Anti-surge Low Breaking ...