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. 167-7538
Mfr. Part No.0034.3111
BrandSchurter
$0.639
Each (In a Pack of 10)
units
250 mA 5 x 20mm T 250 V ac - - Glass - - - FST 5x20
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. 541-3035
Mfr. Part No.0313003.MXP
BrandLittelfuse
$1.11
Each (In a Pack of 10)
units
3 A 6.3 x 32mm T 250 V ac - - Glass - - - 313
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. 247-4021
BrandRS PRO
$3.93
Each (In a Pack of 10)
units
32 A 6.3 x 32mm T 250 V ac - - Ceramic - - - -
RS Stock No. 876-8114
Mfr. Part No.FLM 1
BrandLittelfuse
$19.93
Each
units
1 A 10 x 38mm T 250 V ac - - - - - - FLM
RS Stock No. 169-9396
Mfr. Part No.S505-2.5-R
$416.96
1 Bag of 1000
Bag(s)
2.5 A 5 x 20mm T 250 V ac - - Ceramic - - - S505
RS Stock No. 911-3405
BrandRS PRO
$0.342
Each (In a Pack of 10)
units
3 A 5 x 20mm T 250 V ac - - Glass - - - GTE
RS Stock No. 610-9765
BrandRS PRO
$0.731
Each (In a Pack of 10)
units
1 A 5 x 20mm T 250 V ac - - Ceramic - - - -
RS Stock No. 537-1290
Mfr. Part No.S500-100-R
$8.59
Each (In a Pack of 10)
units
100 mA 5 x 20mm F 250 V ac - - Glass - - - S500
RS Stock No. 851-1671
Mfr. Part No.FNQ-15
$50.02
Each
units
15 A 10 x 38mm T 500 V ac - - Fibre - - - FNQ
RS Stock No. 777-7495
Mfr. Part No.0034.1523
BrandSchurter
$0.541
Each (In a Pack of 10)
units
5 A 5 x 20mm F 250 V ac - - Glass - - - FSF 5x20
RS Stock No. 177-8020
BrandRS PRO
$275.65
1 Box of 1000
Box(es)
3 A 5 x 20mm T 250 V ac - - Glass - - - GTE
RS Stock No. 412-223
Mfr. Part No.TDC10-250MA
$0.433
Each (In a Pack of 10)
units
250 mA 6.3 x 32mm F 1 kV ac - - Glass - - - TDC10
RS Stock No. 769-0082
Mfr. Part No.0313003.HXP
BrandLittelfuse
$1.17
Each (In a Pack of 10)
units
3 A 6.3 x 32mm T 250 V ac - - Glass - - - 313
RS Stock No. 541-4331
Mfr. Part No.0217.400MXP
BrandLittelfuse
$0.408
Each (In a Pack of 10)
units
400 mA 5 x 20mm F 250 V ac - - Glass - - - 217
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. 169-9413
Mfr. Part No.S500-100-R
$4,370.00
1 Bag of 1000
Bag(s)
100 mA 5 x 20mm F 250 V ac - - Glass - - - S500
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. 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
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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 ...