3 Amp Fuses

3a fuses (sometimes written as 3-amp fuses) are common components in many types of household and workplace plugs and other electrical devices, both in the UK and elsewhere.

What are 3a fuses commonly used for?

3a fuses, specifically, are most often associated with the sorts of household plugs used to supply power to smaller and less powerful appliances around the home and office.

In the UK, household plugs are often fitted either with a 3a fuse (if they supply a device or appliance that’s relatively low-powered), or a 13a fuse (for more power-hungry equipment and larger machinery)

The general rule of thumb states that fuses will typically be rated according to the approximate power rating of the appliance they’re protecting - this is why it’s important to always check you’re replacing a fuse with an equally rated one (assuming the one that just blew was in fact correctly rated for the device in question!)

Broadly speaking, the familiar type of red 3a fuses we’ve all seen in many household plugs and devices are usually advised for supplying appliances that draw up to around 700 watts from the wall - this might include equipment such as:

  • Standard lamps, occasional lighting and other standalone illumination fixtures and fittings
  • Smaller (older) or more efficient (larger, modern) TVs, DVD players, and other relatively low-draw entertainment devices
  • Smaller and less power-hungry kitchen appliances, e.g. fridges, freezers and blenders (as opposed to much higher-powered devices like kettles and toasters)
  • Various mid-range tools and workshop appliances, including soldering irons, handheld drills, jig saws and more

...
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Description Price Current Rating Fuse Size Fuse Speed Diameter Voltage Rating Overall Length Body Material Application Category UL Class Fuse Standard Priced to Clear Series
RS Stock No. 668-6007
BrandRS PRO
£0.155
Each (In a Pack of 10)
Units
3A 5 x 20mm T - 250V ac - Glass - - - - -
RS Stock No. 563-649
BrandRS PRO
£0.167
Each (In a Pack of 10)
Units
3A 5 x 20mm F - 250V ac - Glass - - - - -
RS Stock No. 563-649A
BrandRS PRO
£0.055
Each (In a Pack of 100)
Units
3A 5 x 20mm F 5.2mm 250V ac 20mm Glass - - - - -
RS Stock No. 413-210
BrandRS PRO
£0.62
Each (In a Pack of 10)
Units
3A 6.3 x 32mm F - 500V ac - Ceramic - - - - 70-065-63
RS Stock No. 413-210A
BrandRS PRO
£0.50
Each (In a Pack of 100)
Units
3A 6.3 x 32mm F 6.35mm 500V ac 32mm Ceramic - - - - 70-065-63
RS Stock No. 668-5963
BrandRS PRO
£0.105
Each (In a Pack of 10)
Units
3A 5 x 20mm F - 250V ac - Glass - - - - -
RS Stock No. 668-6082
BrandRS PRO
£0.245
Each (In a Pack of 10)
Units
3A 6.3 x 32mm T - 250V ac - Glass - - - - -
RS Stock No. 668-6048
BrandRS PRO
£0.155
Each (In a Pack of 10)
Units
3A 6.3 x 32mm F - 250V ac - Glass - - - - -
RS Stock No. 177-8086
BrandRS PRO
£0.178
Each (In a Pack of 50)
Units
3A 5 x 20mm T - 250V ac - Glass - - - - GTE
RS Stock No. 177-8020
BrandRS PRO
£95.47
1 Box of 1000
Box(es)
3A 5 x 20mm T - 250V ac - Glass - - - - GTE
RS Stock No. 911-3405
BrandRS PRO
£0.172
Each (In a Pack of 10)
Units
3A 5 x 20mm T - 250V ac - Glass - - - - GTE
RS Stock No. 611-9043
BrandRS PRO
£0.42
Each (In a Pack of 10)
Units
3A 6.3 x 32mm F - 250V ac - Glass - - - - -
RS Stock No. 177-8114
BrandRS PRO
£0.149
Each (In a Pack of 50)
Units
3A 6.35 x 31.75mm F - 250V ac - Glass - - - - AFE
RS Stock No. 177-8131
BrandRS PRO
£0.116
Each (In a Pack of 50)
Units
3A 5 x 20mm F - 250V ac - Glass - - - - GFE
RS Stock No. 174-7957
BrandRS PRO
£0.105
Each (In a Box of 500)
Units
3A 6.3 x 25.4mm T - 240V ac - Ceramic - - - - UXT
RS Stock No. 177-8013
BrandRS PRO
£70.52
1 Box of 1000
Box(es)
3A 5 x 20mm F - 250V ac - Glass - - - - GFE
RS Stock No. 177-8009
BrandRS PRO
£0.13
Each (In a Box of 500)
Units
3A 6.35 x 31.75mm F - 250V ac - Glass - - - - AFE
RS Stock No. 412-560
Mfr. Part No.TDC180-3A
£0.265
Each (In a Pack of 10)
Units
3A 6.3 x 25mm F - 240V ac - Ceramic - - - - TDC180
RS Stock No. 412-560A
Mfr. Part No.TDC180-3A
£0.165
Each (In a Pack of 100)
Units
3A - F 6.3mm - - Ceramic - - - - -
RS Stock No. 169-9365
Mfr. Part No.TDC10-3A
£218.58
1 Bag of 1000
Bag(s)
3A 6.3 x 32mm F - 250V ac - Glass - - - - TDC10