Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses
Fuses - PCB
Fuses - PCB

50687 Products showing for Fuses & Circuit Breakers

31 of 999+
In Stock
Allen Bradley 1492 1492-SPM MCB, 1P, 2A Curve C, 277V AC, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 125-1452
  • Mfr. Part No. 1492-SPM1C020
Each
R 521.85(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS stock no. 746-7873
  • Mfr. Part No. 2CDS252001R0401 S202-D40
Each
R 1,206.33(exc. VAT)
In Stock
RS PRO 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 668-5979
Each (In a Pack of 10)
R 7.554(exc. VAT)
In Stock
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 610-9838
Each (In a Pack of 10)
R 11.273(exc. VAT)
In Stock
RS PRO 1.25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 769-6330
Each (In a Pack of 10)
R 20.871(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric iID RCD, 40A, 100mA
  • RS stock no. 776-3691
  • Mfr. Part No. A9R12240
Each
R 5,115.55(exc. VAT)
In Stock
Mersen 40A British Standard Fuse, 17 x 49mm, 690V, 61 → 65.5mm
  • RS stock no. 238-3997
  • Mfr. Part No. C220963
Each
R 884.14(exc. VAT)
In Stock
Eaton 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1256
  • Mfr. Part No. S500-400-R
Each (In a Pack of 10)
R 7.523(exc. VAT)
In Stock
RS PRO 4A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 247-3961
Each (In a Pack of 10)
R 24.303(exc. VAT)
In Stock
RS PRO 3A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 413-210
Each (In a Pack of 10)
R 24.303(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS stock no. 767-5049
Each (In a Pack of 10)
R 5.855(exc. VAT)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 5A, 125V ac/dc
  • RS stock no. 541-3300
  • Mfr. Part No. 0251005.NRT1L
Each (In a Pack of 10)
R 26.697(exc. VAT)
In Stock
Bulgin 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 359-3381
  • Mfr. Part No. FX0454/S
Each (In a Pack of 5)
R 166.34(exc. VAT)
In Stock
Littelfuse 100A Yellow Bolt Down Car Fuse, 32V dc
  • RS stock no. 787-4397P
  • Mfr. Part No. 0298100.ZXEH
Each (Supplied in a Bag)
R 118.24(exc. VAT)
Temporarily out of stock
Eaton 30A Panel Mount Fuse Holder for 10 x 38mm Fuse, 1P, 600V ac
  • RS stock no. 852-7556
  • Mfr. Part No. HPG
Each
R 349.33(exc. VAT)
In Stock
Wickmann 60A Bolt Down Car Fuse, 32V dc
  • RS stock no. 174-0663
  • Mfr. Part No. 0298060.ZXB
1 Pack of 1
R 183.67(exc. VAT)
In Stock
SIBA 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 783-3305
  • Mfr. Part No. 70-007-65/1.6A
Each (In a Pack of 10)
R 13.376(exc. VAT)
Temporarily out of stock
Siemens 160A Centred Tag Fuse, NH1, 690V ac
  • RS stock no. 396-382
  • Mfr. Part No. 3NE1224-0
Each (In a Pack of 3)
R 5,216.707(exc. VAT)
In Stock
Mersen 3A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 136-0595
  • Mfr. Part No. HP10M3
Each
R 185.65(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 10A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3161
  • Mfr. Part No. A9F53110
Each
R 638.09(exc. VAT)
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