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

34 of 999+
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 1P, 6A Curve C, 10 kA Breaking Capacity
  • RS stock no. 214-2057
  • Mfr. Part No. M9F11106
Each
R 728.61(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 60A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS stock no. 203-829
  • Mfr. Part No. 2CDS271061R0587
Each
R 3,189.64(exc. VAT)
In Stock
Littelfuse 2A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 738-3153
  • Mfr. Part No. 0KLK002.T
Each
R 615.76(exc. VAT)
In Stock
Mersen 16A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 247-2981
  • Mfr. Part No. Z302794
1 Box of 10
R 1,803.07(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 13A Curve D, 240V AC
  • RS stock no. 256-6770
  • Mfr. Part No. M9F23213
Each
R 1,870.25(exc. VAT)
In Stock
RS PRO 1.1A Resettable Fuse, 33V dc
  • RS stock no. 279-6755
Each (In a Pack of 10)
R 8.663(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 200mA, 250V ac
  • RS stock no. 767-5018
Each (In a Pack of 10)
R 8.30(exc. VAT)
In Stock
RS PRO F, T Fuse Kit
  • RS stock no. 893-8543
Each
R 3,490.62(exc. VAT)
Temporarily out of stock
Eaton 32A Rail Mount Fuse Holder, 1P, 550V ac
  • RS stock no. 182-1397
  • Mfr. Part No. 32NNSFBS
Each (In a Box of 10)
R 296.74(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 5A Curve C, 10 kA Breaking Capacity
  • RS stock no. 219-9122
  • Mfr. Part No. M9F22205
Each
R 2,194.72(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 63A Curve B, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-3379
  • Mfr. Part No. A9F76163
Each
R 477.15(exc. VAT)
In Stock
SIBA 25A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 314-4838
  • Mfr. Part No. 50-179-06/25A
Each (In a Pack of 5)
R 214.856(exc. VAT)
In Stock
Eaton 4A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 848-3917
  • Mfr. Part No. KTK-R-4
Each
R 732.01(exc. VAT)
In Stock
Eaton 20A British Standard Fuse, F1, 550V ac
  • RS stock no. 413-513
  • Mfr. Part No. NSD20
Each (In a Pack of 5)
R 126.726(exc. VAT)
Last RS stock
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-7821
  • Mfr. Part No. W57-XB1A7A10-5
Each
R 89.98(exc. VAT)
In Stock
Mersen 32A Slow-Blow Ceramic Cartridge Fuse, 13 x 29mm
  • RS stock no. 209-6431
  • Mfr. Part No. C1036980 / BMD42V32
Each (In a Pack of 10)
R 120.629(exc. VAT)
In Stock
Wickmann 35A Green Blade Car Fuse, 32V dc
  • RS stock no. 174-0720
  • Mfr. Part No. 0287035.PXCN
Each (In a Pack of 50)
R 6.074(exc. VAT)
In Stock
Littelfuse 80A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS stock no. 226-0872
  • Mfr. Part No. 157.5701.5801
Each
R 149.70(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
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)
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