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

39 of 999+
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 6A Curve B, 400V AC, 60V DC, 6 kA Breaking Capacity
  • RS stock no. 539-8138
  • Mfr. Part No. 2CDS211001R0065 SH201-B6
Each
R 377.02(exc. VAT)
In Stock
Eaton 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 171-6768
  • Mfr. Part No. S505H-6.3-R
Each (In a Pack of 5)
R 12.08(exc. VAT)
In Stock
RS PRO 32A Cartridge Fuse, 13 x 29mm
  • RS stock no. 413-850
Each (In a Pack of 10)
R 43.302(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
Lovato ModuLo P2MB MCB, 4P, 100A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS stock no. 825-6179
  • Mfr. Part No. P2MB4PC100
Each
R 5,993.61(exc. VAT)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 2A, 125V ac/dc
  • RS stock no. 541-3170
  • Mfr. Part No. 0473002.HAT1L
Each (In a Pack of 10)
R 38.076(exc. VAT)
In Stock
Schneider Electric RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS stock no. 212-021
  • Mfr. Part No. R9D01606
Each
R 1,698.75(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS stock no. 776-2821
  • Mfr. Part No. A9XPE110
Each
R 140.83(exc. VAT)
In Stock
ABB 200 → 240V (Volts) Shunt Trip Shunt trip
  • RS stock no. 259-5990
  • Mfr. Part No. 1SAM201910R1003
Each
R 1,565.67(exc. VAT)
In Stock
Schneider Electric Multi 9 C60H-DC MCB, 2P, 50A Curve C, 500V DC, 15 kA Breaking Capacity
  • RS stock no. 211-2472
  • Mfr. Part No. M9U21250
Each
R 2,667.35(exc. VAT)
In Stock
Eaton 3A F Glass Cartridge Fuse, 6.4 x 15.9mm
  • RS stock no. 851-1501
  • Mfr. Part No. AGA-3
Each
R 71.81(exc. VAT)
In Stock
Better World
ABB, Tmax XT MCCB 4P 63A, Fixed Mount
  • RS stock no. 236-7465
  • Mfr. Part No. 1SDA067733R1 XT2N 160 TMG 63A FF
Each
R 8,091.82(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 16A Curve D, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9664
  • Mfr. Part No. A9F75216
Each
R 1,041.69(exc. VAT)
In Stock
Better World
Schneider Electric 2P Switch Disconnector Circuit Trip for use with Acti 9 Isobar A type Distribution Boards
  • RS stock no. 806-7307
  • Mfr. Part No. SEA91252
Each
R 1,059.47(exc. VAT)
In Stock
Eaton 315A Centred Tag Fuse, NH2, 500V ac
  • RS stock no. 703-8746P
  • Mfr. Part No. 315NHG2B
Each (Supplied in a Box)
R 443.74(exc. VAT)
Temporarily out of stock
Better World
ABB, XT2S MCCB 3P 120A, Fixed Mount
  • RS stock no. 236-7491
  • Mfr. Part No. 1SDA067765R1 XT2S 160 MA 20 FF
Each
R 7,093.23(exc. VAT)
In Stock
Mersen 1A Ceramic Cartridge Fuse, 8 x 32mm
  • RS stock no. 304-1026
  • Mfr. Part No. C218709
Each (In a Pack of 10)
R 37.175(exc. VAT)
In Stock
RS PRO 10A FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 420-145
Each (In a Pack of 10)
R 40.802(exc. VAT)
In Stock
Eaton 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1521
Each (In a Pack of 10)
R 4.181(exc. VAT)
In Stock
Eaton 20A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 852-7055
  • Mfr. Part No. MDA-20-R
Each
R 31.86(exc. VAT)
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