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

26 of 999+
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 6A Curve C, 230V AC
  • RS stock no. 238-3410
  • Mfr. Part No. A9P71606
Each
R 797.80(exc. VAT)
In Stock
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS stock no. 563-447
Each (In a Pack of 10)
R 14.122(exc. VAT)
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 8A 24V PTCB, 1 channels , DIN Rail Mount
  • RS stock no. 207-2796
  • Mfr. Part No. 2908262
Each
R 1,216.08(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 2P, 6A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 196-3628
  • Mfr. Part No. 5SY6206-7
Each
R 1,188.07(exc. VAT)
In Stock
Eaton 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 412-324
  • Mfr. Part No. TDC10-10A
Each (In a Pack of 10)
R 14.739(exc. VAT)
In Stock
Contactum MCB, 1P, 10A Curve C, 250V AC, 10 kA Breaking Capacity
  • RS stock no. 184-9028
  • Mfr. Part No. CPB1010C
Each
R 138.77(exc. VAT)
Temporarily out of stock
Legrand DX3 RCD, 32A, 3+N Pole, 30mA, Type AC
  • RS stock no. 731-9972
  • Mfr. Part No. 4 111 89
Each
R 13,949.34(exc. VAT)
In Stock
Eaton 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1515
  • Mfr. Part No. S505-2-R
Each (In a Pack of 10)
R 5.047(exc. VAT)
In Stock
ABB Earth & Neutral Terminal Bar for use with MCB
  • RS stock no. 232-0026
  • Mfr. Part No. GJI2320131R0001 SZ-KLB 8
1 Box of 1
R 193.56(exc. VAT)
In Stock
Littelfuse PCB Mount Fuse Holder for ATO Fuse, 80V dc
  • RS stock no. 787-4353
  • Mfr. Part No. 178.6164.0001
Each
R 86.86(exc. VAT)
In Stock
Eaton xEffect MCB, 1P, 10A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS stock no. 624-0333
  • Mfr. Part No. 278557 FAZ-C10/1
Each
R 590.34(exc. VAT)
In Stock
Allen Bradley 1492-SP 1492-SP MCB, 1+N, 4A Curve B, 10 kA Breaking Capacity
  • RS stock no. 218-8699
  • Mfr. Part No. 1492-SPM1B040-N
Each
R 908.97(exc. VAT)
In Stock
ETI 63A Bottle Fuse Holder, 1P, 500V ac
  • RS stock no. 289-8922
  • Mfr. Part No. 2323008
Each
R 257.95(exc. VAT)
In Stock
Eaton 120A British Standard Fuse, FEE, 690V, 70mm
  • RS stock no. 156-9027
  • Mfr. Part No. 120FEE
Each
R 1,356.28(exc. VAT)
In Stock
Schurter 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 269-3788
  • Mfr. Part No. 0034.1525
Each
R 6.00(exc. VAT)
Currently unavailable
Finder 1 Phase Surge Arrester, 40kA
  • RS stock no. 223-7774
  • Mfr. Part No. 7P.27.8.275.0020
Each
R 1,363.96(exc. VAT)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 250mA, 125V ac/dc
  • RS stock no. 820-7142
  • Mfr. Part No. 0440.250WR
Each (In a Pack of 100)
R 13.509(exc. VAT)
In Stock
Eaton 40A British Standard Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS stock no. 156-8939
  • Mfr. Part No. 40FE
Each
R 460.23(exc. VAT)
In Stock
Bourns 0.75A Resettable Fuse, 60V
  • RS stock no. 691-7585P
  • Mfr. Part No. MF-SM075/60-2
Each (Supplied on a Reel)
R 7.674(exc. VAT)
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS stock no. 246-5128
  • Mfr. Part No. 3RV1915-1AB
Each
R 211.15(exc. VAT)
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