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

55 of 999+
In Stock
TE Connectivity Thermal Circuit Breaker - W54 Single Pole 250V ac Voltage Rating, 10A Current Rating
  • RS stock no. 782-7969
  • Mfr. Part No. W54-XB1A4A10-10
Each
R 99.58(exc. VAT)
Temporarily out of stock
Eaton 32A NH Fuse, NH000, 690V ac
  • RS stock no. 181-8540
  • Mfr. Part No. 32NHG000B-690
1 Box of 3
R 271.71(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 16A Curve B, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS stock no. 211-2333
  • Mfr. Part No. M9F21116
Each
R 693.72(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 63A, 4 Pole, 30mA, Type B-EV, 400V ac
  • RS stock no. 248-3715
  • Mfr. Part No. A9Z51463
Each
R 25,697.93(exc. VAT)
In Stock
SES Sterling Earthing Strap Tinned Bronze 16 → 48mm Diameter, 2.5 → 10mm² Wire Range
  • RS stock no. 170-1962
  • Mfr. Part No. 06190003000
1 Bag of 16
R 1,530.23(exc. VAT)
In Stock
Eaton, xEnergy MCCB 3P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS stock no. 454-8089
  • Mfr. Part No. 259080 NZMB1-A125
Each
R 9,441.47(exc. VAT)
In Stock
Eaton 250mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 852-7027
  • Mfr. Part No. MDA-1-4-R
Each
R 100.57(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS stock no. 746-7719
  • Mfr. Part No. 2CDS252001R0104 S202-C10
Each
R 1,084.99(exc. VAT)
In Stock
Eaton 6A British Standard Fuse, A2, 660V ac, 73mm
  • RS stock no. 415-121
  • Mfr. Part No. TIA6
Each (In a Pack of 5)
R 206.826(exc. VAT)
In Stock
Siemens 32A F Cartridge Fuse, 10 x 38mm
  • RS stock no. 203-2029
  • Mfr. Part No. 3NW6012-1
Each (In a Pack of 20)
R 107.525(exc. VAT)
In Stock
Littelfuse 20A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 769-0091
  • Mfr. Part No. 0314020.HXP
Each (In a Pack of 5)
R 32.522(exc. VAT)
In Stock
Siemens Cover for use with SIRIUS 3RM1 Busbar
  • RS stock no. 783-9259
  • Mfr. Part No. 3RM1910-6AA
Each
R 39.50(exc. VAT)
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 25A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 209-5975
  • Mfr. Part No. 5SL4325-7
Each
R 2,166.16(exc. VAT)
In Stock
Siemens Alpha Blanking Strip
  • RS stock no. 209-7096
  • Mfr. Part No. 8GK9910-0KK01
Each
R 766.28(exc. VAT)
In Stock
Eaton 30A T Cartridge Fuse, 20 x 127mm
  • RS stock no. 851-1624
  • Mfr. Part No. FRS-R-30
Each
R 910.07(exc. VAT)
In Stock
Schneider Electric 440V ac Circuit Breaker Circuit Trip for use with Circuits
  • RS stock no. 130-543
  • Mfr. Part No. C16F44B160
Each
R 87,181.56(exc. VAT)
Temporarily out of stock
Rockwell Automation 1492-SP 1492-SPM MCB, 1P, 30A Curve B
  • RS stock no. 218-8717
  • Mfr. Part No. 1492-SPM1B300
Each (In a Pack of 2)
R 488.435(exc. VAT)
Limited stock
ABB IEC Range Busbar for use with DDA200, F200, S200
  • RS stock no. 250-4741
  • Mfr. Part No. 2CDL220001R1012
Each
R 216.64(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 3A, 125V ac/dc
  • RS stock no. 541-3417
  • Mfr. Part No. 0451003.MRL
Each (In a Pack of 10)
R 37.033(exc. VAT)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 250mA, 125V ac/dc
  • RS stock no. 541-3243
  • Mfr. Part No. 0251.250HAT1L
Each (In a Pack of 10)
R 27.834(exc. VAT)
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