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

50914 Products showing for Fuses & Circuit Breakers

5 of 999+
Eaton 20A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-355
  • Mfr. Part No. AAO20
Each (In a Pack of 5)
£8.742(exc. VAT)
Better World
ABB System Pro M Compact S200M MCB, 2P, 6A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-015
  • Mfr. Part No. 2CDS272001R0064 S202M-C6
Each
£57.47(exc. VAT)
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 3A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8596
  • Mfr. Part No. EZ9F16103
Each
£4.03(exc. VAT)
Better World
Siemens Sentron 5SY4 MCB, 1P, 2A Curve C, 250V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 622-0014
  • Mfr. Part No. 5SY4102-7
Each
£22.02(exc. VAT)
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 405-9141
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-10A
Each
£23.00(exc. VAT)
ABB 24 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1906
  • Mfr. Part No. 1SL1204A00 65P12X22
Each
£60.69(exc. VAT)
Better World
Schneider Electric 110V ac/dc Remote Tripping Device Circuit Trip for use with LR3D Series, LRD Series
  • RS Stock No. 744-6973
  • Mfr. Part No. LAD703F
Each
£71.70(exc. VAT)
Eaton 16A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-265
  • Mfr. Part No. C10G16 CYLINDRICAL FUSE 10 x 38 16A GG 500V AC
1 Pack of 10
£6.85(exc. VAT)
ABB System Pro M Compact S200M MCB, 1P, 6A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4138
  • Mfr. Part No. 2CDS271001R0064 S201M-C6
Each
£19.86(exc. VAT)
Europa EUC1P EUC MCB, 1P, 2A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6496
  • Mfr. Part No. EUC1P2C
Each
£6.92(exc. VAT)
Europa EUC3P EUC MCB, 3P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6591
  • Mfr. Part No. EUC3P32C
Each
£22.40(exc. VAT)
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 6A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6087
  • Mfr. Part No. A9P22606
Each
£44.60(exc. VAT)
Eaton PXF-A RCCB, 40A, 3+N Pole, 30mA, Type A, 400V ac
  • RS Stock No. 490-466
  • Mfr. Part No. 236776 PXF-40/4/003-A
Each
£44.32(exc. VAT)
Eaton 10A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-176
  • Mfr. Part No. C10G10 CYLINDRICAL FUSE 10 x 38 10A GG 500V AC
1 Pack of 10
£6.85(exc. VAT)
RS PRO PC Board Non Resettable Fuse 5A, 250V ac
  • RS Stock No. 911-3565
Each (In a Pack of 10)
£0.309(exc. VAT)
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9633
  • Mfr. Part No. 2CDS253001R0321 S203-D32
Each
£64.86(exc. VAT)
Eaton 125A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8484
  • Mfr. Part No. C22G125
1 Pack of 10
£39.66(exc. VAT)
Eaton 10A British Standard Fuse, A2, 660V ac, 73mm
  • RS Stock No. 415-137
  • Mfr. Part No. TIA10
1 Pack of 5
£42.07(exc. VAT)
Eaton 1A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-986
  • Mfr. Part No. TDC180-1A
1 Pack of 10
£5.82(exc. VAT)
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 25A Current Rating
  • RS Stock No. 406-9491
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-25A
Each
£23.00(exc. VAT)
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