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

46578 Products showing for Fuses & Circuit Breakers

167 / 999+
In Stock
RS PRO 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8051
Each (In a Box of 500)
MYR1.837
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7860
  • Mfr. Part No. C25B34V160
Each
MYR15,210.81
In Stock
Eaton 25A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8437
  • Mfr. Part No. C14G25
Each (In a Pack of 10)
MYR9.722
In Stock
Better World
Siemens 5SV4312 RCCB, 25A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 231-8387
  • Mfr. Part No. 5SV4312-0
Each
MYR552.71
Temporarily out of stock
Better World
Schneider Electric Vertical Distribution Busbar Trunking, 2.5m, 630A, Canalis KS Series
  • RS Stock No. 211-0484
  • Mfr. Part No. KSA630EV4254
Each
MYR17,355.90
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-518
  • Mfr. Part No. 3VA6140-7JT41-2AA0
Each
MYR14,665.86
Temporarily out of stock
Eaton Eaton Moeller NZM Undervoltage Release for use with PXR20(25) NZM2(-4), PXR20(25) NZM3(-4)
  • RS Stock No. 248-967
  • Mfr. Part No. 189732 NZM2/3-XUHIV2A24AC
Each
MYR1,309.06
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 250A, Fixed Mount
  • RS Stock No. 254-6361
  • Mfr. Part No. C25N3TM250
Each
MYR8,204.13
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 2P, 1A Curve D, 400V AC, 440V DC, 6 kA Breaking Capacity
  • RS Stock No. 186-3448
  • Mfr. Part No. 2CDS252001R0011 S202-D1
Each
MYR317.11
In Stock
Siemens SENTRON 5SJ4 MCB, 3P, 6A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 213-1030
  • Mfr. Part No. 5SJ4306-7HG42
Each
MYR1,330.13
Temporarily out of stock
ABB S-ARC1 M MCB, 1+N, 20A Curve C, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 175-9940
  • Mfr. Part No. 2CSA275901R9204 S-ARC1 M C20
Each
MYR1,243.04
Currently unavailable
Schurter Circuit Breaker Switch - TA45 2 Pole 120V ac Voltage Rating Panel Mount, 5.5A Current Rating
  • RS Stock No. 868-9064
  • Mfr. Part No. 4430.0479
Each
MYR161.42
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 3 channels
  • RS Stock No. 259-3363
  • Mfr. Part No. 1SDA071278R1
Each
MYR228,505.60
Temporarily out of stock
Siemens 400V (Volts) Remote Switch Circuit Trip for use with Remote Control Switch
  • RS Stock No. 613-371
  • Mfr. Part No. 5TT4111-1
Each
MYR264.49
In Stock
Schneider Electric Acti9 iID RCCB, 63A, 2 Pole, 30mA, Type B-SI, 230V ac
  • RS Stock No. 655-448
  • Mfr. Part No. A9Z61263
Each
MYR14,758.61
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 20A Curve C, 400V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7725
  • Mfr. Part No. 2CDS252001R0204 S202-C20
Each
MYR283.41
In Stock
RS PRO 100mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 240-8283
Each (In a Pack of 10)
MYR3.741
In Stock
Better World
Schneider Electric RCD, 6A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8640
  • Mfr. Part No. EZ9D16806
Each
MYR163.60
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 2A Curve C, 253V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9651
  • Mfr. Part No. 2CDS211001R0024 SH201-C 2
1 Box of 1
MYR101.99
Currently unavailable
Bourns 200A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4144
  • Mfr. Part No. PF-FB2-200
Each (In a Box of 10)
MYR502.702
1
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