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

46580 Products showing for Fuses & Circuit Breakers

6 / 999+
ABB System Pro M Compact S200L MCB, 1P, 10A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 183-3628
  • Mfr. Part No. 2CDS241701R0104
Each
MYR102.39
Eaton 160A Bolted Tag Fuse, LET, 150 V dc, 240V ac, 41mm
  • RS Stock No. 182-1425
  • Mfr. Part No. 160LET
Each (In a Box of 10)
MYR113.837
Bourns SMD Non Resettable Fuse 500mA, 50V dc
  • RS Stock No. 897-8989
  • Mfr. Part No. SF-0603S050-2
Each (In a Pack of 10)
MYR2.505
RS PRO 4A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2472
Each (In a Pack of 5)
MYR19.742
Better World
Siemens Sentron 5SY4 MCB, 1P, 25A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1262
  • Mfr. Part No. 5SY4125-7
Each
MYR147.32
Eaton 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9414
  • Mfr. Part No. S506-6.3-R
1 Bag of 1000
MYR870.21
Eaton 10A Bolted Tag Fuse, 1.2 kV ac, 660V dc, 124mm
  • RS Stock No. 181-8433
  • Mfr. Part No. TAC10
Each (In a Box of 10)
MYR216.564
Eaton 16A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 703-8689
  • Mfr. Part No. 16NHG01B
Each
MYR50.51
ABB RCBO, 32A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 225-6146
  • Mfr. Part No. 2CSR256040R1324 DS203NC C32 AC30
Each
MYR986.33
Eaton xEffect - FRCmM RCCB, 16A, 4 Pole, 100mA, Type A, 240/415V ac
  • RS Stock No. 123-240
  • Mfr. Part No. 170337 FRCMM-16/4/01-A
Each
MYR1,134.26
Littelfuse SMD Non Resettable Fuse 3A, 125V ac/dc
  • RS Stock No. 219-6119
  • Mfr. Part No. 0154003.DR
Each (In a Pack of 10)
MYR14.423
Eaton 200A Bolted Tag Fuse, B2, 550V ac, 111mm
  • RS Stock No. 182-1641
  • Mfr. Part No. TF200M315
Each
MYR666.71
Eaton 20A Rail Mount Fuse Holder, 1P, 690V ac
  • RS Stock No. 182-1764
  • Mfr. Part No. RS20P-GGN
Each
MYR212.15
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 10A Curve C, 400V AC
  • RS Stock No. 238-3365
  • Mfr. Part No. A9P22310
Each
MYR649.45
Littelfuse 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 542-1250
  • Mfr. Part No. 021806.3MXP
Each (In a Pack of 10)
MYR3.726
Schneider Electric TeSys Thermal Magnetic Circuit Breaker - GB2 1P + N Pole 250V ac Voltage Rating DIN Rail Mount, 2A
  • RS Stock No. 323-9009
  • Mfr. Part No. GB2CD07
Each
MYR294.33
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8653
  • Mfr. Part No. EZ9D16816
Each
MYR163.60
Eaton 16A Tag Fuse, 22 x 50mm, 500V
  • RS Stock No. 228-715
  • Mfr. Part No. 16D27Q
1 Pack of 5
MYR31.58
Siemens 25A Bottle Fuse Holder, 1P, 500V ac
  • RS Stock No. 202-7235
  • Mfr. Part No. 5SF1060
Each (In a Pack of 3)
MYR74.79
Eaton PC Board Non Resettable Fuse, Radial 1.6A, 250V ac
  • RS Stock No. 769-3416
  • Mfr. Part No. SS-5H-1-6A-BK
Each (In a Pack of 10)
MYR1.851
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