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

46578 Products showing for Fuses & Circuit Breakers

197 / 999+
In Stock
ABB RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 183-3703
  • Mfr. Part No. 2CSR245041R1254
Each
MYR645.87
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3525
  • Mfr. Part No. 3VA1463-5FF42-0AA0
Each
MYR17,986.87
In Stock
Siemens 160A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2033
  • Mfr. Part No. 3NA6136
Each (In a Pack of 3)
MYR114.347
In Stock
Siemens 35A NH Fuse, NH2, 440 - 500V ac/dc
  • RS Stock No. 269-8318
  • Mfr. Part No. 3NA7214
Each (In a Pack of 3)
MYR133.75
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-355
  • Mfr. Part No. 3VA6440-7KL41-2AA0
Each
MYR36,501.70
Temporarily out of stock
Hager NGN MCB, 2P, 40A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4766
  • Mfr. Part No. NGN240
Each
MYR855.18
In Stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 1P, 100A Curve C
  • RS Stock No. 219-8291
  • Mfr. Part No. A9N18447
Each
MYR690.22
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-4132
  • Mfr. Part No. 1SDA072242R1
Each
MYR28,900.11
Temporarily out of stock
Better World
Siemens Sentron for use with 3VA1 And 3VA20 Up To 3VA25
  • RS Stock No. 226-2844
  • Mfr. Part No. 3VA9988-0BL31
Each
MYR683.42
Temporarily out of stock
ABB RD2 RCD, 63A, 230V
  • RS Stock No. 231-9917
  • Mfr. Part No. 2CSM142120R1201 RD 2
1 Box of 1
MYR2,136.61
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 4 channels
  • RS Stock No. 259-3783
  • Mfr. Part No. 1SDA071789R1
Each
MYR114,578.14
Temporarily out of stock
Eaton xPole MCB, 1P, 63A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4330
  • Mfr. Part No. 242212 PLSM-C63-MW
Each
MYR143.70
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - CPP Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0182
  • Mfr. Part No. CPP11-52-10.0A-OC-V
Each
MYR124.55
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3728
  • Mfr. Part No. 3VA1125-5ED32-0AA0
Each
MYR1,811.69
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2778
  • Mfr. Part No. 2907877
Each
MYR442.80
In Stock
Littelfuse 60A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 219-3592
  • Mfr. Part No. 0299060.TXN
Each (In a Pack of 10)
MYR10.095
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 4A Current Rating
  • RS Stock No. 217-6370
  • Mfr. Part No. 2800872
Each
MYR471.41
Temporarily out of stock
Better World
Schneider Electric Acti 9 C60-PV MCB, 2P, 5A Curve C, 800V DC, 3 kA Breaking Capacity
  • RS Stock No. 776-3632
  • Mfr. Part No. A9N61656
Each
MYR1,861.23
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100 DC
  • RS Stock No. 260-9392
  • Mfr. Part No. C104TM080D
Each
MYR1,704.72
Temporarily out of stock
ABB Surge Arrester, 20kA
  • RS Stock No. 246-2249
  • Mfr. Part No. 2CCF606002R0001
Each
MYR2,156.73
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