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

2254 / 999+
Bourns 3.3A Resettable Fuse, 6V
  • RS Stock No. 245-9165
  • Mfr. Part No. MF-LSMF330X-2
Each (On a Reel of 3000)
MYR1.904
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-5057
  • Mfr. Part No. 3VA1196-4EE42-0AA0
Each
MYR2,201.21
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-237
  • Mfr. Part No. 3VA6610-6JP42-0AA0
Each
MYR54,861.18
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-4053
  • Mfr. Part No. 1SDA072135R1
Each
MYR17,792.76
Schneider Electric, ComPacT MCCB 3P 220A, Fixed Mount
  • RS Stock No. 260-7969
  • Mfr. Part No. C25R36M220
Each
MYR18,900.90
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4576
  • Mfr. Part No. 1SDA072826R1
Each
MYR40,750.98
Siemens 200A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6929
  • Mfr. Part No. 3NA7240-6
Each (In a Pack of 3)
MYR365.707
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3190
  • Mfr. Part No. 1SDA071055R1
Each
MYR49,251.10
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7474
  • Mfr. Part No. C10V45E100
Each
MYR16,091.60
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9706
  • Mfr. Part No. 3VA11123GE460AA0
Each
MYR4,346.39
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4167
  • Mfr. Part No. 1SDA072283R1
Each
MYR35,776.47
Better World
Siemens SENTRON 5SY7 MCB, 3+N, 6A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 213-1098
  • Mfr. Part No. 5SY7606-7
Each
MYR1,072.72
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3888
  • Mfr. Part No. 3VA2063-8HL36-0AA0
Each
MYR4,969.65
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4739
  • Mfr. Part No. 3VA2163-7HL46-0AA0
Each
MYR5,687.13
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3851
  • Mfr. Part No. 1SDA071863R1
Each
MYR143,515.12
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Touch LSIG, 4 / f channels
  • RS Stock No. 259-3921
  • Mfr. Part No. 1SDA071957R1
Each
MYR148,589.17
Siemens SENTRON Conversion Kit for use with 3VA1 250
  • RS Stock No. 210-9324
  • Mfr. Part No. 3VA9213-0KP10
Each
MYR703.08
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 221-5624
  • Mfr. Part No. 3-128-233
1 Box of 10
MYR737.01
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4530
  • Mfr. Part No. 1SDA072767R1
Each
MYR40,846.71
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4170
  • Mfr. Part No. 1SDA072285R1
Each
MYR33,081.86
1
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