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

4 / 999+
RS PRO 10A Slotted Tag Fuse, A1, 250 V dc, 415V ac, 44.5mm
  • RS Stock No. 221-3692
1 Bag of 5
MYR108.03
RS PRO SMD Non Resettable Fuse 100mA, 125V
  • RS Stock No. 182-4086P
Each (Supplied in a Box)
MYR4.296
ABB RCBO, 16A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5209
  • Mfr. Part No. 2CSR274101R1165
Each
MYR2,121.31
ETA REX12 Electronic Circuit breaker 4A 24V REX12-T, 1 channels , DIN Rail Mount
  • RS Stock No. 175-0366
  • Mfr. Part No. REX12-TA1-107-DC24V-4A
Each
MYR207.66
Eaton 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-377
  • Mfr. Part No. AAO32
Each (In a Pack of 5)
MYR40.758
ABB 125A Tag Fuse, 79 x 30 x 60mm, 500V
  • RS Stock No. 250-4398
  • Mfr. Part No. 1SCA022697R3070
1 Box of 3
MYR257.24
ABB System Pro M Compact S200 MCB, 1P, 100A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 231-9669
  • Mfr. Part No. 2CDS251001R0824 S201-C100 6kA
1 Box of 1
MYR366.07
Eaton 20A British Standard Fuse, A1, 440V ac, 44.5mm
  • RS Stock No. 414-667
  • Mfr. Part No. NIT20M32
Each (In a Pack of 5)
MYR48.148
Eaton 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 181-8888
  • Mfr. Part No. C14M20
Each
MYR14.01
Better World
Siemens SENTRON 5SY5 MCB, 2P, 6A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-2356
  • Mfr. Part No. 5SY5206-7
Each
MYR660.43
ABB F200 RCCB, 40A, 4 Pole, 30mA, Type AC
  • RS Stock No. 537-7428
  • Mfr. Part No. 2CSF204001R1400 F204 AC-40/0,03
Each
MYR1,298.73
TE Connectivity Thermal Circuit Breaker - W28 SP Pole 32 V dc, 250 V ac Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 167-5699
  • Mfr. Part No. W28-XQ1A-15
Each
MYR22.58
Eaton xPole MCB, 1+N, 16A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1076
  • Mfr. Part No. 264746 PLG4-C16/1N
Each
MYR66.22
Better World
Siemens Sentron 5SY4 MCB, 1P, 10A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 383-2024
  • Mfr. Part No. 5SY4110-7
Each
MYR123.32
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 231-9330
  • Mfr. Part No. 1SDA100354R1 XT5N 400 EkipDip LS/I 400
Each
MYR5,349.13
Eaton 110 → 200A Ferrule Fuse Block, 600V
  • RS Stock No. 182-1341
  • Mfr. Part No. JM60200-3CR
Each
MYR4,587.99
Phoenix Contact Thermal Circuit Breaker - TCP 4A Single Pole 65 V dc, 250V ac Voltage Rating, 4A Current Rating
  • RS Stock No. 801-6909
  • Mfr. Part No. 0712259
Each
MYR86.79
ABB S201L MCB, 1P, 16A Curve C, 230/400V AC, 6 kA Breaking Capacity
  • RS Stock No. 203-770
  • Mfr. Part No. 2CDS241701R0164
Each
MYR93.06
Better World
Schneider Electric Multi 9 MCB, 1P, 10A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9119
  • Mfr. Part No. M9F22110
Each
MYR168.37
Contactum MCB, 3P, 32A Curve D, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9045
  • Mfr. Part No. CPB1032D3
Each
MYR94.69
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