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

9 / 999+
Limited stock
Eaton 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1341
  • Mfr. Part No. S506-2-R
Each (In a Pack of 10)
MYR1.225
In Stock
Better World
Schneider Electric Acti 9 MCB, 1P, 6A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6144
  • Mfr. Part No. A9PA4606
Each
MYR765.55
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 20A Curve D, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8172
  • Mfr. Part No. 2CDS272001R0201 S202M-D20
Each
MYR298.99
In Stock
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1177
  • Mfr. Part No. S500-2-R
Each (In a Pack of 10)
MYR1.723
In Stock
RS PRO 4A Pink Blade Car Fuse, 32V dc
  • RS Stock No. 563-716
Each (In a Pack of 10)
MYR3.339
In Stock
Eaton 25A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8759
  • Mfr. Part No. STD25
Each
MYR24.44
In Stock
Littelfuse SMD Non Resettable Fuse 4A, 125V ac/dc
  • RS Stock No. 541-3423
  • Mfr. Part No. 0451004.MRL
Each (In a Pack of 10)
MYR4.495
In Stock
ABB RCCB, 40A, 4 Pole
  • RS Stock No. 189-5642
  • Mfr. Part No. 2CSF204023R1400 F204 AC-40/0,03-L
Each
MYR785.28
In Stock
ETA Thermal Circuit Breaker - 1170 Single Pole 28V dc Voltage Rating, 25A Current Rating
  • RS Stock No. 854-481
  • Mfr. Part No. 1170-21-25A
Each
MYR71.83
In Stock
Eaton 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1133
  • Mfr. Part No. S500-5-R
Each (In a Pack of 10)
MYR1.557
In Stock
Phoenix Contact CLIPLINE Thermal Circuit Breaker - UT 6-TMC Single Pole 250V Voltage Rating DIN Rail Mount, 5A Current
  • RS Stock No. 684-3591
  • Mfr. Part No. 0916607
Each
MYR103.06
Temporarily out of stock
Eaton 63A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8565
  • Mfr. Part No. 63NZ02
Each (In a Box of 10)
MYR21.841
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 4A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6086
  • Mfr. Part No. A9P22604
Each
MYR317.03
In Stock
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3024
  • Mfr. Part No. BK-GMA-2-R
Each
MYR2.60
In Stock
Eaton 10A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-176
  • Mfr. Part No. C10G10 CYLINDRICAL FUSE 10 x 38 10A GG 500V AC
1 Pack of 10
MYR47.67
In Stock
Eaton FAZ-NA MCB, 1P, 1.5A Curve C
  • RS Stock No. 230-1304
  • Mfr. Part No. 102079 FAZ-C1,5/1-NA
Each
MYR229.71
In Stock
Eaton 32A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-178
  • Mfr. Part No. C10G32 CYLINDRICAL FUSE 10 x 38 32A GG 400V AC
1 Pack of 10
MYR47.67
Temporarily out of stock
RS PRO 20A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 521-2595
Each (In a Pack of 5)
MYR26.592
In Stock
ABB System Pro M Compact S200M MCB, 1P, 6A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4138
  • Mfr. Part No. 2CDS271001R0064 S201M-C6
Each
MYR127.76
In Stock
Eaton 50A D02 Bottle Fuse, E18 Thread Size, gG, 400V ac
  • RS Stock No. 181-8566
  • Mfr. Part No. 50NZ02
Each (In a Box of 10)
MYR18.224
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