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

3 / 999+
In Stock
RS PRO 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6089
Each (In a Pack of 10)
MYR3.045
Temporarily out of stock
Contactum MCB, 3P, 63A Curve C, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9054
  • Mfr. Part No. CPB1063C3
Each
MYR113.74
In Stock
Littelfuse SMD Non Resettable Fuse 2A, 125V
  • RS Stock No. 787-4328
  • Mfr. Part No. 0449002.MR
Each (In a Pack of 5)
MYR10.83
In Stock
Eaton 315A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 703-8746
  • Mfr. Part No. 315NHG2B
Each
MYR115.55
In Stock
Eaton 160A British Standard Fuse, A4, 415V ac, 94mm
  • RS Stock No. 139-962
  • Mfr. Part No. DEO160
Each
MYR168.49
In Stock
Contactum MCB, 1P, 16A Curve B, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9030
  • Mfr. Part No. CPB1016B
Each
MYR32.20
In Stock
ABB System Pro M Compact S200M MCB, 1P, 16A Curve B, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-5995
  • Mfr. Part No. 2CDS271001R0165 S201M-B16
Each
MYR118.66
In Stock
Littelfuse 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 787-4120
  • Mfr. Part No. 0287015.PXCN
Each (In a Pack of 10)
MYR1.525
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 20A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3458
  • Mfr. Part No. A9F77120
Each
MYR230.13
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 10A Curve B, 230 V, 400 V AC, 10 kA Breaking Capacity
  • RS Stock No. 231-9660
  • Mfr. Part No. 2CDS251001R0105 S201 B 10A - 10 KA
1 Box of 1
MYR110.06
In Stock
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 20A Current Rating
  • RS Stock No. 210-2109
  • Mfr. Part No. 3120-N554-P7T1-W02D-20A
Each
MYR181.17
Last RS stock
Littelfuse SMD Non Resettable Fuse 1A, 63V dc
  • RS Stock No. 820-7105P
  • Mfr. Part No. 0438001.WR
Each (Supplied on a Reel)
MYR4.852
Temporarily out of stock
ABB F200 RCCB, 80A, 2 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 225-6106
  • Mfr. Part No. 2CSF202101R2800 F202 A-80/0.1
Each
MYR1,431.06
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 6A Curve C, 253V AC, 72V DC, 20 kA Breaking Capacity
  • RS Stock No. 225-5998
  • Mfr. Part No. 2CDS251103R0064
Each
MYR297.32
Temporarily out of stock
ABB RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 136-7800
  • Mfr. Part No. 2CSR275051R1064 DSE201 M C6 AC30 - N Blue
Each
MYR780.14
In Stock
Eaton 100A British Standard Fuse, A3, 500V ac, 73.5mm
  • RS Stock No. 418-984
  • Mfr. Part No. OSD100
Each
MYR117.65
In Stock
Eaton 80mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1739
  • Mfr. Part No. S506-80-R
Each (In a Pack of 10)
MYR4.919
In Stock
Better World
Schneider Electric Acti9 Acti9 iDT40K MCB, 1+N, 16A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 238-3412
  • Mfr. Part No. A9P71616
Each
MYR170.35
Temporarily out of stock
Eaton RCBO, 20A Current Rating, 2P Poles, 10mA Trip Sensitivity, Type A, Type C, FRBdM Range
  • RS Stock No. 121-002
  • Mfr. Part No. 168301 FRBDM-C20/2/001-G/A
Each
MYR1,150.83
In Stock
Eaton 160A NH Fuse, NH0, 500V ac
  • RS Stock No. 181-8535
  • Mfr. Part No. 160NHG0B
1 Box of 3
MYR109.72
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