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

50989 Products showing for Fuses & Circuit Breakers

4 of 999+
In Stock
Siemens ALPHA Busbar
  • RS Stock No. 226-0831
  • Mfr. Part No. 8GK9733-0KK10
Each
€44.20(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W28 Single Pole 32 V dc, 250V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 782-0911
  • Mfr. Part No. W28-XQ1A-3
Each
€4.16(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 6A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7706
  • Mfr. Part No. 2CDS252001R0064 S202-C6
Each
€53.56(exc. VAT)
In Stock
Siemens ALPHA Distribution Board, 8 Way
  • RS Stock No. 211-6074
  • Mfr. Part No. 8GB1371-1
Each
€56.53(exc. VAT)
In Stock
Littelfuse 3A Purple Blade Car Fuse, 32V dc
  • RS Stock No. 787-4142
  • Mfr. Part No. 0287003.PXCN
Each (In a Pack of 10)
€0.271(exc. VAT)
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 10A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8593
  • Mfr. Part No. EZ9F16110
Each
€6.44(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 40A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3354
  • Mfr. Part No. A9F54240
Each
€65.50(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W31 Single Pole 50 V dc, 240V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 782-0937
  • Mfr. Part No. W31-X2M1G-20
Each
€41.53(exc. VAT)
In Stock
Phoenix Contact Busbar
  • RS Stock No. 290-1258
  • Mfr. Part No. 0402174
Each
€12.37(exc. VAT)
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V Voltage Rating DIN Rail Mount, 40A Current
  • RS Stock No. 272-836
  • Mfr. Part No. GV3L40
Each
€204.41(exc. VAT)
In Stock
ABB RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 201-6933
  • Mfr. Part No. 2CSR255080R1104 DS201 C10 AC30
Each
€161.74(exc. VAT)
In Stock
RS PRO 30A Rail Mount Fuse Holder for 5 x 20mm Fuse, 1P, 500V
  • RS Stock No. 242-0497
1 Bag of 10
€36.50(exc. VAT)
Temporarily out of stock
RS PRO 5A Inline Fuse Holder for 5x20mm Fuse, 250V
  • RS Stock No. 284-6487
Each (In a Pack of 10)
€2.253(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 1658, 25A Current Rating
  • RS Stock No. 288-4022
  • Mfr. Part No. 1658-G21-02-P10-25A
Each
€6.25(exc. VAT)
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)
€0.269(exc. VAT)
In Stock
Contactum MCB, 3P, 63A Curve D, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9055
  • Mfr. Part No. CPB1063D3
Each
€21.16(exc. VAT)
In Stock
RS PRO 32A aR Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-066
1 Pack of 10
€178.39(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 40A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3153
  • Mfr. Part No. 5SY4140-7
Each
€24.82(exc. VAT)
In Stock
Eaton 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8386
  • Mfr. Part No. C10G10
Each (In a Pack of 10)
€1.321(exc. VAT)
In 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)
€0.212(exc. VAT)
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