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

50958 Products showing for Fuses & Circuit Breakers

142 of 999+
Siemens 200A NH Fuse, NH1, 500V ac
  • RS Stock No. 396-083
  • Mfr. Part No. 3NA3140
Each (In a Pack of 3)
£12.087
Better World
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9207
  • Mfr. Part No. A9D31810
Each
£148.47
Allen Bradley 1492 1492-SPM MCB Mini Circuit Breaker, 1P, 1A Curve B, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 125-1416
  • Mfr. Part No. 1492-SPM1B010
Each
£19.92
TE Connectivity Thermal Magnetic Circuit Breakers - Potter & Brumfield W28 Single Pole 250V ac Voltage Rating Panel
  • RS Stock No. 240-8957
  • Mfr. Part No. 3-1393250-4
Each
£3.48
Better World
Siemens SENTRON 5SL6 MCB, 2P, 13A Curve B, 400V AC, 72V DC
  • RS Stock No. 212-9002
  • Mfr. Part No. 5SL6213-6
Each
£44.18
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 2A Current Rating
  • RS Stock No. 333-243
  • Mfr. Part No. 201-2A
Each
£38.45
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 40A Curve B, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2346
  • Mfr. Part No. M9F21340
Each
£131.78
Eaton 200A British Standard Fuse, B2, 415V ac, 111mm
  • RS Stock No. 156-8715
  • Mfr. Part No. DD200M250
Each
£34.41
Eaton MEMShield MCB, 1P, 6A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3020
  • Mfr. Part No. EMBH106 EMBH106
Each
£25.31
Schneider Electric Acti9 Acti9 iC60 MCB, 1P, 1A Curve C, 500V AC, 72V DC, 230 V Breaking Capacity
  • RS Stock No. 479-575
  • Mfr. Part No. A9F94101
Each
£39.03
Bourns Surface Mount Fuse 1A, 65V dc
  • RS Stock No. 245-9242
  • Mfr. Part No. SF-1206SA100M-2
Each (On a Tape of 10)
£0.616
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 16A Curve B, 240V AC, 10000 A Breaking Capacity
  • RS Stock No. 335-288
  • Mfr. Part No. SE10B116
Each
£23.34
Littelfuse 20A Yellow Blade Car Fuse, 32V dc
  • RS Stock No. 787-4151P
  • Mfr. Part No. 0297020.WXNV
Each (Supplied in a Bag)
£0.211
SIBA 50A NH Fuse, NH000, 690V
  • RS Stock No. 893-8559
  • Mfr. Part No. 20-477-08/50A
Each (In a Pack of 3)
£15.633
SIBA 16A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3264
  • Mfr. Part No. 70-007-33/16A
Each (In a Pack of 10)
£0.522
Eaton 160A NH Fuse, NH1, 500V ac
  • RS Stock No. 181-8777
  • Mfr. Part No. 160NHG1B
Each
£9.39
Socomec 2A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5262
  • Mfr. Part No. 60120002
Each (In a Pack of 10)
£0.869
Allen Bradley 1492 1492-SPM MCB, 1P, 20A Curve B, 277V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 125-1425
  • Mfr. Part No. 1492-SPM1B200
Each
£17.53
Better World
Schneider Electric Surge Protector, 24 → 250V dc, Clip-On Mount
  • RS Stock No. 817-5323
  • Mfr. Part No. LAD4DDL
Each
£17.93
Eaton 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 852-7294
  • Mfr. Part No. S505-1-6-R
Each (In a Pack of 5)
£1.428
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