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

732 of 999+
Schneider Electric, Powerpact Circuit breaker 1P 50A, Breaking Capacity 25 kA, Clip-On
  • RS Stock No. 444-272
  • Mfr. Part No. BJL16050
Each
£260.90
Eaton 63A Rail Mount Fuse Holder
  • RS Stock No. 418-653
  • Mfr. Part No. RS63LOCK
Each (In a Pack of 3)
£13.273
Mersen 1.25kA size 33 FF Square Body Fuse, aR, 700V
  • RS Stock No. 448-3257
  • Mfr. Part No. D300084
Each
£271.34
Eaton 25A Cartridge Fuses, 22.2 x 58mm
  • RS Stock No. 228-917
  • Mfr. Part No. C22G25S
1 Pack of 10
£81.03
ABB Cover for use with SACE Tmax XT
  • RS Stock No. 192-0925
  • Mfr. Part No. 1SDA066664R1
Each
£31.57
Eaton xEffect FAZ MCB, 1P, 6A Curve C, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 247-128
  • Mfr. Part No. 102124 FAZ-C6/1-RT
Each
£55.87
Schneider Electric Busbar Cover, PrismaSeT P Series
  • RS Stock No. 119-633
  • Mfr. Part No. LVS04855
Each
£318.85
Eaton 80A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1548
  • Mfr. Part No. XS80
Each (In a Box of 10)
£51.241
Eaton xEffect MCB, 3P, 1.5A Curve D
  • RS Stock No. 230-0994
  • Mfr. Part No. 177410 FAZ6-D1,5/3
Each
£116.13
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 231-146
  • Mfr. Part No. 113363 NZMH2-M160-SVE
Each
£1,216.84
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-238
  • Mfr. Part No. 3VA6440-7HN41-2AA0
Each
£3,432.45
Schneider Electric Acti9 Acti9 Reflex MCB, 2P, 10A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 354-419
  • Mfr. Part No. A9C63210
Each
£279.99
Phoenix Contact 1 Phase Surge Arrester, DIN Rail Mount
  • RS Stock No. 135-968
  • Mfr. Part No. 2906100
Each (In a Pack of 10)
£28.61
Schneider Electric EasyPact Electronic Circuit Breaker 12.5A, Plug In
  • RS Stock No. 122-465
  • Mfr. Part No. LV510442P
Each
£142.22
Siemens 630A Tag Fuse, 137mm, 1kV, 106.6mm
  • RS Stock No. 608-826
  • Mfr. Part No. 3NE3236-0MK08
1 Pack of 3
£409.19
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 3 channels
  • RS Stock No. 157-332
  • Mfr. Part No. 3VA2216-6HM32-0AA0
Each
£993.84
Eaton RCBO, 32A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type B, FRBm6 Range
  • RS Stock No. 123-325
  • Mfr. Part No. 170815 FRBM6-B32/2/01-LIA
Each
£149.63
Siemens Surge Suppressor Unit, 70V dc, DIN Rail Mount
  • RS Stock No. 266-9452
  • Mfr. Part No. 3RT1956-1CB00
Each
£36.07
Better World
Schneider Electric, Masterpact MCCB 3P 1.6kA, Fixed Mount
  • RS Stock No. 248-3776
  • Mfr. Part No. LV848043
Each
£5,677.14
Electro PJP AdaBV140 Adapter for use with Screw Terminal Block
  • RS Stock No. 275-3342
  • Mfr. Part No. AdaBV140-R
Each
£3.87
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