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

46578 Products showing for Fuses & Circuit Breakers

266 / 999+
Temporarily out of stock
Schneider Electric Acti9 iID RCCB, 25A, 4 Pole, 30mA, Type A-SI, 380 → 415V ac
  • RS Stock No. 654-743
  • Mfr. Part No. A9R61425
Each
MYR2,640.97
Temporarily out of stock
Siemens 6A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-088
  • Mfr. Part No. 3NC1006-0MK
1 Pack of 20
MYR961.52
In Stock
RS PRO 3 Phase Industrial Surge Protector, 140kA, 2.5kV, DIN Rail Mount
  • RS Stock No. 101-770
Each
MYR4,227.96
Temporarily out of stock
Siemens 200A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2129
  • Mfr. Part No. 3NA7140
Each (In a Pack of 3)
MYR83.423
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-9481
  • Mfr. Part No. C10H4TM063
Each
MYR4,872.84
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 10A Curve C, 100 → 130V AC, 12 → 144V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9400
  • Mfr. Part No. A9F94210
Each
MYR1,042.41
Temporarily out of stock
Eaton 2A Tag Fuse, 14 x 67mm, 550V
  • RS Stock No. 228-795
  • Mfr. Part No. ESD2
1 Pack of 20
MYR1,552.71
In Stock
RS PRO 100A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3645
Each (In a Pack of 5)
MYR89.634
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4026
  • Mfr. Part No. 3VA2110-8HN32-0AA0
Each
MYR5,472.09
In Stock
Littelfuse 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3172P
  • Mfr. Part No. 0KLK001.T
Each (Supplied in a Bag)
MYR153.09
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 4A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2304
  • Mfr. Part No. A9F07204
Each
MYR411.30
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 1.6A, Type Z, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-172
  • Mfr. Part No. 2CDS273001R0258
Each
MYR2,444.33
In Stock
Littelfuse PC Board Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 738-3056
  • Mfr. Part No. 0251.500MRT1L
Each (In a Pack of 10)
MYR4.114
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7881
  • Mfr. Part No. C25F34V100
Each
MYR14,796.42
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 16A
  • RS Stock No. 224-7899
  • Mfr. Part No. 3VA1196-4ED26-0AA0
Each
MYR1,617.82
In Stock
Mersen 125A NH Fuse, NH2, 400V ac
  • RS Stock No. 270-3050
  • Mfr. Part No. H223728
Each
MYR133.33
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3259
  • Mfr. Part No. A9DA2620
Each
MYR1,307.64
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3237
  • Mfr. Part No. A9F53332
Each
MYR1,244.74
In Stock
Better World
Schneider Electric Compact Nsx, Compact Nsx Dc Mounting Plate for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1177
  • Mfr. Part No. LV429282
Each
MYR1,560.74
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IUGN6 Single Pole Panel Mount, 20A Current Rating
  • RS Stock No. 275-0287
  • Mfr. Part No. IUGN6-1-63F-20.0
Each
MYR379.34
1
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