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

44 / 999+
Eaton 450A Bolted Tag Fuse, FMM, 500 V dc, 690V ac, 83.7mm
  • RS Stock No. 182-1410
  • Mfr. Part No. 450FMM
Each
MYR440.17
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1296
  • Mfr. Part No. 5SY4206-7
Each
MYR512.36
Schneider Electric, ComPacT NSX MCCB 3P 50A, Fixed Mount
  • RS Stock No. 254-6271
  • Mfr. Part No. C103MA050
Each
MYR868.37
ABB 160A Solid Link for NH Fuses
  • RS Stock No. 251-3301
  • Mfr. Part No. 1SCA022003R9680
Each
MYR197.40
Better World
ABB System Pro M Compact S200 MCB, 3P, 50A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9661
  • Mfr. Part No. 2CDS253001R0501 S203-D50
Each
MYR438.74
ABB FH200 RCCB, 40A, 4 Pole, 30mA, Type AC, 230V
  • RS Stock No. 540-1650
  • Mfr. Part No. 2CSF204006R1400 FH204 AC-40/0,03
Each
MYR488.05
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690V ac
  • RS Stock No. 189-5335
  • Mfr. Part No. H1062699 / CMC102
Each
MYR94.02
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 2A Curve C, 12 → 60 V, 100 → 130 V, 220 → 240 V, 380
  • RS Stock No. 734-9131
  • Mfr. Part No. A9F74202
Each
MYR750.26
Weidmuller Electronic Circuit breaker 24V AMG FIM-0, 2 channels , DIN Rail Mount
  • RS Stock No. 179-2988
  • Mfr. Part No. 2081870000
Each
MYR28.23
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 63A Curve C, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3458
  • Mfr. Part No. A9F54463
Each
MYR1,533.34
Siemens 4A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 396-168
  • Mfr. Part No. 5SB221
Each (In a Pack of 5)
MYR7.64
Better World
Siemens Sentron 5SY4 MCB, 3P, 6A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 772-1366
  • Mfr. Part No. 5SY4306-7
Each
MYR507.90
SIBA 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3292
  • Mfr. Part No. 70-007-65/1A
Each (In a Pack of 10)
MYR1.448
Eaton 13A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-605
  • Mfr. Part No. TDC180-13A
Each (In a Pack of 10)
MYR4.683
ABB 100A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 251-3436
  • Mfr. Part No. 1SCA022627R1550
1 Box of 9
MYR253.17
Europa RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC, EUC7R Range
  • RS Stock No. 210-4739
  • Mfr. Part No. EUC7RC.16/1CA
Each
MYR338.01
RS PRO 16A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3648
1 Bag of 5
MYR167.07
Eaton 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-0972
  • Mfr. Part No. S500-8-R
Each (In a Pack of 10)
MYR0.755
RS PRO 500mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5985
Each (In a Pack of 10)
MYR1.798
nVent ERIFLEX ERIFLEX Busbar
  • RS Stock No. 277-6178
  • Mfr. Part No. 568662
Each
MYR149.55
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