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

46580 Products showing for Fuses & Circuit Breakers

1 / 999+
Siemens 80A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-664
  • Mfr. Part No. 3NA3824
Each (In a Pack of 3)
MYR126.38
Eaton 1A Cartridge Fuses, 14 x 51mm
  • RS Stock No. 261-880
  • Mfr. Part No. C14M1S
1 Pack of 10
MYR408.83
Siemens 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 397-363
  • Mfr. Part No. 3NA3805
Each (In a Pack of 3)
MYR42.90
Siemens 630A Slotted Tag Fuse, NH3, 690V
  • RS Stock No. 230-3005
  • Mfr. Part No. 3NE1436-3
Each (In a Pack of 3)
MYR1,409.093
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 2A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8978
  • Mfr. Part No. 5SY7502-7
Each
MYR473.73
Eaton 5A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 458-8526
  • Mfr. Part No. KTK-5
Each (In a Pack of 5)
MYR47.054
Better World
ABB System Pro M Compact S200 MCB, 3P, 63A Curve D, 440V AC, 12V DC, 6 kA Breaking Capacity
  • RS Stock No. 527-9677
  • Mfr. Part No. 2CDS253001R0631 S203-D63
Each
MYR486.13
Mersen 30A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0522
  • Mfr. Part No. G1014582 / FR10GR69V30
Each (In a Box of 10)
MYR46.747
Littelfuse 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 738-2829
  • Mfr. Part No. 0326015.MXP
Each (In a Pack of 10)
MYR7.945
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 20A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2272
  • Mfr. Part No. A9F07120
Each
MYR126.17
Better World
Siemens Sentron 5SY6 MCB, 2P, 16A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3631
  • Mfr. Part No. 5SY6216-7
Each
MYR382.16
Siemens 160A Solid Link for LV HRC Fuses
  • RS Stock No. 395-715
  • Mfr. Part No. 3NG1002
Each (In a Pack of 3)
MYR47.85
Bulgin 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 512-6006
  • Mfr. Part No. FX0419
Each
MYR59.65
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 25A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3395
  • Mfr. Part No. A9F76225
Each
MYR768.57
Eaton xEffect FAZ MCB, 4P, 35A Curve B, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 239-793
  • Mfr. Part No. 190861 FAZ-B35/4-RT
Each
MYR1,319.93
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 20A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3458
  • Mfr. Part No. A9F77120
Each
MYR230.13
Schneider Electric Surge Arrester, 75kA, 1200V (Volts), Plug In Mount
  • RS Stock No. 357-350
  • Mfr. Part No. M9L12240
Each
MYR3,447.67
Mersen 5A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6782
  • Mfr. Part No. S084311
Each (In a Pack of 10)
MYR20.513
Littelfuse 15A Screw Mount ATO Blade Fuse Block, 32V
  • RS Stock No. 250-6314
  • Mfr. Part No. 03500417TXN
Each
MYR115.34
Mersen 6A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2927
  • Mfr. Part No. W085257
1 Box of 10
MYR1,304.77
Results per page
1
2
3
2329

Related links