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

134 / 999+
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 1P, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 191-6110
  • Mfr. Part No. A9P24620
Each
MYR570.96
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 182-1796
  • Mfr. Part No. CHCC3DU
Each
MYR142.29
RS PRO 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-6017
Each (In a Pack of 10)
MYR3.089
Eaton 6A D02 Diazed Fuse, gG, 500V ac
  • RS Stock No. 181-8791
  • Mfr. Part No. 6D27
Each
MYR8.38
Hager Auxiliary Contact, 2 Contact, 2NO, DIN, MZ9
  • RS Stock No. 251-2076
  • Mfr. Part No. MZ905
Each
MYR2,104.74
Mersen 40A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7482
  • Mfr. Part No. N213613
Each (In a Pack of 10)
MYR26.746
Eaton, xEnergy MCCB 3P 63A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 454-8118
  • Mfr. Part No. 259083 NZMN1-A63
Each
MYR2,643.47
Eaton 630mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3826
  • Mfr. Part No. GDC-630MA
Each
MYR21.78
Mersen 55A British Standard Fuse, 17 x 49mm, 690V, 61 → 65.5mm
  • RS Stock No. 238-4029
  • Mfr. Part No. F220966
Each
MYR240.57
Wickmann 200A Inline Fuse Holder, 32V dc
  • RS Stock No. 174-0208
  • Mfr. Part No. 04980921GXM5
Each (In a Box of 500)
MYR22.839
ABB S203L MCB, 3P, 6A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 201-390
  • Mfr. Part No. 2CDS243701R0064
Each
MYR421.12
Better World
ABB System Pro M Compact S200 MCB, 3P, 25A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9627
  • Mfr. Part No. 2CDS253001R0251 S203-D25
Each
MYR417.10
Littelfuse 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 769-0142
  • Mfr. Part No. 82000000005
Each (In a Pack of 5)
MYR12.278
Eaton 315A Centred Tag Fuse, NH1, 690 V, 700 V
  • RS Stock No. 851-1918
  • Mfr. Part No. 170M3817D
Each
MYR1,039.48
Littelfuse Non-Resettable Wire Ended Fuse 5A, 125V ac/dc
  • RS Stock No. 738-3021
  • Mfr. Part No. 0251005.MRT1L
Each (In a Pack of 10)
MYR3.449
Littelfuse 0.5A Resettable Fuse, 24V dc
  • RS Stock No. 517-7111
  • Mfr. Part No. MINISMDC050F-2
Each (In a Pack of 10)
MYR1.539
Better World
Schneider Electric 220V ac/dc Remote Tripping Device Circuit Trip for use with LR3D Series, LRD Series
  • RS Stock No. 608-9100
  • Mfr. Part No. LAD703M
Each
MYR378.17
Schurter 10A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4771
  • Mfr. Part No. 0090.0010
Each
MYR83.49
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 250 DC
  • RS Stock No. 260-7839
  • Mfr. Part No. C253TM250D
Each
MYR3,485.15
Hager MCCB 4P 160A, Breaking Capacity 2 kA, DIN Rail Mount
  • RS Stock No. 144-4932
  • Mfr. Part No. HCA161H
Each
MYR5,158.35
1
134
2329
Results per page

Related links