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

46604 Products showing for Fuses & Circuit Breakers

1 / 999+
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 16A Current Rating
  • RS Stock No. 729-2764
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-16A
Each
MYR171.07
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 769-0170
  • Mfr. Part No. 03453LF1H
Each
MYR25.20
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
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 32A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2398
  • Mfr. Part No. M9F23232
Each
MYR191.92
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 25A Current Rating
  • RS Stock No. 729-2776
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-25A
Each
MYR159.15
RS PRO 250mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6060
Each (In a Pack of 10)
MYR3.534
Better World
Siemens SENTRON 5SY6 MCB, 2P, 20A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 209-6016
  • Mfr. Part No. 5SY6220-7
Each
MYR332.28
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
Better World
Siemens Sentron 5SY4 MCB, 1P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2030
  • Mfr. Part No. 5SY4116-7
Each
MYR109.03
Littelfuse 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2788
  • Mfr. Part No. 0218001.MXP
Each (In a Pack of 10)
MYR3.079
Littelfuse 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 894-9593
  • Mfr. Part No. 04773.15MXP
Each (In a Pack of 5)
MYR9.262
Littelfuse 4A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0124
  • Mfr. Part No. 0313004.HXP
Each (In a Pack of 5)
MYR6.116
Schurter PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 284-5300
  • Mfr. Part No. 0034.6612
Each (In a Pack of 10)
MYR3.129
Better World
ABB System Pro M Compact S200M MCB, 2P, 20A Curve D, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8172
  • Mfr. Part No. 2CDS272001R0201 S202M-D20
Each
MYR298.99
Siemens 80A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-664
  • Mfr. Part No. 3NA3824
Each (In a Pack of 3)
MYR126.38
RS PRO 6A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2494
Each (In a Pack of 5)
MYR19.742
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
Eaton 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8374
  • Mfr. Part No. C10G6
Each (In a Pack of 10)
MYR8.128
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1177
  • Mfr. Part No. S500-2-R
Each (In a Pack of 10)
MYR1.723
RS PRO 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9888
Each (In a Pack of 10)
MYR2.41
Results per page
1
2
3
2331

Related links