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

49110 Products showing for Fuses & Circuit Breakers

35 of 999+
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 20A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3348
  • Mfr. Part No. A9F54220
Each
SGD195.21(exc. GST)
Eaton PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 769-3331
  • Mfr. Part No. SS-5-2A-BK
Each (In a Pack of 5)
SGD1.43(exc. GST)
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 10A Curve C
  • RS Stock No. 216-5933
  • Mfr. Part No. 5SY4610-7
Each
SGD327.62(exc. GST)
SIBA 4A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3442
  • Mfr. Part No. 70-010-04/4A
Each (In a Pack of 5)
SGD7.612(exc. GST)
Siemens SENTRON Cover for use with Three-Phase Current Busbar
  • RS Stock No. 202-7166
  • Mfr. Part No. 5SH5514
Each (In a Pack of 10)
SGD4.039(exc. GST)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 25A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Each
SGD270.15(exc. GST)
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
SGD138.17(exc. GST)
Eaton xEffect MCB, 2P, 1.5A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3229
  • Mfr. Part No. 102159 FAZ-C1,5/2-NA
Each
SGD163.04(exc. GST)
Wickmann 35A Green Blade Car Fuse, 32V dc
  • RS Stock No. 174-0720
  • Mfr. Part No. 0287035.PXCN
Each (In a Pack of 50)
SGD0.362(exc. GST)
Eaton 100A Rail Mount Fuse Holder for A3 Fuse, 1P, 690V ac
  • RS Stock No. 418-489
  • Mfr. Part No. CM100F
Each
SGD102.71(exc. GST)
RS PRO 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 611-8999
Each (In a Pack of 10)
SGD1.596(exc. GST)
Better World
Schneider Electric Compact Nsx, Compact Nsx Dc, Easypact Cvs Mechanical Interlock for use with Compact Nsx 400/630
  • RS Stock No. 221-1272
  • Mfr. Part No. LV432621
Each
SGD543.60(exc. GST)
Better World
Schneider Electric Acti 9 iC60L MCB, 4P, 40A Curve C, 100 → 130V AC, 12 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9327
  • Mfr. Part No. A9F94440
Each
SGD294.06(exc. GST)
Better World
Siemens 5SV3 RCCB, 40A, 2 Pole, 30mA, Type F, 230V ac
  • RS Stock No. 209-6567
  • Mfr. Part No. 5SV3314-3
Each
SGD439.76(exc. GST)
ABB S803S MCB, 3P, 80A, KM, 690V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-728
  • Mfr. Part No. 2CCS863001R0626
Each
SGD682.08(exc. GST)
ABB S800U MCB, 2P, 30A, Type Z, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-898
  • Mfr. Part No. 2CCS862017R0305
Each
SGD380.59(exc. GST)
ABB System Pro M Compact S200 M UC MCB, 2P, 30A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-024
  • Mfr. Part No. 2CDS272061R0528
Each
SGD406.39(exc. GST)
Eaton 160A British Standard Fuse, B2, 660V ac, 111mm
  • RS Stock No. 415-288
  • Mfr. Part No. TF160
Each
SGD165.47(exc. GST)
Eaton xPole MCB, 1+N, 6A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1084
  • Mfr. Part No. 264743 PLG4-C6/1N
Each
SGD24.91(exc. GST)
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 147-383
  • Mfr. Part No. 3VA5215-0BB31-0AA0
Each
SGD1,099.33(exc. GST)
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