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

2454 of 999+
Temporarily out of stock
ABB S804N MCB, 4P, 13A Curve B, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 141-169
  • Mfr. Part No. 2CCS894001R0135
Each
SGD555.04(exc. GST)
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0892
  • Mfr. Part No. 3WA9111-0BG11
Each
SGD128.56(exc. GST)
Temporarily out of stock
ABB S801N MCB, 1P, 6A Curve B, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-960
  • Mfr. Part No. 2CCS891001R0065
Each
SGD177.46(exc. GST)
Temporarily out of stock
Legrand 100A M Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 266-3165
  • Mfr. Part No. 0 151 95
1 Box of 10
SGD363.75(exc. GST)
In Stock
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 774-0112
Each
SGD3.91(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3838
  • Mfr. Part No. 3VA2063-5KQ46-0AA0
Each
SGD2,311.41(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 20A, Breaking Capacity 100 kA, Screw Mount
  • RS Stock No. 244-920
  • Mfr. Part No. BJL36020LU
Each
SGD1,086.66(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, 40A, 1100V dc, Wall Mount Mount
  • RS Stock No. 509-658
  • Mfr. Part No. 1029990
Each
SGD876.56(exc. GST)
Temporarily out of stock
Siemens SENTRON Interlock for use with 3VA20/21/22
  • RS Stock No. 161-620
  • Mfr. Part No. 3VA9268-0VK20
Each
SGD27.41(exc. GST)
In Stock
Nidec Components 0.2A Resettable Fuse, 60V
  • RS Stock No. 637-6319
  • Mfr. Part No. PRCP-R020-0-99
Each (In a Pack of 10)
SGD0.735(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 3+N, 4A Curve C, 400V AC, 72V DC
  • RS Stock No. 213-1058
  • Mfr. Part No. 5SL6604-7
Each
SGD225.01(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5225
  • Mfr. Part No. 3VA2440-5HN42-0AA0
Each
SGD3,954.08(exc. GST)
Temporarily out of stock
Lovato MCB, 2P, 16A Curve C, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1648
  • Mfr. Part No. P1MBUH2PC16
Each
SGD187.20(exc. GST)
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 500A NZM, 3 channels , Fixed
  • RS Stock No. 121-011
  • Mfr. Part No. 168452 NZMC3-A500-SVE
Each
SGD3,721.58(exc. GST)
Temporarily out of stock
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0929
  • Mfr. Part No. 3WA9111-0EK41
1 Set
SGD262.56(exc. GST)
Temporarily out of stock
Lovato SM Undervoltage Release for use with SM2, SM3 Series Circuit Breakers
  • RS Stock No. 248-5679
  • Mfr. Part No. SM2X14400
Each
SGD64.24(exc. GST)
Temporarily out of stock
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 221-5606
  • Mfr. Part No. 3-128-216
1 Box of 10
SGD278.37(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-3711
  • Mfr. Part No. 1SDA071686R1
Each
SGD17,939.61(exc. GST)
Temporarily out of stock
Eaton RCBO, 10A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type C, FRBdM Range
  • RS Stock No. 120-945
  • Mfr. Part No. 168217 FRBDM-C10/2/01-G/A
Each
SGD361.40(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1705
  • Mfr. Part No. 3VA2040-5KP46-0AA0
Each
SGD1,994.60(exc. GST)
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