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

2448 of 999+
ABB S802N MCB, 2P, 13A Curve B, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 141-123
  • Mfr. Part No. 2CCS892001R0135
Each
SGD266.86(exc. GST)
ABB S801N MCB, 1P, 13A Curve D, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-857
  • Mfr. Part No. 2CCS891001R0131
Each
SGD135.99(exc. GST)
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3359
  • Mfr. Part No. 1SDA071274R1
Each
SGD58,342.64(exc. GST)
ABB S803C MCB, 3P, 40A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 141-216
  • Mfr. Part No. 2CCS883001R0557
Each
SGD334.97(exc. GST)
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0785
  • Mfr. Part No. 3WA9111-0AN12
Each
SGD167.31(exc. GST)
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3322
  • Mfr. Part No. A9DS1620
Each
SGD469.83(exc. GST)
Bourns SMD Non Resettable Fuse 30A, 250V ac
  • RS Stock No. 187-8681
  • Mfr. Part No. SF-3812F3000T-2
Each (In a Pack of 10)
SGD3.62(exc. GST)
Siemens SENTRON Closing Coil
  • RS Stock No. 277-0722
  • Mfr. Part No. 3WA9111-0AD15
Each
SGD359.20(exc. GST)
Siemens, SENTRON MCCB 4P 110A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-668
  • Mfr. Part No. 3VA5211-5EC41-0AA0
Each
SGD1,782.35(exc. GST)
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3377
  • Mfr. Part No. 1SDA071301R1
Each
SGD74,774.30(exc. GST)
Siemens 400V ac Push Button
  • RS Stock No. 231-8416
  • Mfr. Part No. 5TE4813
Each
SGD140.74(exc. GST)
Siemens SENTRON Rotary Operator for use with 3VA12
  • RS Stock No. 157-988
  • Mfr. Part No. 3VA9257-0EK11
Each
SGD126.11(exc. GST)
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Touch LSIG, 4 / f channels
  • RS Stock No. 259-3963
  • Mfr. Part No. 1SDA072016R1
Each
SGD79,428.21(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - CPP Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0182
  • Mfr. Part No. CPP11-52-10.0A-OC-V
Each
SGD35.97(exc. GST)
Eaton RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, Type C, FRBDM Range
  • RS Stock No. 120-979
  • Mfr. Part No. 168203 FRBDM-C13/2/003-G/A
Each
SGD351.79(exc. GST)
ABB Emax2 Electronic Circuit Breaker 630A Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4011
  • Mfr. Part No. 1SDA072070R1
Each
SGD10,438.05(exc. GST)
Better World
Siemens, SENTRON MCCB 1P 80A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9425
  • Mfr. Part No. 3VA1180-5ED16-0AA0
Each
SGD287.65(exc. GST)
Eaton 1.1A Resettable Fuse, 6V
  • RS Stock No. 225-8232
  • Mfr. Part No. PTSLR08056V110
1 Reel of 4000
SGD1,991.88(exc. GST)
RS PRO 25A NH Fuse, NH000, 415V ac
  • RS Stock No. 221-3671
Each (In a Pack of 3)
SGD21.13(exc. GST)
ABB S403M MCB, 3P, 50A Curve D, 12V AC, 10 kA Breaking Capacity
  • RS Stock No. 140-480
  • Mfr. Part No. 2CCS573001R0501
Each
SGD442.75(exc. GST)
1
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