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

51 of 999+
In Stock
ABB System Pro M Compact S200M MCB, 3P, 25A Curve C, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-4302
  • Mfr. Part No. 2CDS273001R0254 S203M-C25
Each
SGD149.81(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 25A Current Rating
  • RS Stock No. 782-7990
  • Mfr. Part No. W58-XB1A4A-25
Each
SGD13.69(exc. GST)
In Stock
Mersen 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P, 690V ac
  • RS Stock No. 768-3775
  • Mfr. Part No. E331135
Each
SGD101.30(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 16A Curve C, 400V AC, 12 → 144V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9419
  • Mfr. Part No. A9F94216
Each
SGD69.44(exc. GST)
In Stock
SIBA 4A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3365
  • Mfr. Part No. 70-059-60/4A
Each (In a Pack of 10)
SGD1.008(exc. GST)
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 63A, 4 Pole, 300mA
  • RS Stock No. 776-3714
  • Mfr. Part No. A9R34463
Each
SGD612.90(exc. GST)
Temporarily out of stock
ABB F200 RCCB, 80A, 4 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 225-6121
  • Mfr. Part No. 2CSF204001R3800 F204 AC-80/0,3
Each
SGD495.46(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 1P, 10A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4144
  • Mfr. Part No. 2CDS271001R0104 S201M-C10
Each
SGD24.47(exc. GST)
In Stock
Schurter 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 269-3858
  • Mfr. Part No. 7010.3470
Each
SGD1.38(exc. GST)
In Stock
ABB, Protecta MCCB 3P 250A, DIN Rail Mount
  • RS Stock No. 831-9185
  • Mfr. Part No. 1SDA068210R1 XT3D 250 3p F F
Each
SGD427.55(exc. GST)
In Stock
Legrand DX Range DX3 MCB, 4P, 100A Curve C, 5 kA Breaking Capacity
  • RS Stock No. 731-9770
  • Mfr. Part No. 4 098 02
Each
SGD1,922.60(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 1P, 20A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 191-6122
  • Mfr. Part No. A9P34620
Each
SGD212.18(exc. GST)
In Stock
Siemens 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 203-2048
  • Mfr. Part No. 3NW7013
Each
SGD17.81(exc. GST)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 4A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4951
  • Mfr. Part No. 5SY6104-7
Each
SGD23.32(exc. GST)
In Stock
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 703-8197
  • Mfr. Part No. CCP-3-30CC
Each
SGD345.51(exc. GST)
In Stock
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS Stock No. 563-447
Each (In a Pack of 10)
SGD1.007(exc. GST)
In Stock
RS PRO 1A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 413-197
Each (In a Pack of 10)
SGD1.738(exc. GST)
Temporarily out of stock
ABB S801S RCCB, 32A, 1 Pole, 690V
  • RS Stock No. 140-917
  • Mfr. Part No. 2CCS801901R0539
Each
SGD388.77(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse 125mA, 125V ac/dc
  • RS Stock No. 738-3068
  • Mfr. Part No. 0251.125MAT1L
Each (In a Pack of 10)
SGD2.079(exc. GST)
Currently unavailable
Schurter 2.5A FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-0274
  • Mfr. Part No. 0034.0905
Each (In a Pack of 10)
SGD8.64(exc. GST)
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