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

48 of 999+
In Stock
Eaton 32A Rail Mount Fuse Holder for F1 Fuse, 1P, 550V ac
  • RS Stock No. 418-495
  • Mfr. Part No. 32NNSF
Each
SGD12.34(exc. GST)
In Stock
ABB S800PV MCB, 2P, 16A Curve B, 800V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5918
  • Mfr. Part No. 2CCF019599R0001 S802PV-SP16 - 5 kA
Each
SGD342.08(exc. GST)
In Stock
Eaton RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, PXK Range
  • RS Stock No. 183-3545
  • Mfr. Part No. 236964 PXK-C16/1N/003-A
Each
SGD97.09(exc. GST)
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1296
  • Mfr. Part No. 5SY4206-7
Each
SGD164.80(exc. GST)
Temporarily out of stock
Better World
Siemens 3VA94 RCD, 630A, 4 Pole, Type A
  • RS Stock No. 218-1855
  • Mfr. Part No. 3VA9424-0RL30
Each
SGD2,984.69(exc. GST)
In Stock
Mersen 3.15A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-874
  • Mfr. Part No. R090520Q
1 Box of 10
SGD7.85(exc. GST)
In Stock
SIBA 20A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3399
  • Mfr. Part No. 70-059-60/20A
Each (In a Pack of 10)
SGD1.017(exc. GST)
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7772
  • Mfr. Part No. 2CDS253001R0324 S203-C32
Each
SGD74.65(exc. GST)
In Stock
RS PRO Brass Earth Clamp
  • RS Stock No. 426-3132
Each (In a Pack of 5)
SGD7.89(exc. GST)
In Stock
F Lutze Ltd Copper Bus Bar Interconnection Strip, 1 Piece pieces
  • RS Stock No. 891-8962
  • Mfr. Part No. 716426
Each (In a Pack of 5)
SGD49.666(exc. GST)
In Stock
Littelfuse 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4410
  • Mfr. Part No. 0217002.MXP
Each (In a Pack of 10)
SGD0.495(exc. GST)
In Stock
nVent ERICO DPCB Busbar
  • RS Stock No. 646-799
  • Mfr. Part No. 550410
Each
SGD302.19(exc. GST)
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type B, System Pro M Compact Range
  • RS Stock No. 201-6966
  • Mfr. Part No. 2CSR255080R2165 DS201 B16 AC100
Each
SGD194.70(exc. GST)
Unavailable
Littelfuse 1.25A Resettable Fuse, 240V ac/dc
  • RS Stock No. 869-7384P
  • Mfr. Part No. LVR125S-240
Each (Supplied in a Box)
SGD1.35(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 63A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-087
  • Mfr. Part No. 2CDS272001R0634 S202M-C63
Each
SGD64.33(exc. GST)
In Stock
Eaton 125A British Standard Fuse, B2, 660V ac, 111mm
  • RS Stock No. 415-272
  • Mfr. Part No. TF125
Each
SGD170.68(exc. GST)
Temporarily out of stock
Eaton ZSD Distribution Board
  • RS Stock No. 250-759
  • Mfr. Part No. 193717 ZSD-2Z1TV-1400-A
Each
SGD3,136.95(exc. GST)
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-7467
  • Mfr. Part No. 1SDA067736R1 XT2N 160 TMG 125A FF
Each
SGD1,485.67(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 50mA, 125V ac
  • RS Stock No. 738-3309
  • Mfr. Part No. 39600500000
Each (In a Pack of 10)
SGD2.992(exc. GST)
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 10A Curve B, 230V AC
  • RS Stock No. 209-7502
  • Mfr. Part No. 5SL6010-6
Each
SGD89.02(exc. GST)
1
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