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

81 of 999+
In Stock
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8953
  • Mfr. Part No. R9H13404
Each
SGD173.03(exc. GST)
Temporarily out of stock
Better World
Schneider Electric 690 V ac, 750V dc Circuit Trip for use with Compact NSX 100/160 Circuit Breakers
  • RS Stock No. 212-0237
  • Mfr. Part No. LV429164
Each
SGD247.35(exc. GST)
In Stock
ABB Emax 2, Tmax XT Electronic Time Delay for use with MCCB
  • RS Stock No. 232-0082
  • Mfr. Part No. 1SDA038320R1 UVD 220-250VAC/DC T7-X-E
Each
SGD957.35(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Acti 9 C120N MCB, 2P, 80A Curve C, 440V AC, 250V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3054
  • Mfr. Part No. A9N18361
Each
SGD559.27(exc. GST)
Temporarily out of stock
ABB High Performance S800N MCB, 2P, 63A Curve D, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 435-257
  • Mfr. Part No. 2CCS892001R0631 S802N-D63
Each
SGD278.78(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 4P, 20A Curve B, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2350
  • Mfr. Part No. M9F21420
Each
SGD326.06(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 18 kA, Fixed Mount
  • RS Stock No. 147-772
  • Mfr. Part No. 3VA5210-5EC31-1AA0
Each
SGD1,138.63(exc. GST)
In Stock
Better World
Schneider Electric iID RCCB, 63A, 4 Pole, 30mA
  • RS Stock No. 734-9138
  • Mfr. Part No. A9R11463
Each
SGD670.73(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 4P, 16A Curve C, 125V AC, 440V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9770
  • Mfr. Part No. 2CDS274001R0164 S204M C 16A - 15 KA
1 Box of 1
SGD246.20(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 450A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 256-518
  • Mfr. Part No. 3VA5445-6EF31-0AA0
Each
SGD4,685.97(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 450A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-347
  • Mfr. Part No. 3VA5445-6EC31-1AA0
Each
SGD4,483.58(exc. GST)
In Stock
Better World
Schneider Electric Auto Recloser Circuit Trip for use with Circuit Breaker
  • RS Stock No. 790-7359
  • Mfr. Part No. A9C70134
Each
SGD570.63(exc. GST)
In Stock
Eaton 30A Green Automotive Car Fuse, 32V dc
  • RS Stock No. 848-2560
  • Mfr. Part No. ATC-30
Each
SGD1.61(exc. GST)
In Stock
Schurter PC Board Non Resettable Fuse, Radial 400mA, 250V ac
  • RS Stock No. 284-5293
  • Mfr. Part No. 0034.6611
Each (In a Pack of 10)
SGD0.842(exc. GST)
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2125
  • Mfr. Part No. 5SY4316-7
Each
SGD132.34(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 3P, 25A Curve D, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 746-8181
  • Mfr. Part No. 2CDS273001R0251 S203M-D25
Each
SGD133.14(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 16A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1256
  • Mfr. Part No. 5SY4116-8
Each
SGD60.26(exc. GST)
In Stock
Better World
ABB, XT2S MCCB 3P 480A, Fixed Mount
  • RS Stock No. 236-7493
  • Mfr. Part No. 1SDA067768R1 XT2S 160 MA 80 FF
Each
SGD539.56(exc. GST)
In Stock
Eaton xEffect MCB, 1P, 2A Curve C, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7162
  • Mfr. Part No. 279122 FAZ-C2/1-DC
Each
SGD141.50(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 16A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2396
  • Mfr. Part No. M9F23216
Each
SGD51.95(exc. GST)
1
81
2456
Results per page

Related links