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

73 of 999+
Temporarily out of stock
Siemens 32A Cartridge Fuse, 22 X 58mm
  • RS Stock No. 665-078
  • Mfr. Part No. 3NW8212-1
1 Pack of 10
SGD136.56(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 2P, 80A Curve C, 400V AC, 110V DC, 6 kA Breaking Capacity
  • RS Stock No. 200-927
  • Mfr. Part No. 2CDS252001R0804
Each
SGD356.25(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Vigi iC60 MCB, 4P, 63A, Type A, 415V AC
  • RS Stock No. 248-3707
  • Mfr. Part No. A9V25463
Each
SGD487.72(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 63A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 272-7446
  • Mfr. Part No. C10F6TM063
Each
SGD912.14(exc. GST)
Temporarily out of stock
ABB S800U MCB, 2P, 40A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-407
  • Mfr. Part No. 2CCS862017R0557
Each
SGD407.86(exc. GST)
In Stock
ABB PS2 2 Phase Busbar, 400V
  • RS Stock No. 231-9635
  • Mfr. Part No. 2CDL220001R1058 PS2/58
1 Box of 1
SGD121.80(exc. GST)
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 10A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8968
  • Mfr. Part No. 5SY6510-6
Each
SGD84.33(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 3A Curve D, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7823
  • Mfr. Part No. 2CDS251001R0031 S201-D3
Each
SGD33.57(exc. GST)
In Stock
Better World
Schneider Electric iC60 RCD, 25A, 30mA
  • RS Stock No. 776-2878
  • Mfr. Part No. A9Q01225
Each
SGD486.56(exc. GST)
Limited stock
Phoenix Contact Thermal Circuit Breaker - TMC 1 Single Pole 65 V dc, 250V ac Voltage Rating DIN Rail Mount, 2A Current
  • RS Stock No. 801-6983
  • Mfr. Part No. 0914099
Each
SGD138.21(exc. GST)
In Stock
Littelfuse 125A Grey, White CF Car Fuse, 58V dc
  • RS Stock No. 337-7943
  • Mfr. Part No. 155.0892.6121
Each
SGD15.01(exc. GST)
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-479
  • Mfr. Part No. FP 1217
Each
SGD298.14(exc. GST)
In Stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 255-621
  • Mfr. Part No. 266633 NZM2-XHBR
Each
SGD238.87(exc. GST)
In Stock
Better World
Schneider Electric iID RCCB, 40A, 4 Pole, 30mA, Type A, 380 → 415V ac
  • RS Stock No. 806-7376
  • Mfr. Part No. A9R21440
Each
SGD473.82(exc. GST)
In Stock
ABB 18 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1896
  • Mfr. Part No. 1SL1203A00 65P18X12
Each
SGD50.11(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 178-8172
  • Mfr. Part No. LV426277
Each
SGD521.19(exc. GST)
In Stock
Eaton Eaton Moeller xPole 2 Phase Busbar, 500V
  • RS Stock No. 255-097
  • Mfr. Part No. 219573 EVG-2PHAS/4MODUL/HI
Each
SGD6.87(exc. GST)
Temporarily out of stock
Eaton 690V ac Circuit Trip Circuit Trip for use with IZMX16…-P…, IZMX40…-P…
  • RS Stock No. 132-516
  • Mfr. Part No. 184142 IZMX-PXR-PTM-1
Each
SGD1,935.03(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-9427
  • Mfr. Part No. C10F3MA050
Each
SGD836.98(exc. GST)
Temporarily out of stock
Phoenix Contact AB2/SS Fixing Bracket for use with 3 mm x 10 mm or 6 mm x 6 mm busbar
  • RS Stock No. 131-614
  • Mfr. Part No. 404431
1 Pack of 1
SGD6.12(exc. GST)
1
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