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

72 of 999+
In Stock
Better World
Schneider Electric Acti 9 IC60L MCB, 1P, 6A Curve K, 230V AC, 72V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0142
  • Mfr. Part No. A9F95106
Each
SGD195.51(exc. GST)
In Stock
Eaton Fuse Puller, Sizes 13/32 → 13/16in
  • RS Stock No. 849-5964
  • Mfr. Part No. FP-2
Each
SGD97.70(exc. GST)
In Stock
ABB Tmax XT Changeover Contact for use with Circuit Breaker
  • RS Stock No. 232-0184
  • Mfr. Part No. 1SDA066433R1 AUX-C 2Q+1SY 250V XT1..XT4
Each
SGD159.55(exc. GST)
In Stock
Better World
Schneider Electric iID RCCB, 100A, 2 Pole, 100mA, Type AC
  • RS Stock No. 806-7288
  • Mfr. Part No. A9R12291
Each
SGD193.03(exc. GST)
In Stock
Eaton 30A F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 852-7395
  • Mfr. Part No. AGX-30
Each
SGD3.66(exc. GST)
In Stock
ABB, Protecta MCCB 3P 63A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 831-9163
  • Mfr. Part No. 1SDA067414R1 XT1N 160 TMD 63-630 3p F F
Each
SGD287.48(exc. GST)
In Stock
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 4P 200A, Fixed Mount
  • RS Stock No. 232-0268
  • Mfr. Part No. 1SDA068069R1 XT3N 250 TMD 200A FF
Each
SGD1,317.26(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-524
  • Mfr. Part No. 3VA5112-1MU31-0AA0
Each
SGD1,437.92(exc. GST)
Temporarily out of stock
Siemens 400A Tag Fuse, 137 x 52mm, 1.25kV
  • RS Stock No. 300-039
  • Mfr. Part No. 3NB1234-3KK15
Each
SGD543.21(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 18 Way, 250 A
  • RS Stock No. 207-266
  • Mfr. Part No. SE54B250
Each
SGD1,517.95(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 2m, 40A, Canalis KBB Series
  • RS Stock No. 211-0391
  • Mfr. Part No. KBB40ED44203TW
Each
SGD413.24(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-761
  • Mfr. Part No. 3VA5195-6ED31-0AA0
Each
SGD473.29(exc. GST)
In Stock
Schurter 3.15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4230
  • Mfr. Part No. 8020.5016.G
Each (In a Pack of 10)
SGD1.205(exc. GST)
Temporarily out of stock
ABB F200 RCCB, 63A, 2 Pole, 100mA, Type A, 230/400V ac
  • RS Stock No. 177-5076
  • Mfr. Part No. 2CSF202201R2630 F202 A S-63/0,1
Each
SGD394.57(exc. GST)
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-077
  • Mfr. Part No. KV 8354 M
Each
SGD427.30(exc. GST)
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)
1
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