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

89 of 999+
In Stock
ABB Surge Protector, DIN Rail Mount
  • RS Stock No. 136-3878
  • Mfr. Part No. 1SNA198729R0100
Each (In a Pack of 5)
SGD1.696(exc. GST)
Limited stock
Better World
Schneider Electric 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690V ac
  • RS Stock No. 482-702
  • Mfr. Part No. DF102V
Each
SGD59.93(exc. GST)
In Stock
Littelfuse 100A Blue BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6747
  • Mfr. Part No. 153.5631.6101
Each (In a Pack of 5)
SGD4.87(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-454
  • Mfr. Part No. 3VA5215-7EC31-0AA0
Each
SGD1,826.33(exc. GST)
In Stock
Littelfuse 1A F Cartridge Fuse, 10 x 35mm
  • RS Stock No. 337-5278
  • Mfr. Part No. 0BLS001.T
Each (In a Pack of 5)
SGD23.902(exc. GST)
In Stock
Schneider Electric Multi9 M9F1 MCB, 2P, 16A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-006
  • Mfr. Part No. M9F10216
Each
SGD99.11(exc. GST)
Temporarily out of stock
ABB S301 MCB, 1P, 4A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-021
  • Mfr. Part No. 2CDS381001R0337
Each
SGD97.93(exc. GST)
In Stock
Mersen 2.5A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-846
  • Mfr. Part No. A085376Q
1 Box of 10
SGD22.56(exc. GST)
In Stock
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator, Canalis Series
  • RS Stock No. 130-551
  • Mfr. Part No. KSB32SG4
Each
SGD602.18(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 2P, 25A, Type Z, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-260
  • Mfr. Part No. 2CDS252001R0518
Each
SGD160.05(exc. GST)
In Stock
Eaton PFIM RCD, 16A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 922-8648
  • Mfr. Part No. 235423 PFIM-16/2/003-A-MW
Each
SGD256.77(exc. GST)
Temporarily out of stock
ABB S800U MCB, 4P, 80A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-334
  • Mfr. Part No. 2CCS864017R0627
Each
SGD1,236.99(exc. GST)
In Stock
RS PRO MCB, 3P, 32A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0208
Each
SGD50.55(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA
  • RS Stock No. 209-6929
  • Mfr. Part No. 3VA2140-6KP36-0AA0
Each
SGD2,527.68(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T XA MCB, 3P, 16A Curve C, 400V AC
  • RS Stock No. 239-9979
  • Mfr. Part No. A9PA2316
Each
SGD276.74(exc. GST)
Temporarily out of stock
Better World
ABB, XT4N MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-6615
  • Mfr. Part No. 1SDA068149R1 XT4N 160 Ekip I 63A FF
Each
SGD1,727.64(exc. GST)
In Stock
Eaton xPole MCB, 1+N, 16A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1076
  • Mfr. Part No. 264746 PLG4-C16/1N
Each
SGD20.41(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 150A, Breaking Capacity 65 kA, DIN Rail Mount
  • RS Stock No. 245-055
  • Mfr. Part No. NHGF36150U31XTW
Each
SGD3,362.79(exc. GST)
In Stock
Schurter PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 284-5158
  • Mfr. Part No. 0034.6019
Each (In a Pack of 10)
SGD0.957(exc. GST)
In Stock
ETI 6A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-957
  • Mfr. Part No. 2211003
Each (In a Pack of 5)
SGD1.796(exc. GST)
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