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

95 of 999+
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40H MCB, 3+N, 40A Curve C, 400V AC
  • RS Stock No. 238-3381
  • Mfr. Part No. A9P26440
Each
SGD587.19(exc. GST)
In Stock
Mersen 63A FF Cartridge Fuse, 22 x 58mm
  • RS Stock No. 136-0519
  • Mfr. Part No. D1018627 / FR22GR69V63T
Each (In a Box of 10)
SGD45.151(exc. GST)
In Stock
ABB FH200 RCCB, 40A, 4 Pole, 30mA, Type AC, 230V
  • RS Stock No. 540-1650
  • Mfr. Part No. 2CSF204006R1400 FH204 AC-40/0,03
Each
SGD173.02(exc. GST)
In Stock
Lovato ModuLo P1MB MCB, 2P, 1A Curve B, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5668
  • Mfr. Part No. P1MB2PB01
Each
SGD30.08(exc. GST)
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 2A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2803
  • Mfr. Part No. 2909903
Each
SGD94.81(exc. GST)
In Stock
Littelfuse 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3172
  • Mfr. Part No. 0KLK001.T
Each
SGD34.70(exc. GST)
In Stock
Schurter 10A PCB Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 866-4719
  • Mfr. Part No. 0031.3581
Each (In a Pack of 10)
SGD6.25(exc. GST)
In Stock
Eaton 30A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 854-8913
  • Mfr. Part No. FNQ-R-30
Each
SGD107.42(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 3P, 32A, Type A, 400V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 610-428
  • Mfr. Part No. 5SY4332-5
Each
SGD337.80(exc. GST)
In Stock
Eaton 100A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 182-1649
  • Mfr. Part No. 100NHM00B-690
Each
SGD46.25(exc. GST)
Temporarily out of stock
Eaton 40A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8478
  • Mfr. Part No. 40NHM000B-690
1 Box of 3
SGD36.62(exc. GST)
In Stock
Schneider Electric Resi9 R9PF MCB, 3P, 20A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8968
  • Mfr. Part No. R9PFC720
Each
SGD139.28(exc. GST)
In Stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 209-4937
  • Mfr. Part No. 3VA1120-3EF32-0AA0
Each
SGD632.05(exc. GST)
Temporarily out of stock
Hager NGT MCB, 3+N, 6A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4802
  • Mfr. Part No. NGT806
Each
SGD404.14(exc. GST)
Temporarily out of stock
Hager NFT MCB, 3+N, 6A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4747
  • Mfr. Part No. NFT806
Each
SGD292.66(exc. GST)
Temporarily out of stock
Eaton xEffect FAZ MCB, 3+N, 6A Curve B, 440V AC, 60V DC, 7.5 kA Breaking Capacity
  • RS Stock No. 255-804
  • Mfr. Part No. 241080 FAZT-B6/3N
Each
SGD365.01(exc. GST)
In Stock
Better World
Schneider Electric, Power Tag, 2mA, POWERTAG, 3W, Wired
  • RS Stock No. 248-3710
  • Mfr. Part No. A9XMC2D3
Each
SGD222.74(exc. GST)
Temporarily out of stock
nVent ERIFLEX ERIFLEX Busbar, 25mm Pitch
  • RS Stock No. 277-6093
  • Mfr. Part No. 550210
Each (In a Pack of 4)
SGD91.738(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 4P, 20A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2407
  • Mfr. Part No. M9F23420
Each
SGD202.15(exc. GST)
In Stock
Eaton xPole PXL, S200 MCB, 1P, 6A Curve B, 400V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 486-952
  • Mfr. Part No. 236027 PXL-B6/1
Each
SGD23.42(exc. GST)
1
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