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

47305 Products showing for Fuses & Circuit Breakers

4 of 999+
Littelfuse Phosphor Bronze PCB Mount Fuse Clip for 5 x 20mm Cartridge Fuse
  • RS Stock No. 787-4173
  • Mfr. Part No. 52100001009
Each (In a Pack of 10)
TWD6.10(exc. GST)
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 20A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9135
  • Mfr. Part No. A9F77220
Each
TWD2,749.00(exc. GST)
Eaton 10A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 414-623
  • Mfr. Part No. NIT10
Each (In a Pack of 5)
TWD237.80(exc. GST)
Better World
ABB SN201 MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 231-9970
  • Mfr. Part No. 2CSS255101R0044 SN201-C4 -
Each
TWD1,360.00(exc. GST)
Legrand DX Range DX3 MCB, 1P, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9663
  • Mfr. Part No. 4 076 55
Each
TWD1,433.00(exc. GST)
Mersen 10A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2785
  • Mfr. Part No. H213102
1 Box of 10
TWD1,174.00(exc. GST)
Better World
Siemens Sentron 5SY4 MCB, 2P, 16A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 772-1319
  • Mfr. Part No. 5SY4216-7
Each
TWD2,573.00(exc. GST)
Eaton xPole - PXL PXL MCB, 1P, 32A Curve C, 440V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 253-929
  • Mfr. Part No. 236690 PXL-C32-DC
Each
TWD3,280.00(exc. GST)
Better World
Siemens Sentron 5SY6 MCB, 1P, 4A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4951
  • Mfr. Part No. 5SY6104-7
Each
TWD773.00(exc. GST)
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 6A Curve C, 277V AC
  • RS Stock No. 256-6797
  • Mfr. Part No. M9F52206
Each
TWD8,672.00(exc. GST)
Better World
Siemens SENTRON 5SL6 MCB, 1P, 13A Curve C, 6 kA Breaking Capacity
  • RS Stock No. 202-7219
  • Mfr. Part No. 5SL6113-7
Each
TWD690.00(exc. GST)
Siemens SENTRON 3 Phase Busbar, 230V, 26.5mm Pitch
  • RS Stock No. 187-5231
  • Mfr. Part No. 5ST3777-0
Each
TWD10,186.00(exc. GST)
RS PRO 40A British Standard Fuse, A3, 550V ac, 73.5mm
  • RS Stock No. 521-2630
Each (In a Pack of 5)
TWD333.40(exc. GST)
Littelfuse 10A Red Blade Car Fuse, 32V dc
  • RS Stock No. 787-4101P
  • Mfr. Part No. 0287010.PXCN
Each (Supplied in a Bag)
TWD8.60(exc. GST)
Littelfuse SMD Non Resettable Fuse 10A, 125V
  • RS Stock No. 738-2867
  • Mfr. Part No. 0154010.DR
Each (In a Pack of 10)
TWD68.10(exc. GST)
Socomec 40A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 122-5276
  • Mfr. Part No. 60220040
Each (In a Pack of 10)
TWD90.80(exc. GST)
RS PRO PC Board Non Resettable Fuse, Axial 3A, 250V ac
  • RS Stock No. 764-9598
Each (In a Pack of 10)
TWD6.70(exc. GST)
SIBA 16A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 421-637
  • Mfr. Part No. 20-000-13/16E1
Each (In a Pack of 3)
TWD241.00(exc. GST)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 50A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3587
  • Mfr. Part No. A9F55350
Each
TWD5,254.00(exc. GST)
Schurter 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 600V ac
  • RS Stock No. 712-4796P
  • Mfr. Part No. 0091.0002
Each (Supplied in a Box)
TWD893.00(exc. GST)
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