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

46604 Products showing for Fuses & Circuit Breakers

15 / 999+
Eaton 315A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 703-8746
  • Mfr. Part No. 315NHG2B
Each
MYR115.55
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 16A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9065
  • Mfr. Part No. A9F77216
Each
MYR565.35
Eaton 300mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7143
  • Mfr. Part No. MDL-3-10-R
Each
MYR5.29
Littelfuse 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 542-1250
  • Mfr. Part No. 021806.3MXP
Each (In a Pack of 10)
MYR3.726
Bulgin 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 512-6006
  • Mfr. Part No. FX0419
Each
MYR59.65
ABB for use with Moving Part Plug-In Three-Pole XT1
  • RS Stock No. 192-0869
  • Mfr. Part No. 1SDA066276R1
Each
MYR304.08
SIBA 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3324
  • Mfr. Part No. 70-007-65/5A
Each (In a Pack of 10)
MYR1.782
RS PRO 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9888
Each (In a Pack of 10)
MYR2.41
Schneider Electric, ComPacT NSX MCCB 3P 50A, Fixed Mount
  • RS Stock No. 254-6271
  • Mfr. Part No. C103MA050
Each
MYR868.37
Littelfuse 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2788
  • Mfr. Part No. 0218001.MXP
Each (In a Pack of 10)
MYR3.079
Mersen 30A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0621
  • Mfr. Part No. G1014582 / FR10GR69V30
Each
MYR76.62
Littelfuse 250A Panel Mount Fuse Block
  • RS Stock No. 878-3946
  • Mfr. Part No. 02980900Z
Each
MYR97.69
Eaton 20A T Cartridge Fuse, 21 x 57mm
  • RS Stock No. 773-3542
  • Mfr. Part No. LPJ-20SP
Each
MYR340.38
Eaton xPole MCB, 2P, 10A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4358
  • Mfr. Part No. 242401 PLSM-C10/2-MW
Each
MYR389.98
Better World
Schneider Electric ID RCCB, 40A, 4 Pole, 30mA, Type AC, 415V ac
  • RS Stock No. 214-2097
  • Mfr. Part No. M9R11440
Each
MYR1,163.61
RS PRO 2A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8045
Each (In a Box of 500)
MYR3.555
Eaton 160A NH Fuse, NH0, 500V ac
  • RS Stock No. 181-8535
  • Mfr. Part No. 160NHG0B
1 Box of 3
MYR109.72
Littelfuse 50A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS Stock No. 226-0844
  • Mfr. Part No. 157.5701.5501
Each
MYR43.72
Siemens 25A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2174
  • Mfr. Part No. 3NA7810
Each (In a Pack of 3)
MYR55.59
RS PRO 4A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2472
Each (In a Pack of 5)
MYR19.742
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