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

46580 Products showing for Fuses & Circuit Breakers

65 / 999+
Limited stock
Siemens 200A NH Fuse, NH1, 1kV, 110mm
  • RS Stock No. 396-180
  • Mfr. Part No. 3NE3225
Each (In a Pack of 3)
MYR1,035.96
In Stock
Eaton RCD, 20A, 2 Pole, 30mA, Type C
  • RS Stock No. 922-8733
  • Mfr. Part No. 236245 PKNM-20/1N/C/003-MW
Each
MYR850.64
In Stock
Better World
Schneider Electric Multi 9 MCB, 1P, 3A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9148
  • Mfr. Part No. M9F42103
Each
MYR588.38
In Stock
Sato Parts 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 372-1047
  • Mfr. Part No. F-100
Each (In a Pack of 5)
MYR10.45
In Stock
Siemens 25A Bottle Fuse Holder, 1P, 500V ac
  • RS Stock No. 202-7235
  • Mfr. Part No. 5SF1060
Each (In a Pack of 3)
MYR74.79
In Stock
Siemens 80A NH Fuse, NH00, 500V ac
  • RS Stock No. 397-420
  • Mfr. Part No. 3NA6824-7
Each (In a Pack of 3)
MYR41.557
In Stock
Littelfuse 12A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2832
  • Mfr. Part No. 0215012.TXP
Each (In a Pack of 10)
MYR3.021
In Stock
RS PRO Single Phase Industrial Surge Protector, 10kA, 1.3kV, DIN Rail Mount
  • RS Stock No. 101-749
Each
MYR243.75
In Stock
Better World
Schneider Electric NSX Spreader for use with Compact Nsx100/160/250, Easypact Cvs 100/160/250
  • RS Stock No. 221-1223
  • Mfr. Part No. LV431563
Each
MYR316.25
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 50A, Fixed Mount
  • RS Stock No. 254-6279
  • Mfr. Part No. C10B3TM050
Each
MYR2,849.98
In Stock
Siemens 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690V
  • RS Stock No. 225-5419
  • Mfr. Part No. 3NW7023
Each
MYR109.61
In Stock
Eaton 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 852-7351
  • Mfr. Part No. ATC-15
Each
MYR6.25
In Stock
Siemens 500A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6962
  • Mfr. Part No. 3NE1334-2
Each (In a Pack of 3)
MYR2,372.07
Being discontinued
RS PRO 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-429
Each (In a Pack of 10)
MYR1.348
In Stock
Mersen 25A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0614
  • Mfr. Part No. F1014581 / FR10GR69V25
Each
MYR44.50
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1+N, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1408
  • Mfr. Part No. 5SY4504-7
Each
MYR453.19
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 20A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 539-8245
  • Mfr. Part No. 2CDS211001R0204 SH201-C20
Each
MYR92.03
In Stock
ABB FH200 RCCB, 63A, 4 Pole, 30mA, Type AC, 230/400V ac
  • RS Stock No. 540-1666
  • Mfr. Part No. 2CSF204006R1630 FH204 AC-63/0,03
Each
MYR1,008.56
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 20A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2360
  • Mfr. Part No. A9F07320
Each
MYR347.18
Temporarily out of stock
Better World
ABB, XT2S MCCB 3P 12.5A, Fixed Mount
  • RS Stock No. 236-7489
  • Mfr. Part No. 1SDA067764R1 XT2S 160 MF 12.5 FF
Each
MYR1,790.21
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