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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

194 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3674
  • Mfr. Part No. 1SDA071648R1
Each
MYR64,862.63
In Stock
Eaton 125A Bolted Tag Fuse, 31 x 91mm, 415V ac
  • RS Stock No. 182-1819
  • Mfr. Part No. ODD125
Each
MYR178.50
In Stock
Littelfuse 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4331
  • Mfr. Part No. 0217.400MXP
Each (In a Pack of 10)
MYR1.274
In Stock
ABB RCBO, 8A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6954
  • Mfr. Part No. 2CSR255180R1084 DS201 C8 A30
Each
MYR999.15
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9897
  • Mfr. Part No. 1SDA070730R1
Each
MYR48,594.99
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 13A Curve B, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-100
  • Mfr. Part No. 2CDS272001R0135 S202M-B13
Each
MYR336.39
Temporarily out of stock
Siemens ALPHA Kit
  • RS Stock No. 213-2413
  • Mfr. Part No. 8GK9100-0KK00
Each
MYR131.30
Temporarily out of stock
ABB 250A Tag Fuse, NH1, 690V
  • RS Stock No. 250-4470
  • Mfr. Part No. 1SCA022701R0370
1 Box of 3
MYR423.82
Temporarily out of stock
Better World
ABB, XT4S MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-6781
  • Mfr. Part No. 1SDA068507R1 XT4S 160 Ekip LSIG 63A FF
Each
MYR11,316.32
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3450
  • Mfr. Part No. 1SDA071392R1
Each
MYR35,202.66
In Stock
Schurter 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7826
  • Mfr. Part No. 0034.1513
Each (In a Bag of 10)
MYR1.767
Temporarily out of stock
Mersen 1.25A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-882
  • Mfr. Part No. S090544Q
1 Box of 10
MYR36.46
In Stock
Eaton 45A Centred Tag Fuse, 600V
  • RS Stock No. 854-9008
  • Mfr. Part No. LPJ-45SP
Each
MYR426.65
In Stock
Mersen 5A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2941
  • Mfr. Part No. X1014573
1 Box of 10
MYR843.71
In Stock
Schneider Electric Surge Arrester, 50kA, 350V ac, Clip-On Mount
  • RS Stock No. 288-7105
  • Mfr. Part No. A9L16282
Each
MYR3,963.00
Temporarily out of stock
Siemens, SENTRON MCCB 1P 60A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-678
  • Mfr. Part No. 3VA5160-4ED11-1AA0
Each
MYR1,080.58
In Stock
Better World
Schneider Electric RCBO, 16A Current Rating, 3P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3323
  • Mfr. Part No. A9DS1716
Each
MYR2,100.14
Limited stock
Limitor Thermal Fuse +80°C 2.5 A, 250V ac
  • RS Stock No. 204-7427
  • Mfr. Part No. Q82 A 80 05 100
Each
MYR28.46
Limited stock
Limitor Thermal Fuse +55°C 2.5 A, 250V ac
  • RS Stock No. 204-7382
  • Mfr. Part No. Q82 A 55 05 100
Each
MYR24.31
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 6A Curve B, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2115
  • Mfr. Part No. A9F06206
Each
MYR276.58
1
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