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

46578 Products showing for Fuses & Circuit Breakers

324 / 999+
In Stock
Schneider Electric Acti9 Acti9 iC60 MCB, 1P, 25A Curve B, 500V AC, 72V DC, 240 V Breaking Capacity
  • RS Stock No. 458-794
  • Mfr. Part No. A9F93125
Each
MYR969.36
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4597
  • Mfr. Part No. 1SDA072856R1
Each
MYR34,915.67
In Stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 1A Current Rating
  • RS Stock No. 336-012
  • Mfr. Part No. 106-P30-000040-1A
Each
MYR103.06
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4302
  • Mfr. Part No. 1SDA072438R1
Each
MYR85,585.12
In Stock
Schneider Electric, ComPacT new generation Circuit breaker 4P 160A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 110-316
  • Mfr. Part No. C12B44V160B
Each
MYR12,689.43
Temporarily out of stock
Better World
Schneider Electric ComPact NSX Adapter for use with Compact NSX 400/630 circuit breakers
  • RS Stock No. 219-9408
  • Mfr. Part No. LV432585
Each
MYR428.53
Temporarily out of stock
ABB SU200 M MCB, 2P, 1A Curve K, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-079
  • Mfr. Part No. 2CDS272337R0217
Each
MYR1,571.96
In Stock
RS PRO 63A British Standard Fuse, A4, 550V ac, 94mm
  • RS Stock No. 521-2680
Each
MYR75.64
In Stock
ABB Current Transformer for use with S4, S5, S6, S7, T1, T2, T3, T4, T5, T6, T7, XT2, XT3, XT4, XT7-XT7M, XXT7-XT7M
  • RS Stock No. 250-4511
  • Mfr. Part No. 1SDA037395R1
Each
MYR2,961.52
Temporarily out of stock
Siemens 200A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2129
  • Mfr. Part No. 3NA7140
Each (In a Pack of 3)
MYR83.423
Temporarily out of stock
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-917
  • Mfr. Part No. 3VA6560-5JP36-2AA0
Each
MYR26,724.46
Temporarily out of stock
Eaton 25A Bolted Tag Fuse, E1, 240V ac
  • RS Stock No. 181-8570
  • Mfr. Part No. SSD25
1 Box of 20
MYR372.63
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 63A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9400
  • Mfr. Part No. 3VA1163-6ED36-0AA0
Each
MYR1,547.50
In Stock
Better World
Schneider Electric iC60 RCD, 40A, 30mA
  • RS Stock No. 734-9208
  • Mfr. Part No. A9Q11240
Each
MYR1,720.05
Temporarily out of stock
ABB F200 RCCB, 125A, 4 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 225-6122
  • Mfr. Part No. 2CSF204001R3950 F204 AC-125/0,3
Each
MYR7,233.93
In Stock
ETA Thermal Circuit Breaker - 3130 Single Pole 240V Voltage Rating Snap In, 2A Current Rating
  • RS Stock No. 212-2118
  • Mfr. Part No. 3130-F110-P7T1-W14QR7-2A
Each
MYR214.22
In Stock
Better World
Siemens 5sV3 RCCB, 25A, 2 Pole, 30mA, Type A, 24-125V
  • RS Stock No. 211-9630
  • Mfr. Part No. 5SV3312-6KK13
Each
MYR923.22
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 1P, 13A Curve K, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 200-142
  • Mfr. Part No. 2CDS271347R0447
Each
MYR758.33
Temporarily out of stock
Siemens Busbar Tap-Off Unit with Circuit Breaker, BD01 Series
  • RS Stock No. 213-2426
  • Mfr. Part No. BVP:034276
Each
MYR1,930.76
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-445
  • Mfr. Part No. 3VA5215-6EF41-0AA0
Each
MYR10,413.20
1
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