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

46579 Products showing for Fuses & Circuit Breakers

100 / 999+
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 2A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3436
  • Mfr. Part No. A9F74102
Each
MYR313.90
In Stock
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS Stock No. 776-2831
  • Mfr. Part No. A9XPT920
Each
MYR165.18
Temporarily out of stock
RS PRO 160mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8048
1 Box of 1000
MYR679.15
In Stock
SIBA 16A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3337
  • Mfr. Part No. 70-007-65/16A
Each (In a Pack of 10)
MYR1.891
Temporarily out of stock
ABB MCCB 3P 160A, Breaking Capacity 25 kA
  • RS Stock No. 192-0818
  • Mfr. Part No. 1SDA067399R1
Each
MYR3,320.45
Temporarily out of stock
Eaton 160mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9412
  • Mfr. Part No. S500-160-R
1 Bag of 1000
MYR1,927.73
In Stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 16A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2074
  • Mfr. Part No. 5SY4316-6
Each
MYR421.12
Temporarily out of stock
Schneider Electric, ComPacT New generation MCCB 4P 400A, Breaking Capacity 800 → 1000 V, Fixed Mount
  • RS Stock No. 205-228
  • Mfr. Part No. C40K42D400
Each
MYR24,346.22
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, System Pro M Compact Range
  • RS Stock No. 201-6953
  • Mfr. Part No. 2CSR255180R1164 DS201 C16 A30
Each
MYR1,034.45
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS Stock No. 189-5336
  • Mfr. Part No. E1062696 / CMC103
Each
MYR111.68
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve K, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7999
  • Mfr. Part No. 2CDS252001R0427 S202-K10
Each
MYR388.61
In Stock
Dehn Stainless Steel Lightning Earth Clamp Nominal Rod dia. 8-10mm
  • RS Stock No. 786-9358
  • Mfr. Part No. M8 UNI PV
Each
MYR112.91
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 226-0490
  • Mfr. Part No. 37005000000
Each (In a Pack of 10)
MYR4.138
In Stock
Eaton 100A British Standard Fuse, A4, 500V ac, 94mm
  • RS Stock No. 413-399
  • Mfr. Part No. CEO100
Each
MYR246.94
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 63A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9270
  • Mfr. Part No. A9F77363
Each
MYR2,352.23
In Stock
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-6001
Each (In a Pack of 10)
MYR1.719
In Stock
RS PRO 5A FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 420-117
Each (In a Pack of 10)
MYR6.776
In Stock
Eaton 32A Rail Mount Fuse Holder for F1 Fuse, 1P, 550V ac
  • RS Stock No. 415-339
  • Mfr. Part No. SC32H-D
Each
MYR62.07
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 8A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2796
  • Mfr. Part No. 2908262
Each
MYR245.44
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 2A, 125V ac/dc
  • RS Stock No. 541-3287
  • Mfr. Part No. 251002.NRT1L
Each (In a Pack of 10)
MYR5.356
1
100
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