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

275 / 999+
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 20A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9153
  • Mfr. Part No. A9F77320
Each
MYR974.50
Last RS stock
Contactum MCB, 1P, 32A Curve B, 250V AC, 6 kA Breaking Capacity
  • RS Stock No. 184-9060
  • Mfr. Part No. CPB32
Each
MYR17.13
In Stock
Eaton 110 V dc, 250V ac Auxiliary Release Shunt trip for use with FAZ Series MCB/RCBO
  • RS Stock No. 922-6958
  • Mfr. Part No. 262414 FAZ-XAM002
Each
MYR265.81
In Stock
SIBA 80A NH Fuse, NH000, 500V ac
  • RS Stock No. 421-570
  • Mfr. Part No. 20-000-04/80A
Each
MYR222.51
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 1P, 20A Curve B, 6 kA Breaking Capacity
  • RS Stock No. 202-7202
  • Mfr. Part No. 5SL6120-6
Each
MYR93.69
Temporarily out of stock
ABB AC Switch Disconnectors Accessories Detachable Neutral Clamp for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9706
  • Mfr. Part No. 1SCA104162R1001
Each
MYR1,910.25
In Stock
Siemens 200A Bolted Tag Fuse, NH000, 690V
  • RS Stock No. 210-6983
  • Mfr. Part No. 3NE8725-1
Each (In a Pack of 10)
MYR297.447
In Stock
RS PRO 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3495
Each (In a Pack of 10)
MYR1.811
Temporarily out of stock
Schneider Electric Resi9 Electronic Circuit Breaker 32A Resi9, Clip-On Type C
  • RS Stock No. 429-450
  • Mfr. Part No. R9PDCS32
Each
MYR3,691.18
In Stock
Eaton xEffect MCB, 3+N, 6A Curve D
  • RS Stock No. 230-1057
  • Mfr. Part No. 177479 FAZ6-D6/3N
Each
MYR652.81
Temporarily out of stock
Littelfuse 80A Bolted Tag Fuse, 32V, 30mm
  • RS Stock No. 252-5755
  • Mfr. Part No. 0498080.H
Each (In a Box of 100)
MYR10.524
Temporarily out of stock
Schneider Electric CompacT Cover Frame for use with ComPacT NS630b
  • RS Stock No. 654-976
  • Mfr. Part No. C080N3WM
Each
MYR10,641.52
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 50A Curve C, 400V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9289
  • Mfr. Part No. A9F77450
Each
MYR2,298.73
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 3 channels
  • RS Stock No. 155-834
  • Mfr. Part No. 3VA2450-0MN32-0AA0
Each
MYR23,149.13
Temporarily out of stock
20A Fuse Holder for 25.4 x 13 x 50mm Fuse, 550V ac
  • RS Stock No. 263-118
  • Mfr. Part No. SSC/LINK
1 Pack of 10
MYR100.17
Temporarily out of stock
Better World
Schneider Electric ComPact NSX, Easy Pact CVS Fixing Screws for use with ComPact NSX 400/640, Easy Pact CVS 400/630
  • RS Stock No. 219-9406
  • Mfr. Part No. LV432552
Each
MYR93.73
Temporarily out of stock
Hager NFT MCB, 3+N, 10A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4749
  • Mfr. Part No. NFT810
Each
MYR845.51
Temporarily out of stock
Eaton IZMX40N4-V16W-1 Electronic Circuit Breaker 1.6kA , DIN Rail
  • RS Stock No. 132-883
  • Mfr. Part No. 183753 IZMX40N4-V16W-1
Each
MYR72,765.13
Temporarily out of stock
Siemens SENTRON Function Tester for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-715
  • Mfr. Part No. 3VW9011-0AT31
Each
MYR3,411.17
In Stock
ABB RCBO, 16A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5098
  • Mfr. Part No. 2CSR254001R1164
Each
MYR1,535.03
1
275
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