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

279 / 999+
In Stock
Hager Electronic Circuit Breaker 16A MFS, 1 channels
  • RS Stock No. 251-2068
  • Mfr. Part No. MFS716
Each (In a Pack of 12)
MYR124.869
Temporarily out of stock
Better World
Schneider Electric 4A Cartridge Fuse, 8.5 x 32mm
  • RS Stock No. 219-9035
  • Mfr. Part No. DF2BA0400
Each (In a Pack of 10)
MYR49.153
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6068
  • Mfr. Part No. 3VA2163-5HN46-0AA0
Each
MYR4,742.20
Temporarily out of stock
Socomec 6A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 179-9658
  • Mfr. Part No. 60520006
Each (In a Box of 10)
MYR28.404
In Stock
ABB System Pro M Compact S200M MCB, 3P, 6A Curve B, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-6061
  • Mfr. Part No. 2CDS273001R0065 S203M-B6
Each
MYR536.67
Temporarily out of stock
Eaton IZMX16B3-V06W-1 Electronic Circuit Breaker 630A , DIN Rail
  • RS Stock No. 127-711
  • Mfr. Part No. 183341 IZMX16B3-V06W-1
Each
MYR22,699.47
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 6A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9123
  • Mfr. Part No. M9F22206
Each
MYR673.49
Being discontinued
RS PRO 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-362
Each (In a Pack of 10)
MYR2.953
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Radial 10mA, 125V ac/dc
  • RS Stock No. 878-1401
  • Mfr. Part No. 0273.010V
Each (In a Pack of 5)
MYR199.064
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 25A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-7974
  • Mfr. Part No. LV426770
Each
MYR5,446.18
In Stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 80A Curve B
  • RS Stock No. 221-0880
  • Mfr. Part No. A9N18413
Each
MYR1,665.61
Temporarily out of stock
Better World
Siemens Surge Protector, 9.75kA, Surface Mount Mount
  • RS Stock No. 213-1120
  • Mfr. Part No. 3RT2916-1PA2
Each
MYR329.67
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 260-9412
  • Mfr. Part No. C10B4TM025
Each
MYR3,410.12
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 13A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6487
  • Mfr. Part No. 5SL4313-8
Each
MYR699.47
Temporarily out of stock
32A Fuse Holder for 77 x 48 x 26mm Fuse, 1P, 550V ac
  • RS Stock No. 262-981
  • Mfr. Part No. 32NNSFGREEN FUSE HOLDER 32A 550V UNIT GREEN
1 Pack of 10
MYR814.33
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 1+N, 1.6A, Type A, 5 kA Breaking Capacity
  • RS Stock No. 217-6966
  • Mfr. Part No. 5SY4515-5
Each
MYR489.01
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IELHK111 3 Pole 480V ac Voltage Rating Panel Mount, 35A Current Rating
  • RS Stock No. 275-0244
  • Mfr. Part No. IELHK111-1-62F-35.0-ABE-01-V
1 Box of 5
MYR5,969.21
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 55 kA
  • RS Stock No. 210-1678
  • Mfr. Part No. 3VA1180-5EE32-0AA0
Each
MYR2,386.77
Temporarily out of stock
Siemens SENTRON 5SJ4160 MCB, 1P, 60A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-790
  • Mfr. Part No. 5SJ4160-8HG40
Each
MYR700.61
In Stock
Mersen Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 179-3083
  • Mfr. Part No. 83230512 / STMT23-10K320V-SP-SF
Each
MYR390.92
1
279
2329
Results per page

Related links