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

168 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5207
  • Mfr. Part No. 3VA2325-6KP42-0AA0
Each
MYR16,675.33
In Stock
ABB S301 MCB, 1P, 6A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-726
  • Mfr. Part No. 2CDS381001R0064
Each
MYR560.86
In Stock
Legrand DX Range DX3 MCB, 2P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9487
  • Mfr. Part No. 4 077 84
Each
MYR532.91
In Stock
Mersen 25A FF Cartridge Fuse, 22 x 58mm
  • RS Stock No. 136-0515
  • Mfr. Part No. Z1018623 / FR22GR69V25T
Each (In a Box of 10)
MYR119.99
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 30A, Breaking Capacity 25 kA, Screw Mount
  • RS Stock No. 244-919
  • Mfr. Part No. BDL46030LU
Each
MYR2,771.26
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 3P, 20A Curve C, 6 kA Breaking Capacity
  • RS Stock No. 202-7154
  • Mfr. Part No. 5SL6320-7
Each
MYR418.03
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3+N, 63A, Type Z, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 203-806
  • Mfr. Part No. 2CDS383103R0608
Each
MYR5,009.09
Temporarily out of stock
ABB S302 MCB, 2P, 63A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-765
  • Mfr. Part No. 2CDS382001R0635
Each
MYR1,850.20
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 75A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-142
  • Mfr. Part No. 3RV2342-4KC10
Each
MYR2,997.26
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 1+N, 13A Curve B, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-838
  • Mfr. Part No. 2CDS271103R0135
Each
MYR666.46
In Stock
Littelfuse 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 769-0192
  • Mfr. Part No. 83000000005
Each (In a Pack of 5)
MYR8.414
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 6A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-777
  • Mfr. Part No. 2CDS273061R0377
Each
MYR2,894.05
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 1+N, 1.6A Curve D, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-844
  • Mfr. Part No. 2CDS271103R0971
Each
MYR1,037.40
In Stock
Schurter 16A PCB Mount Fuse Holder for 6.3 x 32mm Fuse, 400V ac
  • RS Stock No. 866-4750
  • Mfr. Part No. 0031.3822
Each (In a Pack of 10)
MYR15.375
Temporarily out of stock
Siemens SENTRON Long Rear Connection for use with 3VA1 250
  • RS Stock No. 269-7124
  • Mfr. Part No. 3VA9214-0QF00
Each (In a Pack of 4)
MYR131.835
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4868
  • Mfr. Part No. 3VA2580-7MN32-0AA0
Each
MYR29,060.10
Temporarily out of stock
Lovato Cover for use with Bus Bar Terminal
  • RS Stock No. 825-6129
  • Mfr. Part No. P1X9130
Each
MYR26.84
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 35 kA, Cable Mount
  • RS Stock No. 249-213
  • Mfr. Part No. 3VA6610-7KT36-0AA0
Each
MYR53,720.50
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-333
  • Mfr. Part No. 3VA6140-8HL31-2AA0
Each
MYR6,355.21
In Stock
Schneider Electric Acti9 Acti9 iC60 MCB, 2P, 500mA Curve D, 400V AC, 125V DC, 6000 A Breaking Capacity
  • RS Stock No. 287-5952
  • Mfr. Part No. A9F75270
Each
MYR773.19
1
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