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

206 / 999+
Hager RCBO, 25A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A, Hager Range
  • RS Stock No. 599-775
  • Mfr. Part No. ADX475C
Each
MYR2,891.76
Better World
Siemens SENTRON 5SL4 MCB, 1P, 4A Curve B, 10 kA Breaking Capacity
  • RS Stock No. 202-7171
  • Mfr. Part No. 5SL4104-6
Each
MYR120.92
RS PRO 6A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8089
Each (In a Pack of 50)
MYR2.095
Better World
Schneider Electric Compact Ins, Compact Insj, Compact Inv, Compact Nsx, Easypact Cvs Spreader for use with Compact Nsx
  • RS Stock No. 221-1234
  • Mfr. Part No. LV432491
Each
MYR704.93
Better World
Schneider Electric Acti9 1 Phase Busbar, 250 V, 440 V, 9mm Pitch
  • RS Stock No. 238-4080
  • Mfr. Part No. A9XPK707
Each
MYR1,698.21
Allen Bradley 140MT Extension Terminal for use with Contactor
  • RS Stock No. 273-2300
  • Mfr. Part No. 140MT-C-PSC23
Each
MYR60.06
ABB S303 MCB, 3P, 63A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-949
  • Mfr. Part No. 2CDS383001R0635
Each
MYR2,939.70
Better World
ABB, XT4L MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6824
  • Mfr. Part No. 1SDA068574R1 XT4L 160 Ekip LS/I 160A FF
Each
MYR8,551.31
Eaton 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 311-0015
  • Mfr. Part No. HTC-45M
Each (In a Pack of 5)
MYR22.25
Schurter SMD Non Resettable Fuse 3A, 32 V ac, 63V dc
  • RS Stock No. 173-7770
  • Mfr. Part No. 3413.0121.22.
1 Reel of 1000
MYR1,731.02
ABB 400A Tag Fuse, 150 x 51 x 72mm, 500V
  • RS Stock No. 250-4448
  • Mfr. Part No. 1SCA022697R9510
1 Box of 3
MYR539.18
Better World
Siemens SENTRON 5SY7 MCB, 3P, 63A Curve B, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8973
  • Mfr. Part No. 5SY7363-6
Each
MYR941.25
Eaton 2A Bolted Tag Fuse, 1.2 kV ac, 660V dc, 124mm
  • RS Stock No. 181-8435
  • Mfr. Part No. TAC2
Each (In a Box of 10)
MYR225.972
Schneider Electric, ComPacT MCCB 3P 1kA, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 346-737
  • Mfr. Part No. C100L350FM
Each
MYR82,820.94
Better World
ABB System Pro M Compact S200 MCB, 4P, 25A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7813
  • Mfr. Part No. 2CDS254001R0254 S204-C25
Each
MYR1,001.28
ABB 100A Tag Fuse, 79 x 30 x 60mm, 690V
  • RS Stock No. 250-4461
  • Mfr. Part No. 1SCA022700R9520
1 Box of 3
MYR159.40
Siemens SENTRON 5SL66 MCB, 4P, 50A Curve B, 440V AC, 62.5V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-388
  • Mfr. Part No. 5SL6650-6
Each
MYR1,021.18
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 32A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9909
  • Mfr. Part No. 3VA1132-6GF46-0AA0
Each
MYR2,389.56
ABB Transfer Switches - Accessories Voltage Sensing Connector for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9820
  • Mfr. Part No. 1SCA120153R1001
Each
MYR293.65
Better World
Schneider Electric Busbar Tap-Off Unit, Canalis Series
  • RS Stock No. 211-0398
  • Mfr. Part No. KBC16DCB226
Each (In a Pack of 10)
MYR203.908
1
206
2329
Results per page

Related links