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

46580 Products showing for Fuses & Circuit Breakers

57 / 999+
Sensata Airpax Airpax Thermal Circuit Breaker - PR11 Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0433
  • Mfr. Part No. PR11-2-10.0A-XX-V
Each
MYR103.46
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 782-8038
  • Mfr. Part No. W58-XB1A4A-6
Each
MYR42.47
Better World
Schneider Electric Acti 9 iC60L MCB, 3P, 32A Curve C, 15 kA Breaking Capacity
  • RS Stock No. 219-9286
  • Mfr. Part No. A9F94332
Each
MYR1,648.21
Eaton IKA Standard Distribution Board Distribution Board
  • RS Stock No. 125-765
  • Mfr. Part No. 174209 IKA-1/18-OT
Each
MYR450.17
Schneider Electric PowerLogic Mounting Hardware for use with PowerLogic PM5000 PM5560 Power Meter
  • RS Stock No. 654-535
  • Mfr. Part No. METSEPM55HK
Each
MYR258.56
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4200
  • Mfr. Part No. 1SDA072319R1
Each
MYR53,060.99
Eaton xEffect MCB, 2P, 5A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3380
  • Mfr. Part No. 102163 FAZ-C5/2-NA
Each
MYR385.23
Schurter OG Tin Plated Bronze PCB Mount Fuse Clip for 5 x 20mm Fuse Clip Fuse
  • RS Stock No. 269-3795
  • Mfr. Part No. 0751.0099
Each
MYR1.77
Mersen 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 270-3066
  • Mfr. Part No. K222097
Each (In a Box of 3)
MYR40.253
Phoenix Contact Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 207-2731
  • Mfr. Part No. 2906798
Each
MYR481.86
Hager 2 Phase Busbar
  • RS Stock No. 144-4830
  • Mfr. Part No. KB263A
Each
MYR136.06
Schurter SMD Non Resettable Fuse 1A, 32 V ac, 63V dc
  • RS Stock No. 665-7340P
  • Mfr. Part No. 3413.0115.22
Each (Supplied on a Reel)
MYR2.986
Mersen 1A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7016
  • Mfr. Part No. F217171
Each (In a Pack of 10)
MYR16.171
RS PRO PC Board Non Resettable Fuse, Radial 4A, 250V ac
  • RS Stock No. 611-0406
Each (In a Pack of 10)
MYR4.134
Mersen 125A NH Fuse, NH00, 500V ac
  • RS Stock No. 375-9626
  • Mfr. Part No. R201863
Each (In a Pack of 3)
MYR55.303
Eaton 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 600V
  • RS Stock No. 225-8212
  • Mfr. Part No. BK-HVI-R
1 Bag of 20
MYR4,138.67
Littelfuse SMD Non Resettable Fuse 1A, 125V ac
  • RS Stock No. 769-3719
  • Mfr. Part No. 0451001.NRL
Each (In a Pack of 10)
MYR6.692
Sato Parts 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 372-1047
  • Mfr. Part No. F-100
Each (In a Pack of 5)
MYR10.45
ABB, Formula DSA MCCB 1P 125A, Fixed Mount
  • RS Stock No. 237-6137
  • Mfr. Part No. 1SDA066687R1
Each
MYR775.72
Better World
Schneider Electric Circuit Trip for use with Acti 9 Isobar A Type Distribution Boards, Acti9 Isobar B Type Distribution
  • RS Stock No. 134-6005
  • Mfr. Part No. SEA9TB1001
Each
MYR93.81
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