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

46580 Products showing for Fuses & Circuit Breakers

61 / 999+
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2062
  • Mfr. Part No. 3120-N521-H7T1-W01D-10A
Each
MYR206.12
RS PRO 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-615
Each (In a Pack of 10)
MYR2.194
ETI 35A DIII Diazed Fuse, E33 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-743
  • Mfr. Part No. 2313401
Each (In a Pack of 5)
MYR7.722
Littelfuse 315mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8029
  • Mfr. Part No. 0213.315MXP
Each (In a Bag of 10)
MYR3.624
Eaton 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9407
  • Mfr. Part No. S500-500-R
1 Bag of 1000
MYR1,489.60
Eaton 35A 36 x 16mm Diazed Fuse, 400V ac
  • RS Stock No. 259-853
  • Mfr. Part No. 288943 Z-D02/SE-35
1 Pack of 12
MYR28.60
Eaton 355A British Standard Fuse, MMT, 690 V, 700 V, 85mm
  • RS Stock No. 182-1495
  • Mfr. Part No. 355MMT
Each
MYR872.13
Eaton 200A Rail Mount Fuse Holder for B2 Fuse, 1P, 690V ac
  • RS Stock No. 415-092
  • Mfr. Part No. RS200H
Each
MYR1,416.37
Siemens 50A Fuse Holder for 14 x 51mm Fuse, 1P, 690V ac
  • RS Stock No. 269-8379
  • Mfr. Part No. 3NW7111
Each
MYR118.11
Eaton 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 1P, 690 V ac, 750V dc
  • RS Stock No. 182-1536
  • Mfr. Part No. CH141DMSU-F
Each (In a Box of 6)
MYR162.395
RS PRO PC Board Non Resettable Fuse, Axial 750mA, 125V ac/dc
  • RS Stock No. 764-9466P
Each (Supplied on a Reel)
MYR2.516
Better World
Schneider Electric iID RCCB, 100A, 4 Pole, 300mA, Type A-SI, 415V ac
  • RS Stock No. 248-3699
  • Mfr. Part No. A9R34491
Each
MYR2,679.22
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
ABB Earth & Neutral Terminal Bar for use with MCB
  • RS Stock No. 232-0024
  • Mfr. Part No. GJI2320072R0017 SZ-KLB 16
1 Box of 1
MYR64.53
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 60A
  • RS Stock No. 221-0897
  • Mfr. Part No. BDL36060LU
Each
MYR1,961.83
Schneider Electric ComPacT Electronic Circuit Breaker 63A 250V ComPacT NSX, 2 channels , Fixed
  • RS Stock No. 339-518
  • Mfr. Part No. C10M1TM063
Each
MYR1,729.47
RS PRO SMD Non-Resettable Surface Mount Fuse 12A, 63V
  • RS Stock No. 252-2156
Each (On a Tape of 4000)
MYR1.079
Eaton xEffect MCB, 3P, 4A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 624-0383
  • Mfr. Part No. 278865 FAZ-C4/3
Each
MYR692.92
Eaton 125mA Cartridge Fuse, 10 x 126mm
  • RS Stock No. 849-5563
  • Mfr. Part No. HVJ-1-8
Each
MYR409.14
Schneider Electric Nsx100...250, Nsx400...630 LCD display for use with Micrologic 5 Trip Unit
  • RS Stock No. 221-1213
  • Mfr. Part No. LV429483
Each
MYR1,278.38
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