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

181 / 999+
RS PRO 3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-649
Each (In a Pack of 10)
MYR1.963
Eaton 2A FF Ceramic Cartridge Fuse, 50 x 13.2mm
  • RS Stock No. 229-048
  • Mfr. Part No. 2D16Q
1 Pack of 10
MYR148.50
Littelfuse 0.25A Resettable Fuse, 240V dc
  • RS Stock No. 495-0735P
  • Mfr. Part No. LVR025K
Each (Supplied in a Bag)
MYR3.178
Siemens, SENTRON MCCB 3P 70A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 147-535
  • Mfr. Part No. 3VA5170-4ED31-0AA0
Each
MYR2,144.63
Rittal SZ Busbar
  • RS Stock No. 230-4854
  • Mfr. Part No. 2364000
Each
MYR610.09
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 40A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6094
  • Mfr. Part No. A9P22640
Each
MYR318.14
Better World
ABB System Pro M Compact S200 MCB, 3P, 2A, Type Z
  • RS Stock No. 237-3240
  • Mfr. Part No. 2CDS253001R0278 S203 Z 2A - 10 KA
Each
MYR907.72
Eaton 50A Cartridge Fuses, 14 x 51mm
  • RS Stock No. 229-202
  • Mfr. Part No. C14M50S
1 Pack of 10
MYR444.17
Schneider Electric Acti9 Acti9 iC60 MCB, 4P, 4A Curve K, 70 KA Breaking Capacity
  • RS Stock No. 214-746
  • Mfr. Part No. A9F95404
Each
MYR4,753.15
ABB F200 RCCB, 80A, 4 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 225-6135
  • Mfr. Part No. 2CSF204101R3800 F204 A-80/0,3
Each
MYR1,441.75
Siemens 100A Centred Tag Fuse, NH00, 500V ac
  • RS Stock No. 203-2012
  • Mfr. Part No. 3NA7830-7
Each (In a Pack of 3)
MYR39.723
Schneider Electric, PowerPact Circuit breaker 3P 30A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 357-127
  • Mfr. Part No. BDL36030LU
Each
MYR3,750.98
Schneider Electric, ComPacT New generation MCCB 4P 40A, Breaking Capacity 440 V, Fixed Mount
  • RS Stock No. 205-134
  • Mfr. Part No. C10N47E040
Each
MYR32,558.93
Eaton 125mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7106
  • Mfr. Part No. MDL-1-8-R
Each
MYR30.61
SENTRON Mounting Base for use with 3VA58/59, 3VA68/69 Series
  • RS Stock No. 263-846
  • Mfr. Part No. 3VA9873-0WN00
Each
MYR11,026.55
Allen Bradley 140MT Lockable Twist Knob for use with Motor Circuit Protectors
  • RS Stock No. 273-2291
  • Mfr. Part No. 140MT-C-KN
Each
MYR18.13
Better World
Schneider Electric Linergy 3 Phase Busbar, 690V
  • RS Stock No. 221-0903
  • Mfr. Part No. GV2G272
Each
MYR130.87
Schneider Electric PowerPact J Nut for use with Circuit Breaker
  • RS Stock No. 438-902
  • Mfr. Part No. S37444
1 Pack of 3
MYR589.89
ETA Thermal Circuit Breaker - 1180 Single Pole 250V Voltage Rating DIN Rail Mount, 0.5A Current Rating
  • RS Stock No. 458-8661
  • Mfr. Part No. 1180-01-0.5A
Each
MYR79.08
RS PRO SMD Non-Resettable Surface Mount Fuse 10A, 63V
  • RS Stock No. 252-2155
Each (In a Pack of 50)
MYR1.464
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