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

229 / 999+
RS PRO 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-671
Each (In a Pack of 10)
MYR1.595
Better World
Schneider Electric Surge Protector, 5kA, DIN Rail Mount
  • RS Stock No. 776-3884
  • Mfr. Part No. A9L16295
Each
MYR2,545.15
RS PRO 1.6A FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 420-088
Each (In a Pack of 10)
MYR8.533
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 30mA, Type F, 400V ac
  • RS Stock No. 211-9644
  • Mfr. Part No. 5SV3346-3
Each
MYR2,295.24
Siemens 200A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 203-2052
  • Mfr. Part No. 3NA7240
Each (In a Pack of 3)
MYR133.75
Schurter 16A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 600V ac
  • RS Stock No. 167-6951
  • Mfr. Part No. 0751.0056
1 Bag of 20
MYR28.34
ETA Thermal Magnetic Circuit Breaker - 2210 Single Pole DIN Rail Mount, 1A Current Rating
  • RS Stock No. 282-8743
  • Mfr. Part No. 2210-T210-K0M1-H121-1A
Each
MYR242.92
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 173-9698
  • Mfr. Part No. 0031.8211
Each (In a Box of 100)
MYR3.245
Better World
Schneider Electric MCCB 2P 5A, Clip-On
  • RS Stock No. 178-8000
  • Mfr. Part No. LV426850
Each
MYR701.19
Littelfuse SMD Non Resettable Fuse 2A, 250V
  • RS Stock No. 895-1596P
  • Mfr. Part No. 0443002.DR
Each (Supplied on a Reel)
MYR6.95
Eaton Eaton xEffect SASY 60i Busbar
  • RS Stock No. 235-216
  • Mfr. Part No. 107203 BBT-CU-BAR500/720-50
Each (In a Pack of 6)
MYR158.583
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 4P 100A, Fixed Mount
  • RS Stock No. 221-0991
  • Mfr. Part No. LV430886
Each
MYR12,706.37
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 110 kA
  • RS Stock No. 209-6939
  • Mfr. Part No. 3VA2216-7MS32-0AA0
Each
MYR5,574.49
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3259
  • Mfr. Part No. A9DA2620
Each
MYR1,307.64
ABB 160A Tag Fuse, NH1, 500V
  • RS Stock No. 251-3464
  • Mfr. Part No. 1SCA022627R4310
1 Box of 3
MYR324.48
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS Stock No. 563-447
Each (In a Pack of 10)
MYR3.284
Eaton Fuse Holder Microswitch
  • RS Stock No. 182-1420
  • Mfr. Part No. MAI
Each
MYR175.41
RS PRO 500mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1597
Each (In a Pack of 10)
MYR5.72
Better World
ABB, XT4S MCCB 3P 20A, Fixed Mount
  • RS Stock No. 236-6741
  • Mfr. Part No. 1SDA068433R1 XT4S 160 MA 20 FF
Each
MYR2,798.41
Eaton 16A British Standard Fuse, 280V, 41.8mm
  • RS Stock No. 181-8460
  • Mfr. Part No. 16LET
Each (In a Box of 10)
MYR138.44
1
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