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

33 / 999+
RS PRO 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8088
Each (In a Pack of 50)
MYR1.963
Better World
Schneider Electric Acti9 Acti9 iDT40K MCB, 1+N, 16A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 238-3412
  • Mfr. Part No. A9P71616
Each
MYR170.35
Better World
Siemens, SENTRON MCCB 4P 250A, Fixed Mount
  • RS Stock No. 210-1692
  • Mfr. Part No. 3VA1225-1AA42-0AA0
Each
MYR3,252.87
Europa RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC, EUC7R Range
  • RS Stock No. 210-4739
  • Mfr. Part No. EUC7RC.16/1CA
Each
MYR338.01
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 16A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3382
  • Mfr. Part No. A9F54316
Each
MYR835.19
RS PRO 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-419
Each (In a Pack of 10)
MYR1.457
Schurter 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7801
  • Mfr. Part No. 0001.2511
Each (In a Bag of 10)
MYR3.151
SIBA 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3327
  • Mfr. Part No. 70-007-65/6.3A
Each (In a Pack of 10)
MYR1.295
Eaton 400A NH Fuse, NH2, 500V
  • RS Stock No. 703-8759
  • Mfr. Part No. 400NHG2B
Each
MYR147.68
Schneider Electric, Powerpact4 MCCB 1P 100A, Breaking Capacity 25 kA, Panel Mount
  • RS Stock No. 517-4875
  • Mfr. Part No. MGP1001L3
Each
MYR948.41
Schurter 6.3A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4246
  • Mfr. Part No. 8020.5019.G
Each (In a Pack of 10)
MYR3.468
Schneider Electric R9R RCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 654-672
  • Mfr. Part No. R9R22225
Each
MYR514.69
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 2A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 238-3409
  • Mfr. Part No. A9P71602
Each
MYR219.43
Socomec 4A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5263
  • Mfr. Part No. 60120004
Each (In a Pack of 10)
MYR5.86
RS PRO 4A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2472
Each (In a Pack of 5)
MYR19.742
Siemens 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 397-363
  • Mfr. Part No. 3NA3805
Each (In a Pack of 3)
MYR42.90
Eaton xEffect MCB, 1+N, 20A Curve C, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7093
  • Mfr. Part No. 278675 FAZ-C20/1N
Each
MYR375.05
Better World
Schneider Electric Acti9 Acti9 iDT40K MCB, 1+N, 10A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 238-3411
  • Mfr. Part No. A9P71610
Each
MYR170.35
Schneider Electric Acti 9 MCB, 3P, 16A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6158
  • Mfr. Part No. A9PA2716
Each
MYR1,080.97
Socomec 16A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 223-2795
  • Mfr. Part No. 60130016
Each (In a Pack of 10)
MYR6.12
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