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

46596 Products showing for Fuses & Circuit Breakers

16 / 999+
Eaton 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1161
  • Mfr. Part No. S500-2.5-R
Each (In a Pack of 10)
MYR0.802
RS PRO 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8121
Each (In a Pack of 20)
MYR3.217
Littelfuse 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8067
  • Mfr. Part No. 0219004.MXABP
Each (In a Bag of 10)
MYR3.477
Schurter 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 269-3858
  • Mfr. Part No. 7010.3470
Each
MYR4.50
Eaton xEffect MCB, 1P, 2A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6882
  • Mfr. Part No. 102080 FAZ-C2/1-NA
Each
MYR269.71
RS PRO 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-429
Each (In a Pack of 10)
MYR1.348
Schurter 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7804
  • Mfr. Part No. 0001.2513
Each (In a Bag of 10)
MYR2.66
Schneider Electric Acti9 iID RCCB, 100A, 4 Pole, 30mA, Type A, 380 → 415V ac
  • RS Stock No. 654-690
  • Mfr. Part No. A9R21491
Each
MYR3,961.19
RS PRO 4A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6085
Each (In a Pack of 10)
MYR2.992
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 10A Curve C, 400V AC
  • RS Stock No. 238-3365
  • Mfr. Part No. A9P22310
Each
MYR649.45
ETA REX12 Electronic Circuit breaker 4A 24V REX12-T, 1 channels , DIN Rail Mount
  • RS Stock No. 175-0366
  • Mfr. Part No. REX12-TA1-107-DC24V-4A
Each
MYR207.66
Eaton xEffect MCB, 2P, 15A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3504
  • Mfr. Part No. 278782 FAZ-D15/2
Each
MYR426.54
Better World
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8644
  • Mfr. Part No. EZ9D16810
Each
MYR163.60
Littelfuse 2.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3502
  • Mfr. Part No. 021902.5MXAP
Each (In a Pack of 10)
MYR3.601
Schurter 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 269-3855
  • Mfr. Part No. 7010.3440
Each
MYR4.80
Siemens 10A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2062
  • Mfr. Part No. 3NW6003-1
Each (In a Pack of 10)
MYR23.77
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
Siemens 20A Diazed Fuse, gG, 500/440V ac/dc
  • RS Stock No. 163-281
  • Mfr. Part No. 5SB2711
1 Pack of 25
MYR143.62
Hager NFN MCB, 2P, 10A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4712
  • Mfr. Part No. NFN210
Each
MYR481.97
Eaton 25A Clear Blade Car Fuse, 32V dc
  • RS Stock No. 852-7354
  • Mfr. Part No. ATC-25
Each
MYR4.90
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