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

46604 Products showing for Fuses & Circuit Breakers

1 / 999+
Hager NFN MCB, 4P, 16A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4722
  • Mfr. Part No. NFN416
Each
MYR917.16
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
RS PRO 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5991
Each (In a Pack of 10)
MYR1.976
Littelfuse 1A Black Blade Car Fuse, 32V dc
  • RS Stock No. 787-4110
  • Mfr. Part No. 0287001.PXCN
Each (In a Pack of 10)
MYR1.663
Better World
Siemens SENTRON 5SY6 MCB, 2P, 20A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 209-6016
  • Mfr. Part No. 5SY6220-7
Each
MYR332.28
Better World
Schneider Electric Surge Protector, 200A, <3.9kV, DIN Rail Mount
  • RS Stock No. 219-8276
  • Mfr. Part No. A9L40281
Each
MYR667.70
Littelfuse 70A Tan Blade Car Fuse, 32V dc
  • RS Stock No. 219-3609
  • Mfr. Part No. 0299070.TXN
Each (In a Pack of 10)
MYR11.21
Siemens 20A Diazed Fuse, gG, 500/440V ac/dc
  • RS Stock No. 163-281
  • Mfr. Part No. 5SB2711
1 Pack of 25
MYR143.62
Littelfuse 315mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8048
  • Mfr. Part No. 0216.315MXP
Each (In a Bag of 10)
MYR6.732
Siemens 200A NH Fuse, NH1, 1kV, 110mm
  • RS Stock No. 396-180
  • Mfr. Part No. 3NE3225
Each (In a Pack of 3)
MYR1,035.96
Littelfuse SMD Non Resettable Fuse 2A, 125V
  • RS Stock No. 787-4328
  • Mfr. Part No. 0449002.MR
Each (In a Pack of 5)
MYR8.95
Littelfuse 1.35A Resettable Fuse, 30V dc
  • RS Stock No. 517-6786
  • Mfr. Part No. RUEF135
Each (In a Pack of 10)
MYR1.426
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
Lovato ModuLo P2MB MCB, 2P, 125A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-6166
  • Mfr. Part No. P2MB2PC125
Each
MYR769.11
Better World
Schneider Electric Vigi iDT40 RCD, 25A, 1+N Pole, 30mA, 230V ac
  • RS Stock No. 191-6145
  • Mfr. Part No. A9Y62625
Each
MYR1,608.81
Littelfuse SMD Non Resettable Fuse 125mA, 125V
  • RS Stock No. 738-2905
  • Mfr. Part No. 0154.125DR
Each (In a Pack of 10)
MYR12.26
Eaton xEffect MCB, 3+N, 16A Curve C, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 230-0962
  • Mfr. Part No. 239173 FAZ6-C16/3N
Each
MYR225.97
Littelfuse 70A Tan BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6725
  • Mfr. Part No. 153.5631.5701
Each (In a Pack of 5)
MYR15.89
Socomec 32A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 252-5317
  • Mfr. Part No. 60230032
Each (In a Pack of 10)
MYR10.317
Better World
Siemens, SENTRON MCCB 4P 250A, Fixed Mount
  • RS Stock No. 210-1692
  • Mfr. Part No. 3VA1225-1AA42-0AA0
Each
MYR3,252.87
Results per page
1
2
3
2331

Related links