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

46580 Products showing for Fuses & Circuit Breakers

7 / 999+
Temporarily out of stock
Eaton 6A Tag Fuse, 550V ac
  • RS Stock No. 229-145
  • Mfr. Part No. NITD6
1 Pack of 20
MYR893.75
In Stock
Eaton 10A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-598
  • Mfr. Part No. TDC180-10A
Each (In a Pack of 10)
MYR4.423
In Stock
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 30A Current Rating
  • RS Stock No. 782-0876
  • Mfr. Part No. W23-X1A1G-30
Each
MYR205.02
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 6A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0204
  • Mfr. Part No. 2CDS253001R0377 S203-K6
Each
MYR844.14
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 2A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6447
  • Mfr. Part No. 5SL4102-8
Each
MYR189.56
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 20A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6090
  • Mfr. Part No. A9P22620
Each
MYR256.40
In Stock
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
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 4A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2257
  • Mfr. Part No. A9F07104
Each
MYR225.98
Limited stock
Limitor Thermal Fuse +115°C 5 A, 250V ac
  • RS Stock No. 124-5059
  • Mfr. Part No. A2-5AF
Each (In a Pack of 5)
MYR6.078
Last RS stock
ABB 24V dc Undervoltage Release Circuit Trip for use with DS200, DS201, DS202C, F200, S200, SN201
  • RS Stock No. 225-6151
  • Mfr. Part No. 2CSS200911R0007 S2C-UA 24 VDC
Each
MYR557.88
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4732
  • Mfr. Part No. 1SDA073009R1
Each
MYR71,832.02
In Stock
Hager NGT MCB, 1+N, 32A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4800
  • Mfr. Part No. NGT732
Each
MYR658.48
In Stock
Eaton 250mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-431
  • Mfr. Part No. TDC11-250MA
Each (In a Pack of 10)
MYR12.599
In Stock
Eaton 2A British Standard Fuse, F1, 550V ac
  • RS Stock No. 413-462
  • Mfr. Part No. NSD2
Each (In a Pack of 5)
MYR34.744
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 32A Curve C, 230V AC
  • RS Stock No. 238-3416
  • Mfr. Part No. A9P71632
Each
MYR204.45
In Stock
Wurth Elektronik 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 893-0599
  • Mfr. Part No. 696108003002
Each (In a Pack of 10)
MYR2.798
In Stock
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
In Stock
Littelfuse 800mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3732
  • Mfr. Part No. 0218.800MXP
Each (In a Pack of 10)
MYR3.314
Temporarily out of stock
Better World
Siemens RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8760
  • Mfr. Part No. 5SU1354-7LB25
Each
MYR1,654.16
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6949
  • Mfr. Part No. 2CSR275080R1164 DS201 M C16 AC30
Each
MYR922.90
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