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

219 / 999+
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 1.6A Current Rating
  • RS Stock No. 774-0083
Each
MYR14.35
Better World
Schneider Electric, Compact MCCB 4P 50A, Clip-On
  • RS Stock No. 178-7834
  • Mfr. Part No. LV426610
Each
MYR2,214.27
Mersen 500mA FA Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 188-6568
  • Mfr. Part No. H084003
Each (In a Pack of 10)
MYR20.037
Eaton 12A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7257
  • Mfr. Part No. AGC-12-R
Each
MYR6.45
Limitor Thermal Fuse +130°C 5 A, 250V ac
  • RS Stock No. 124-5061
  • Mfr. Part No. A4-5AF
Each (In a Pack of 5)
MYR6.084
ABB SMISSLINE TP S400M MCB, 1P, 4A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 176-352
  • Mfr. Part No. 2CCS571001R0044 S401M-C4
Each
MYR245.83
Schurter SMD Non Resettable Fuse 5A, 63V ac/dc
  • RS Stock No. 173-9890
  • Mfr. Part No. 3402.0017.11
Each (In a Bag of 100)
MYR3.425
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 211-9664
  • Mfr. Part No. 5SV3416-8
Each
MYR2,369.02
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 3 channels
  • RS Stock No. 259-3251
  • Mfr. Part No. 1SDA071149R1
Each
MYR84,098.33
Siemens SENTRON Wire Connector for use with 3VA1 100/160
  • RS Stock No. 210-9305
  • Mfr. Part No. 3VA9154-0QC00
Each
MYR602.67
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 40A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3231
  • Mfr. Part No. A9F53340
Each
MYR1,225.81
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KT Series
  • RS Stock No. 248-4083
  • Mfr. Part No. KTB0630DC4
Each
MYR19,427.58
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 32A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6689
  • Mfr. Part No. 5SY6532-7
Each
MYR317.98
Eaton 20A Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 229-213
  • Mfr. Part No. FNQ-20
1 Pack of 10
MYR2,600.50
Schneider Electric Motor Mechanism for use with ComPacT, ComPact Compact NSX250 DC, PowerPact
  • RS Stock No. 276-9258
  • Mfr. Part No. LV431541
Each
MYR8,482.90
Eaton IZMX/INX Electronic Circuit Breaker 3.2kA , 4 channels , Fixed
  • RS Stock No. 132-720
  • Mfr. Part No. 183777 IZMX40H4-P32F-1
Each
MYR167,930.17
Siemens Sentron Trip alarm switch for use with 3VA Series Circuit Breaker
  • RS Stock No. 874-4512
  • Mfr. Part No. 3VA9988-0AB11
Each
MYR356.95
Eaton xEffect MCB, 1P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4706
  • Mfr. Part No. 239034 FAZ6-C6/1
Each
MYR141.53
Better World
ABB System Pro M Compact S200 MCB, 1P, 1A Curve K, 253V AC, 72V DC, 20 kA Breaking Capacity
  • RS Stock No. 514-0080
  • Mfr. Part No. 2CDS251001R0217 S201-K1
Each
MYR186.93
Schneider Electric, ComPacT MCCB 3P 500A, Fixed Mount
  • RS Stock No. 260-8257
  • Mfr. Part No. C63W31M500
Each
MYR26,952.77
1
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