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

189 / 999+
Better World
Siemens 5SV4314 RCCB, 40A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 231-8388
  • Mfr. Part No. 5SV4314-0
Each
MYR584.85
Better World
Schneider Electric 690V ac Circuit Trip for use with Compact NSX 100/160 Circuit Breakers
  • RS Stock No. 212-0227
  • Mfr. Part No. LV429044
Each
MYR873.66
Better World
ABB System Pro M Compact S200 MCB, 1P, 40A Curve C
  • RS Stock No. 231-9665
  • Mfr. Part No. 2CDS251001R0404 S201 C 40A - 10 KA
1 Box of 1
MYR105.04
ABB System Pro M Compact S200 M UC MCB, 2P, 32A Curve B, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-015
  • Mfr. Part No. 2CDS272061R0325
Each
MYR2,087.96
ABB System Pro M Compact S300P MCB, 2P, 8A Curve C, 415V AC, 125V DC, 25 kA Breaking Capacity
  • RS Stock No. 200-905
  • Mfr. Part No. 2CDS382001R0084
Each
MYR1,250.66
ABB S804C MCB, 4P, 20A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-499
  • Mfr. Part No. 2CCS884001R0487
Each
MYR1,423.16
Limitor Thermal Fuse +167°C 15 A, 250V ac
  • RS Stock No. 797-6052
  • Mfr. Part No. SF 167 R
Each (In a Pack of 10)
MYR4.693
Better World
Siemens RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 187-3281
  • Mfr. Part No. 5SV1316-6KK10
Each
MYR346.28
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PE 3 Pole 690V ac Voltage Rating, 3.5A Current Rating
  • RS Stock No. 175-1522
  • Mfr. Part No. GV4PE03S
Each
MYR4,960.56
ABB PS1 3 Phase Busbar, 690V ac, 17.5mm Pitch
  • RS Stock No. 711-6496
  • Mfr. Part No. 1SAM201906R1103 PS1-3-0-65
Each
MYR86.63
RCBO, 40A Current Rating, 1+N Poles, 30mA Trip Sensitivity, Type C, xEffect Range
  • RS Stock No. 252-754
  • Mfr. Part No. 193493 FRBmM-C40/1N/003-F
Each
MYR1,390.54
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3387
  • Mfr. Part No. 1SDA071310R1
Each
MYR293,368.23
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-1707
  • Mfr. Part No. 3VA2040-6KP46-0AA0
Each
MYR8,466.48
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 100A, Breaking Capacity 25kA
  • RS Stock No. 260-9727
  • Mfr. Part No. LV510317
Each
MYR2,817.65
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 65V dc Voltage Rating DIN Rail, 1.5A Current Rating
  • RS Stock No. 135-431
  • Mfr. Part No. 0914086
1 Pack of 6
MYR2,301.96
Bourns 110A Resettable Fuse, 6V
  • RS Stock No. 233-0775
  • Mfr. Part No. MF-PSMF110X-2
Each (On a Tape of 10)
MYR1.891
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 231-136
  • Mfr. Part No. 113329 NZMH2-A50-SVE
Each
MYR3,259.08
Better World
ABB System Pro M Compact S200 MCB, 2P, 20A Curve C, 400V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7725
  • Mfr. Part No. 2CDS252001R0204 S202-C20
Each
MYR283.41
RS PRO 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8104
Each (In a Pack of 50)
MYR0.331
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 3P 220A, Fixed Mount
  • RS Stock No. 221-1048
  • Mfr. Part No. LV433517
Each
MYR16,971.68
1
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