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

46578 Products showing for Fuses & Circuit Breakers

166 / 999+
Eaton 3A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7077
  • Mfr. Part No. MDA-3-R
Each
MYR29.65
Legrand DX3 RCD, 32A, 1+N Pole, 30mA, Type C
  • RS Stock No. 731-9865
  • Mfr. Part No. 4 107 16
Each
MYR1,809.98
ABB S401M MCB, 1P, 6A Curve C, 254V AC, 12V DC, 25 kA Breaking Capacity
  • RS Stock No. 140-250
  • Mfr. Part No. 2CCS571001R0064
Each
MYR241.74
Siemens SENTRON Cover for use with Busbar
  • RS Stock No. 211-3858
  • Mfr. Part No. 8US1922-2BA00
Each (In a Pack of 10)
MYR128.072
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-390
  • Mfr. Part No. Mi 1884
Each
MYR6,783.01
Siemens 3A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-167
  • Mfr. Part No. 3NW2030-0HG
1 Pack of 10
MYR840.55
HENSEL ENYSTAR Distribution Board, 100 A
  • RS Stock No. 117-266
  • Mfr. Part No. FP 1249
Each
MYR956.56
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 1.25kA, Fixed Mount
  • RS Stock No. 232-0157
  • Mfr. Part No. 1SDA062866R1 T7S 1250A PR231-LS/I FF
Each
MYR23,158.96
EV busbars 3Ph., 13.5HP
  • RS Stock No. 611-294
  • Mfr. Part No. EVG-16/3PHAS/12MODUL/HI
Each
MYR185.75
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6944
  • Mfr. Part No. 2CSR275080R1204 DS201 M C20 AC30
Each
MYR950.36
Lovato 100A Base Mount Fuse Holder for 22 x 58mm Fuse, 1P, 690V ac
  • RS Stock No. 188-1626
  • Mfr. Part No. FB03A1P
Each
MYR159.88
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 232-0250
  • Mfr. Part No. 1SDA067397R1 XT1C 160 TMD 100A FF
Each
MYR1,290.85
Eaton RCCB, 63A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 227-0742
  • Mfr. Part No. 267451 PFGM-63/2/03-A
Each
MYR491.30
Schneider Electric Acti9 iC60H MCB, 4P, 2A Curve C, 415V AC, 250V DC, 70 kA Breaking Capacity
  • RS Stock No. 654-796
  • Mfr. Part No. A9F53402
Each
MYR1,440.50
Better World
Schneider Electric, ComPacT NSX MCCB 4P 63A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 272-7446
  • Mfr. Part No. C10F6TM063
Each
MYR3,180.35
Siemens 80A Centred Tag Fuse, NH000, 690V ac
  • RS Stock No. 396-196
  • Mfr. Part No. 3NE1820-0
Each (In a Pack of 3)
MYR541.073
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 2.5A Current Rating
  • RS Stock No. 210-2055
  • Mfr. Part No. 3120-N32F-H7T1-SGRD-2.5A
Each
MYR200.50
TE Connectivity Thermal Magnetic Circuit Breakers - Potter & Brumfield W54 Single Pole 250V ac Voltage Rating Panel
  • RS Stock No. 240-8963
  • Mfr. Part No. 4-1393249-4
Each
MYR67.24
Schurter SMD Non Resettable Fuse 1.6A, 32 V ac, 63V dc
  • RS Stock No. 665-7384
  • Mfr. Part No. 3413.0218.22.
Each (In a Pack of 10)
MYR2.831
RS PRO 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8051
Each (In a Box of 500)
MYR1.837
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