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

47265 Products showing for Fuses & Circuit Breakers

107 of 999+
Eaton 16A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 260-756
  • Mfr. Part No. 7.2TDLSJ16
1 Pack of 3
HK$6,118.80
Schneider Electric ComPacT Control Unit for use with Compact NS630b
  • RS Stock No. 347-120
  • Mfr. Part No. C2AFM
Each
HK$17,974.81
Eaton 10A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 255-490
  • Mfr. Part No. 24TDMEJ10
Each
HK$1,555.40
30A NH Fuse, 1.75 x 0.75 x 1.88in, 600V ac
  • RS Stock No. 262-587
  • Mfr. Part No. TCF30RN
Each
HK$748.70
ABB PBSC 3, 3+N Phase Busbar
  • RS Stock No. 203-392
  • Mfr. Part No. 1STQ007418A0000
Each
HK$4,425.62
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 5 kA, Withdrawable
  • RS Stock No. 231-345
  • Mfr. Part No. 113525 NZMN3-S400-AVE
Each
HK$23,586.58
400A Tag Fuse, 190 x 225mm, 690V
  • RS Stock No. 262-033
  • Mfr. Part No. EBH213TTM1
Each
HK$3,553.80
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-760
  • Mfr. Part No. 3VA6140-6KT41-0AA0
Each
HK$23,396.80
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-581
  • Mfr. Part No. Mi EP 03
Each
HK$731.30
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3523
  • Mfr. Part No. 1SDA071500R1
Each
HK$98,220.19
Eaton 80A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 182-1715
  • Mfr. Part No. 170M3811D
Each
HK$3,271.30
Eaton 25A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 255-491
  • Mfr. Part No. 24TDMEJ25
Each
HK$1,823.30
Schneider Electric A9R3 RCCB, 63A, 2 Pole, 30mA, Type A-SI, 240V ac
  • RS Stock No. 276-8739
  • Mfr. Part No. A9R31263
Each
HK$4,358.24
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PB 3 Pole 690V ac Voltage Rating, 115A Current Rating
  • RS Stock No. 209-5323
  • Mfr. Part No. GV4PB115N
Each
HK$5,172.00
Eaton IKA Standard Distribution Board Distribution Board
  • RS Stock No. 125-785
  • Mfr. Part No. 174204 IKA-1/6-OT
Each
HK$357.76
Siemens SENTRON Option Plug
  • RS Stock No. 277-0903
  • Mfr. Part No. 3WA9111-0EB08
Each
HK$1,649.20
Bourns SMD Non Resettable Fuse 2.5A, 32V dc
  • RS Stock No. 692-5009P
  • Mfr. Part No. SF-0603S250-2
Each (Supplied on a Reel)
HK$3.84
ETA Thermal Circuit Breaker - 1410-G1 Single Pole 250V Voltage Rating Panel Mount, 1A Current Rating
  • RS Stock No. 729-2704
  • Mfr. Part No. 1410-G111-P2F1-S01-1A
Each
HK$153.70
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4209
  • Mfr. Part No. 1SDA072330R1
Each
HK$102,929.62
Bourns 0.75A Resettable Fuse, 13.2V
  • RS Stock No. 647-8190
  • Mfr. Part No. MF-MSMF075-2
Each (In a Pack of 10)
HK$2.37
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