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

2331 of 999+
ABB SU200 M MCB, 3P, 50A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 203-916
  • Mfr. Part No. 2CDS273337R0504
Each
HK$3,839.89
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3766
  • Mfr. Part No. 1SDA071760R1
Each
HK$214,191.30
Better World
ABB System Pro M Compact S200 MCB, 1+N, 3A, Type Z
  • RS Stock No. 237-3204
  • Mfr. Part No. 2CDS251103R0318
Each
HK$752.70
Better World
ABB System Pro M Compact S200 MCB, 1+N, 1.6A Curve K
  • RS Stock No. 237-3203
  • Mfr. Part No. 2CDS251103R0257
Each
HK$710.01
ABB Tmax XT Flexible Bar for use with Tmax XT
  • RS Stock No. 237-6183
  • Mfr. Part No. 1SDA066968R1 FB XT3 8PCS
Each
HK$569.60
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5339
  • Mfr. Part No. D1062718 / CUS102
Each
HK$173.70
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4407
  • Mfr. Part No. 1SDA072588R1
Each
HK$262,431.20
Eaton IZMX/INX Electronic Circuit Breaker 2kA IZMX/INX, 4 channels , Withdrawable
  • RS Stock No. 132-746
  • Mfr. Part No. 183799 IZMX40H4-P20W-1
Each
HK$196,594.80
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 4 channels
  • RS Stock No. 155-869
  • Mfr. Part No. 3VA2450-7HK42-0AA0
Each
HK$36,736.60
RS PRO SMD Non-Resettable Surface Mount Fuse 1.5A, 63V
  • RS Stock No. 252-2143
Each (In a Pack of 50)
HK$1.604
Siemens 5SV33 RCCB, 40A, 4 Pole, 30mA, Type B, 440V
  • RS Stock No. 328-443
  • Mfr. Part No. 5SV3344-4KK60
Each
HK$9,672.73
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3346
  • Mfr. Part No. A9DV6640
Each
HK$3,421.94
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-812
  • Mfr. Part No. 3VA2225-8JP32-0AA0
Each
HK$23,806.00
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-504
  • Mfr. Part No. 3VA5220-5ED31-2AA0
Each
HK$13,677.40
Better World
Siemens SENTRON 5SY6 MCB, 2P, 25A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6682
  • Mfr. Part No. 5SY6225-7
Each
HK$726.20
Eaton Eaton Moeller IZMX/INX - ACB Interlock for use with INX16, INX40, IZMX16, IZMX40
  • RS Stock No. 246-514
  • Mfr. Part No. 184228 +IZMX-PLPC-M-OFF-1
Each
HK$1,274.20
Eaton 12A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3933
  • Mfr. Part No. KTK-R-12
Each
HK$471.20
Europa EUC2P EUC MCB, 2P, 40A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6566
  • Mfr. Part No. EUC2P40C
Each
HK$149.20
Littelfuse SMD Non Resettable Fuse 1.25A, 63V
  • RS Stock No. 624-3051
  • Mfr. Part No. 1206SFS125F/63-2
Each (In a Pack of 10)
HK$4.13
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 5 kA, Withdrawable
  • RS Stock No. 240-820
  • Mfr. Part No. 192334 NZMN3-PMX250-AVE
Each
HK$34,182.20
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