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

117 of 999+
Siemens SENTRON 3 Phase Busbar Connector, 400V
  • RS Stock No. 152-506
  • Mfr. Part No. 5ST3624-1
Each
HK$113.00
Schneider Electric, ComPacT MCCB 4P 1.6kA, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 345-342
  • Mfr. Part No. C16BN4FM
Each
HK$151,881.08
ABB S802N MCB, 2P, 25A Curve C, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-595
  • Mfr. Part No. 2CCS892001R0254
Each
HK$3,127.32
ABB MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 250-4237
  • Mfr. Part No. 1SDA054537R1
Each
HK$39,236.09
Schneider Electric, ComPacT MCCB 4P 200A, Breaking Capacity 15 kA, Fixed Mount
  • RS Stock No. 429-197
  • Mfr. Part No. C25F6TM200
Each
HK$27,780.82
Lovato 4 Phase Surge Protector, 50kA
  • RS Stock No. 216-8306
  • Mfr. Part No. SG24PA300
Each
HK$2,703.95
Schneider Electric MasterPacT Locking Kit for use with MasterPact NW
  • RS Stock No. 341-053
  • Mfr. Part No. 64939
Each
HK$2,887.40
Siemens SENTRON 5SJ4130 MCB, 1P, 30A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-898
  • Mfr. Part No. 5SJ4130-8HG42
Each
HK$695.00
Schneider Electric, PowerPact MCCB 3P 150A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 432-913
  • Mfr. Part No. NJGF36150TW
Each
HK$27,296.90
Siemens 6A Diazed Fuse, gG, 690V ac
  • RS Stock No. 167-687
  • Mfr. Part No. 5SD8006
1 Pack of 5
HK$1,679.70
Schneider Electric, PowerPact Circuit breaker 3P 110A, Breaking Capacity 35 kA, DIN Rail Mount
  • RS Stock No. 357-941
  • Mfr. Part No. BGL36110LU
Each
HK$12,871.61
Schneider Electric, ComPacT MCCB 3P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 345-320
  • Mfr. Part No. C11F34V100B
Each
HK$23,988.27
ABB S301 MCB, 1P, 6A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-262
  • Mfr. Part No. 2CDS381001R0065
Each
HK$540.50
Lovato 3 Phase Surge Protector, 60kA
  • RS Stock No. 216-8285
  • Mfr. Part No. SA03NA320R
Each
HK$6,101.60
ETI 2A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-818
  • Mfr. Part No. 2311401
Each (In a Pack of 5)
HK$8.12
Siemens 6A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1045
  • Mfr. Part No. 5SE2306
Each (In a Pack of 10)
HK$12.11
Lovato 3 Phase Surge Protector, 100kA
  • RS Stock No. 216-8289
  • Mfr. Part No. SA1B3NA320R
Each
HK$12,687.18
Lovato 1 Phase Surge Protector, 50kA
  • RS Stock No. 216-8298
  • Mfr. Part No. SG21PA300
Each
HK$774.44
Littelfuse SMD Non Resettable Fuse 5A, 125V ac/dc
  • RS Stock No. 541-3445P
  • Mfr. Part No. 0451005.MRL
Each (Supplied on a Reel)
HK$6.75
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 80A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-590
  • Mfr. Part No. 3VA5280-6EC61-0AA0
Each
HK$7,508.50
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