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

239 of 999+
In Stock
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 300mA, Type A
  • RS Stock No. 124-7743
  • Mfr. Part No. 5SV3646-6
Each
HK$983.60
Temporarily out of stock
ABB S800S MCB, 1P, 20A Curve C, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-848
  • Mfr. Part No. 2CCS861001R0204
Each
HK$1,536.64
Temporarily out of stock
Hager BTC RCCB, 125A, 3P Pole, Type AC
  • RS Stock No. 602-082
  • Mfr. Part No. BTC380E
Each
HK$6,289.40
Temporarily out of stock
Better World
Siemens RCCB, 25A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 269-9759
  • Mfr. Part No. 5SV3342-6KK60
Each
HK$4,466.80
Temporarily out of stock
ABB S204L MCB, 4P, 6A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 203-083
  • Mfr. Part No. 2CDS244701R0064
Each
HK$2,109.05
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 4P, 500mA, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-269
  • Mfr. Part No. 2CDS254001R0158
Each
HK$3,726.47
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 65 kA
  • RS Stock No. 209-7086
  • Mfr. Part No. 3VA5150-6EC31-0AA0
Each
HK$6,373.10
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-7919
  • Mfr. Part No. LV426707
Each
HK$10,905.30
In Stock
Bourns 0.75A Resettable Fuse, 30V
  • RS Stock No. 245-9181
  • Mfr. Part No. MF-MSHT075KX-2
Each (On a Tape of 10)
HK$4.55
Temporarily out of stock
Siemens SENTRON 5SY4220 Circuit Breaker, 2P, 20A Curve C, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 153-528
  • Mfr. Part No. 5SY4220-6
Each
HK$554.90
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-529
  • Mfr. Part No. 3VA6580-5HL32-0AA0
Each
HK$36,663.40
In Stock
Better World
Schneider Electric iID RCCB, 100A, 4 Pole, 300mA, Type A-SI, 415V ac
  • RS Stock No. 248-3705
  • Mfr. Part No. A9R35491
Each
HK$6,695.20
Temporarily out of stock
Legrand DX Range DX3 MCB, 4P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9752
  • Mfr. Part No. 4 079 01
Each
HK$2,024.24
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-382
  • Mfr. Part No. 113010 NZMN2-4-AF250-BT-NA
Each
HK$22,907.62
Temporarily out of stock
Better World
ABB, XT4N MCCB 4P 100A, Fixed Mount
  • RS Stock No. 236-6622
  • Mfr. Part No. 1SDA068160R1 XT4N 160 Ekip LSIG 100A FF
Each
HK$16,978.70
Temporarily out of stock
Siemens 8A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-010
  • Mfr. Part No. 3NW2080-0HG
1 Pack of 10
HK$1,724.50
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3950
  • Mfr. Part No. 1SDA071994R1
Each
HK$428,381.95
Temporarily out of stock
Omron Busbar
  • RS Stock No. 111-3542
  • Mfr. Part No. PYDN-31.0-080Y
Each
HK$125.50
Temporarily out of stock
Eaton 63A Cartridge Fuses, 76 x 359mm
  • RS Stock No. 240-280
  • Mfr. Part No. 12BFGHO63
1 Pack of 3
HK$17,769.10
Temporarily out of stock
Mersen 32A FF Cartridge Fuse, 22 x 58mm
  • RS Stock No. 136-0632
  • Mfr. Part No. A1018555 / FR22GR69V32
Each
HK$160.81
1
239
2364
Results per page

Related links