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

2286 of 999+
Temporarily out of stock
Lovato P1RD MCCB, 40A, 4 Pole, 300mA, Type A, 230 or 400V ac
  • RS Stock No. 276-5671
  • Mfr. Part No. P1RD4P40A300
Each
HK$2,405.15
In Stock
Legrand DX3 RCCB, 63A, 3+N Pole, 300mA, Type AC
  • RS Stock No. 732-0089
  • Mfr. Part No. 4 116 66
Each
HK$3,116.59
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 16A Curve C, 500V DC
  • RS Stock No. 772-1530
  • Mfr. Part No. A9N61531
Each
HK$1,279.60
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA , DIN Rail
  • RS Stock No. 132-644
  • Mfr. Part No. 183606 IZMX40H3-P16W-1
Each
HK$147,098.81
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4840
  • Mfr. Part No. 3VA2580-5HN32-0KK0
Each
HK$64,750.30
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6503
  • Mfr. Part No. 5SL4406-8
Each
HK$1,919.20
In Stock
ABB High Performance S800S MCB, 3P, 16A Curve C, 400 V, 690 V AC, 50 kA Breaking Capacity
  • RS Stock No. 231-9572
  • Mfr. Part No. 2CCS863001R0164 S803S C 16A - 50 KA
1 Box of 1
HK$1,925.00
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8149
  • Mfr. Part No. C40S4TM250D
Each
HK$47,256.69
Temporarily out of stock
ABB S403M MCB, 3P, 10A Curve C, 440V AC, 12V DC, 25 kA Breaking Capacity
  • RS Stock No. 140-547
  • Mfr. Part No. 2CCS573001R0104
Each
HK$2,839.31
Temporarily out of stock
Hager Hager MMN Circuit Breaker, 4P, 1.25A, Type AC, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-888
  • Mfr. Part No. MMN401
Each
HK$5,904.90
Temporarily out of stock
ABB SMISSLINE TP MCB, 3P, 500mA Curve K, 415V AC
  • RS Stock No. 246-2638
  • Mfr. Part No. 2CCS573001R0157
Each
HK$1,509.26
In Stock
Eaton 1A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 169-9362
  • Mfr. Part No. TDC10-1A
1 Bag of 1000
HK$4,169.60
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 10A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6544
  • Mfr. Part No. 5SL4610-8
Each
HK$1,566.90
Temporarily out of stock
FRM-A Fuseholder 3x10
  • RS Stock No. 577-329
  • Mfr. Part No. 3-133-483
Each
HK$190.70
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-286
  • Mfr. Part No. 3VA5340-1BB41-0AA0
Each
HK$19,001.30
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 1P, 1.6A Curve C, 400V AC, 72V DC
  • RS Stock No. 213-1035
  • Mfr. Part No. 5SL6115-7
Each
HK$184.80
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 25A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1262
  • Mfr. Part No. 5SY4125-7
Each
HK$422.30
In Stock
Eaton xEffect MCB, 1P, 2A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6955
  • Mfr. Part No. 278523 FAZ-B2/1
Each
HK$237.50
In Stock
ABB SMISSLINE TP MCB, 4P, 2A Curve C, 415V AC
  • RS Stock No. 246-2661
  • Mfr. Part No. 2CCS573103R8024
Each
HK$1,587.40
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 622-0008
  • Mfr. Part No. 5SY4101-7
Each
HK$410.40
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