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

2264 of 999+
In Stock
Better World
Schneider Electric RCBO, 40A Current Rating, 3P Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3302
  • Mfr. Part No. A9DK5740
Each
HK$3,564.10
Temporarily out of stock
Eaton NZMH3 Electronic Circuit Breaker 320A , 3 channels , Fixed
  • RS Stock No. 120-675
  • Mfr. Part No. 168917 NZMH3-S320-SVE
Each
HK$25,908.80
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 100A 3VA2, 3 channels
  • RS Stock No. 157-245
  • Mfr. Part No. 3VA2110-5HK32-0AA0
Each
HK$6,097.10
Temporarily out of stock
Schurter Thermal Circuit Breaker - T13 Single Pole 240V ac Voltage Rating, 1A Current Rating
  • RS Stock No. 173-9843
  • Mfr. Part No. 4411.0129
Each (In a Box of 20)
HK$210.08
Temporarily out of stock
Eaton xEffect FAZ MCB, 4P, 6A Curve D, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 246-828
  • Mfr. Part No. 190831 FAZ-D6/4-NA
Each
HK$2,706.50
In Stock
Socomec 6A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5264
  • Mfr. Part No. 60120006
Each (In a Pack of 10)
HK$10.23
Temporarily out of stock
Siemens ALPHA Base for use with ALPHA 630 DIN
  • RS Stock No. 629-095
  • Mfr. Part No. 8GK9902-0KK43
Each
HK$2,584.18
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 35A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 241-200
  • Mfr. Part No. 102215 FAZ-C35/2-RT
Each
HK$1,488.11
Temporarily out of stock
ABB S804C MCB, 4P, 13A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-427
  • Mfr. Part No. 2CCS884001R0134
Each
HK$4,863.78
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 1P, 63A Curve B, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8960
  • Mfr. Part No. 5SY6163-6
Each
HK$228.20
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 3+N, 13A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8982
  • Mfr. Part No. 5SY7613-7
Each
HK$1,475.30
Temporarily out of stock
RS PRO 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-378
Each (In a Pack of 10)
HK$3.13
Temporarily out of stock
Eaton RCBO, 16A Current Rating, 3P Poles, 100mA Trip Sensitivity, Type A, Type C, FRBmM Range
  • RS Stock No. 123-292
  • Mfr. Part No. 170745 FRBMM-C16/3/01-A
Each
HK$1,665.09
Temporarily out of stock
Schurter SMD Non Resettable Fuse 1.5A, 125V ac/dc
  • RS Stock No. 188-4596
  • Mfr. Part No. 3-103-110
Each (On a Tape of 5)
HK$31.902
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3768
  • Mfr. Part No. 3VA2063-5HL46-0AA0
Each
HK$7,111.40
Temporarily out of stock
ABB S800S MCB, 1P, 40A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-957
  • Mfr. Part No. 2CCS861001R0557
Each
HK$2,043.49
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-6557
  • Mfr. Part No. 1SDA068031R1 DCL EKIP M-LIU IN=160A XT4
Each
HK$8,751.10
In Stock
Better World
Siemens RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6165
  • Mfr. Part No. 5SU1324-7FP06
Each
HK$1,248.00
Temporarily out of stock
Eaton RCCB, 40A, 4 Pole, 500mA, Type AC, 230 V ac, 400 V ac
  • RS Stock No. 227-0735
  • Mfr. Part No. 264303 PFGM-40/4/05
Each
HK$2,055.38
In Stock
Eaton xEffect MCB, 2P, 1A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3232
  • Mfr. Part No. 278745 FAZ-C1/2
Each
HK$724.90
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