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

80 of 999+
Temporarily out of stock
Schneider Electric Acti9 Reds RCCB, 25A, 300mA, 230V
  • RS Stock No. 357-676
  • Mfr. Part No. A9CR5225
Each
HK$7,330.90
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 1A Curve B, 230V AC, 72V DC
  • RS Stock No. 209-7478
  • Mfr. Part No. 5SL4501-6
Each
HK$535.60
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4231
  • Mfr. Part No. 1SDA072354R1
Each
HK$63,227.91
In Stock
ABB FH200 RCCB, 40A, 4 Pole, 30mA, Type AC, 230V
  • RS Stock No. 540-1650
  • Mfr. Part No. 2CSF204006R1400 FH204 AC-40/0,03
Each
HK$1,361.87
Temporarily out of stock
Schneider Electric Acti 9 MCB, 1P, 16A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6149
  • Mfr. Part No. A9PE4616
Each
HK$843.70
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 50A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7769
  • Mfr. Part No. LV426504
Each
HK$3,584.14
Temporarily out of stock
Eaton 1A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-916
  • Mfr. Part No. LP-CC-1
1 Pack of 10
HK$5,552.50
Temporarily out of stock
Schneider Electric Cross Elbow Busbar Trunking, 0.5 → 1.9m, 630A, Canalis Series
  • RS Stock No. 335-026
  • Mfr. Part No. KSA630CM4A
Each
HK$19,082.20
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 65V dc Voltage Rating DIN Rail, 4A Current Rating
  • RS Stock No. 135-837
  • Mfr. Part No. 0914303
1 Pack of 6
HK$3,938.10
In Stock
Eaton 3A F Fibreglass Cartridge Fuse, 10 x 35mm
  • RS Stock No. 849-5881
  • Mfr. Part No. BBS-3
Each (In a Pack of 10)
HK$216.95
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 125A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3076
  • Mfr. Part No. A9N18369
Each
HK$7,266.20
Temporarily out of stock
Better World
Schneider Electric Busbar Trunking End Cover, Canalis KBA Series
  • RS Stock No. 211-0359
  • Mfr. Part No. KBA40AF
Each (In a Pack of 5)
HK$153.26
Temporarily out of stock
Eaton MMB Busbar
  • RS Stock No. 228-972
  • Mfr. Part No. NNB
Each (In a Pack of 10)
HK$448.58
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 250V ac Voltage Rating DIN Rail, 500mA Current
  • RS Stock No. 135-482
  • Mfr. Part No. 0914581
1 Pack of 6
HK$3,931.50
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA2, 4 channels
  • RS Stock No. 156-788
  • Mfr. Part No. 3VA2450-5JP42-0AA0
Each
HK$36,736.60
Temporarily out of stock
ABB S802C MCB, 2P, 20A Curve D, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 141-061
  • Mfr. Part No. 2CCS882001R0201
Each
HK$2,960.63
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 3P, 500mA Curve C, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-724
  • Mfr. Part No. 2CDS253001R0984
Each
HK$2,081.74
Temporarily out of stock
Schneider Electric Resi9 R9F2 MCB, 3P, 50A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-141
  • Mfr. Part No. R9F23350
Each
HK$1,374.89
Temporarily out of stock
ABB S801S MCB, 1P, 50A, UC-K, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-627
  • Mfr. Part No. 2CCS861001R1577
Each
HK$3,371.38
Temporarily out of stock
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-675
  • Mfr. Part No. 3VA5212-5EF31-0AA0
Each
HK$12,226.70
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