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

2348 of 999+
Temporarily out of stock
Eaton Terminal for use with INX16, INX40, IZMX16, IZMX40
  • RS Stock No. 239-880
  • Mfr. Part No. 184239 IZMX-SEC-TB2-F-1
Each
HK$516.19
Temporarily out of stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 16A Curve C, 250V DC
  • RS Stock No. 772-1518
  • Mfr. Part No. A9N61511
Each
HK$622.06
Temporarily out of stock
Eaton IZMX/INX Undervoltage Release for use with INX16..., INX40..., IZMX16..., IZMX40...
  • RS Stock No. 132-461
  • Mfr. Part No. 184162 IZMX-UVR230AD-1
Each
HK$3,082.80
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 4P 225A, Fixed Mount
  • RS Stock No. 236-6697
  • Mfr. Part No. 1SDA068330R1 XT4S 250 TMA 225A FF
Each
HK$11,011.90
In Stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 3P, 50A Curve D, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-678
  • Mfr. Part No. SE10D350
Each
HK$1,170.60
Temporarily out of stock
ABB S303 MCB, 3P, 2A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-053
  • Mfr. Part No. 2CDS383001R0021
Each
HK$3,815.43
Temporarily out of stock
Eaton 30A Panel Mount Fuse Holder for 10 x 38mm Fuse, 600V ac
  • RS Stock No. 233-0575
  • Mfr. Part No. BK1-HPS-611E
1 Box of 1000
HK$32,476.90
Temporarily out of stock
Schneider Electric Resi9 R9PF MCB, 1P, 16A, 230V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8970
  • Mfr. Part No. R9PFD616
Each
HK$338.24
Temporarily out of stock
Hager 50A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 250-8637
  • Mfr. Part No. LF450M
Each (In a Pack of 10)
HK$66.972
Temporarily out of stock
Eaton xEffect MCB, 4P, 25A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4435
  • Mfr. Part No. 239185 FAZ6-B25/4
Each
HK$1,488.11
In Stock
Mersen 4A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0601
  • Mfr. Part No. HP10M4
Each
HK$92.00
Temporarily out of stock
ABB S803N MCB, 3P, 32A Curve D, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 141-012
  • Mfr. Part No. 2CCS893001R0321
Each
HK$5,014.01
Temporarily out of stock
Eaton MCB, 1P, 8A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 243-502
  • Mfr. Part No. 101255 PLI-C8/1
Each
HK$330.17
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 1A Curve C, 440V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3301
  • Mfr. Part No. A9F84401
Each
HK$5,157.20
In Stock
Siemens SENTRON 5SJ4 MCB, 3P, 6A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 213-1030
  • Mfr. Part No. 5SJ4306-7HG42
Each
HK$1,894.70
Temporarily out of stock
Bourns 6A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 254-4189
  • Mfr. Part No. PF-HT1-6
Each (In a Box of 50)
HK$184.836
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 4P, 500mA Curve D, 400V AC, 50 kA Breaking Capacity
  • RS Stock No. 610-403
  • Mfr. Part No. 5SY7605-8
Each
HK$2,348.39
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 3P, 63A Curve C, 15 kA Breaking Capacity
  • RS Stock No. 219-9288
  • Mfr. Part No. A9F94363
Each
HK$3,598.16
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3P, 13A Curve D, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 200-312
  • Mfr. Part No. 2CDS383001R0131
Each
HK$3,206.49
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-430
  • Mfr. Part No. 3VA6325-7KM41-0AA0
Each
HK$42,355.40
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