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

2352 of 999+
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 700A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-553
  • Mfr. Part No. 3VA5570-7GC42-0AA0
Each
HK$46,122.20
Better World
ABB System Pro M Compact S200M MCB, 2P, 25A Curve B, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 131-927
  • Mfr. Part No. 2CDS272001R0255 S202M-B25
Each
HK$439.20
ABB S801C MCB, 1P, 63A Curve K, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-356
  • Mfr. Part No. 2CCS881001R0597
Each
HK$1,714.76
Better World
Schneider Electric, ComPacT NSX MCCB 4P 50A, Fixed Mount
  • RS Stock No. 254-6324
  • Mfr. Part No. C11N4TM050L
Each
HK$7,015.22
ABB Mounting Frame for use with OA1G10, OA3G01
  • RS Stock No. 515-1052
  • Mfr. Part No. OSZ4 1SCA022530R0200
Each
HK$64.50
ABB 24V ac/dc Shunt Operation Release Shunt trip for use with S800PV, S800S, S800N, S800C, S800B, S800HV, S800U Series
  • RS Stock No. 435-532
  • Mfr. Part No. 2CCS800900R0191 S800-SOR24
Each
HK$811.10
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 6A Curve C, 6 kA Breaking Capacity
  • RS Stock No. 201-3736
  • Mfr. Part No. 5SL6006-7
Each
HK$375.50
Better World
Schneider Electric Surge Protector, 50kA, DIN Rail Mount
  • RS Stock No. 219-8278
  • Mfr. Part No. A9L40501
Each
HK$3,670.00
ABB Tmax XT Cover for use with Tmax XT
  • RS Stock No. 232-0207
  • Mfr. Part No. 1SDA066667R1 HTC XT2 2PCS
Each
HK$260.40
Siemens SENTRON Nut Keeper Kit for use with 3VA1
  • RS Stock No. 269-7074
  • Mfr. Part No. 3VA9114-0QG00
Each (In a Pack of 4)
HK$114.55
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9342
  • Mfr. Part No. 3VA1140-6GF42-0AA0
Each
HK$5,157.10
Phoenix Contact 2 Phase Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 201-6268
  • Mfr. Part No. 1065317
Each
HK$1,237.50
Schneider Electric Kaedra Distribution Board, 17 Way, 125 A
  • RS Stock No. 498-3303
  • Mfr. Part No. 13172
Each
HK$3,011.82
Schneider Electric EasyPact Electronic Circuit Breaker 63A, Fixed
  • RS Stock No. 122-540
  • Mfr. Part No. LV510725
Each
HK$3,759.00
ABB High Performance S800N MCB, 3P, 63A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 435-302
  • Mfr. Part No. 2CCS893001R0635 S803N-B63
Each
HK$1,609.30
ABB RCBO, 50A Current Rating, 2P Poles, Type B
  • RS Stock No. 237-5143
  • Mfr. Part No. 2CSR272001R1505
Each
HK$2,563.43
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 10A Curve B, 440V AC, 180V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3405
  • Mfr. Part No. A9F76310
Each
HK$1,611.21
Siemens SENTRON Shunt Trip Release SHT
  • RS Stock No. 277-0730
  • Mfr. Part No. 3WA9111-0AD34
Each
HK$3,006.80
Eaton 20A D2 Diazed Fuse, gG, 500V ac
  • RS Stock No. 181-8910
  • Mfr. Part No. 20D27
Each
HK$25.61
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 3A Curve D
  • RS Stock No. 216-4057
  • Mfr. Part No. 5SY4603-8
Each
HK$1,567.60
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