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

47266 Products showing for Fuses & Circuit Breakers

26 of 999+
Schneider Electric Opale 1 Phase Distribution Board, 4 Way, 63 A
  • RS Stock No. 301-8593
  • Mfr. Part No. 13394
Each
HK$84.90
Mersen 125A NH Fuse, NH000, 690V ac
  • RS Stock No. 448-3336
  • Mfr. Part No. X320065
Each
HK$568.38
Schurter 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7797
  • Mfr. Part No. 0001.2504
Each (In a Bag of 10)
HK$5.93
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2334
  • Mfr. Part No. 2CCF800246R0001
Each
HK$158.38
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 212-022
  • Mfr. Part No. R9D01625
Each
HK$1,265.47
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 20A Curve C, 440V AC, 180V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3288
  • Mfr. Part No. A9F87320
Each
HK$1,905.33
ABB, Tmax MCCB 4P 1kA, Fixed Mount
  • RS Stock No. 237-6019
  • Mfr. Part No. 1SDA062746R1 T7S 1000A PR231-LS/I FF
Each
HK$29,947.80
ABB, Protecta MCCB 3P 63A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 831-9163
  • Mfr. Part No. 1SDA067414R1 XT1N 160 TMD 63-630 3p F F
Each
HK$2,390.10
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 272-0177
  • Mfr. Part No. 3VA1563-6MH32-0AA0
Each
HK$25,330.00
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 100mA, Type A, 400V ac
  • RS Stock No. 209-6573
  • Mfr. Part No. 5SV3444-8
Each
HK$2,023.10
RS PRO 8A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1585
Each (In a Pack of 10)
HK$7.09
RS PRO 200A British Standard Fuse, B2, 415V ac, 111mm
  • RS Stock No. 521-2775
Each
HK$243.10
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 63A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS Stock No. 790-8879
  • Mfr. Part No. A9F44163
Each
HK$237.90
Eaton 8A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-180
  • Mfr. Part No. C10G8 CYLINDRICAL FUSE 10 x 38 8A GG 500V AC
1 Pack of 10
HK$98.00
Schneider Electric Mureva Enclosure
  • RS Stock No. 119-361
  • Mfr. Part No. 13157M
Each
HK$3,894.69
Schneider Electric, ComPacT NSX MCCB 4P 160A, Fixed Mount
  • RS Stock No. 254-6346
  • Mfr. Part No. C16F4
Each
HK$6,347.90
Better World
Schneider Electric, ComPacT NSX MCCB 4P 160A, Fixed Mount
  • RS Stock No. 254-6341
  • Mfr. Part No. C16B42D160
Each
HK$12,878.16
Schurter 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7774
  • Mfr. Part No. 0034.1522
Each (In a Pack of 10)
HK$2.67
Siemens SENTRON Adapter for use with SIRIUS S2
  • RS Stock No. 211-3845
  • Mfr. Part No. 8US1211-6MT10
Each
HK$1,167.50
Eaton xEffect MCB, 2P, 20A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4766
  • Mfr. Part No. 168073 FAZ6-D20/2
Each
HK$528.60
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