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

129 of 999+
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 65V dc Voltage Rating DIN Rail, 2A Current Rating
  • RS Stock No. 135-444
  • Mfr. Part No. 0914277
1 Pack of 6
HK$3,922.80
Better World
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9380
  • Mfr. Part No. 3VA9384-0JB13
Each
HK$1,080.00
Eaton 250A British Standard Fuse, FM, 690 V ac, 500V dc, 80 → 85mm
  • RS Stock No. 156-9083
  • Mfr. Part No. 250FM
Each
HK$396.10
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-9946
  • Mfr. Part No. 1SDA070810R1
Each
HK$91,156.56
MECATRACTION Earth Clamp
  • RS Stock No. 284-6377
  • Mfr. Part No. C6RG2-50
1 Box of 6
HK$439.78
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 4A, Type Z, 15 kA Breaking Capacity
  • RS Stock No. 219-9240
  • Mfr. Part No. A9F92204
Each
HK$3,951.39
Eaton 15A Fuse Holder for 0.001 x 0.001 x 0.001in Fuse, 1P, 125V
  • RS Stock No. 229-136
  • Mfr. Part No. HLS-01-ML
1 Pack of 10
HK$1,186.40
Schneider Electric Acti9 Reds RCCB, 63A, 300mA, 230V
  • RS Stock No. 357-883
  • Mfr. Part No. A9CR5263
Each
HK$8,770.93
Eaton xEffect xEffect - FAZ-T MCB, 3+N, 32A Curve B, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 129-250
  • Mfr. Part No. 142517 FAZT-B32/3N
Each
HK$2,216.95
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 20A Curve B, 240V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-304
  • Mfr. Part No. SE10B120
Each
HK$255.66
Panasonic SMD Non Resettable Fuse 2.5A, 32V dc
  • RS Stock No. 759-4789
  • Mfr. Part No. ERBRE2R50V
Each (In a Pack of 10)
HK$1.88
Siemens 5SM26 RCCB, 40A, 3 Pole, 300mA, Type AC, 400V
  • RS Stock No. 328-420
  • Mfr. Part No. 5SM2633-0
Each
HK$813.81
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 9 kA, Withdrawable
  • RS Stock No. 231-411
  • Mfr. Part No. 113580 NZMH3-4-A400-AVE
Each
HK$36,728.46
ABB S301 MCB, 1P, 16A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-732
  • Mfr. Part No. 2CDS381001R0165
Each
HK$1,046.63
Better World
Schneider Electric RCBO, 40A Current Rating, 3P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3264
  • Mfr. Part No. A9DA3740
Each
HK$6,466.00
Eaton 40A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8642P
  • Mfr. Part No. 40NHG000B
Each (Supplied in a Box)
HK$31.90
Schurter 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 600V ac
  • RS Stock No. 712-4796P
  • Mfr. Part No. 0091.0002
Each (Supplied in a Box)
HK$244.00
Eaton xEffect FAZ MCB, 3P, 1.5A Curve B, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 247-878
  • Mfr. Part No. 132713 FAZ-B1,5/3-NA
Each
HK$1,534.62
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 25A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2323
  • Mfr. Part No. A9F07225
Each
HK$906.67
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-617
  • Mfr. Part No. 3VA9673-0JJ44
1 Kit
HK$3,117.60
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