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

12 of 999+
Littelfuse 1.1A Resettable Fuse, 6V dc
  • RS Stock No. 517-7262P
  • Mfr. Part No. MICROSMD110F-2
Each (Supplied on a Reel)
HK$2.465
Schurter Surface Mount Fuse 1A, 250V ac
  • RS Stock No. 270-7953
  • Mfr. Part No. 3404.2416.11
Each
HK$6.60
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 300mA, Type B, 400V ac
  • RS Stock No. 211-9703
  • Mfr. Part No. 5SV3646-5
Each
HK$12,238.80
Europa EUC1P EUB MCB, 1P, 1A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6459
  • Mfr. Part No. EUC1P1B
Each
HK$76.80
Littelfuse 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4375
  • Mfr. Part No. 0217001.MXP
Each (In a Pack of 10)
HK$2.94
Eaton 10A Red, White Fast Acting Car Fuse, 60 V dc, 125V ac With Indicator
  • RS Stock No. 848-3879
  • Mfr. Part No. GMT-10A
Each
HK$155.30
Schneider Electric for use with ComPact NS630b → 1600 Circuit Breaker
  • RS Stock No. 247-1758
  • Mfr. Part No. 33195
Each
HK$570.60
Better World
Siemens Sentron 5SY6 MCB, 1P, 500mA Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 521-4989
  • Mfr. Part No. 5SY6105-7
Each
HK$185.50
ABB Front Terminal for use with XT1 Cables
  • RS Stock No. 192-0878
  • Mfr. Part No. 1SDA067152R1
Each
HK$496.88
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 40A, Fixed Mount
  • RS Stock No. 232-0245
  • Mfr. Part No. 1SDA067393R1 XT1C 160 TMD 40A FF
Each
HK$2,523.28
WJ Furse Copper Earth Bar L. 400mm x W. 90mm x H. 90mm 6 Ways
  • RS Stock No. 124-2496
  • Mfr. Part No. 7TCA083670R0739 LK245-6
Each
HK$1,921.50
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 30mA, Type A
  • RS Stock No. 124-7723
  • Mfr. Part No. 5SV3344-6KK12
Each
HK$813.40
Littelfuse Inline Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 787-4350P
  • Mfr. Part No. 277.6106.0002
Each (Supplied in a Bag)
HK$29.10
Eaton 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7089
  • Mfr. Part No. MDA-5-R
Each
HK$70.90
Eaton 630mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3826
  • Mfr. Part No. GDC-630MA
Each
HK$42.70
Phoenix Contact TRABTECH Electronic Circuit breaker 3A 24V CB E1, On Base Element
  • RS Stock No. 768-1104
  • Mfr. Part No. 2800917
Each
HK$375.60
Schneider Electric 16 Way Metal Consumer Unit, 100A, IP2X, IP3X EZ9E
  • RS Stock No. 654-696
  • Mfr. Part No. EZ9E16MCCU
Each
HK$751.75
Better World
Siemens SENTRON 3VA1 MCB, 3P, 125A
  • RS Stock No. 224-7796
  • Mfr. Part No. 3VA1112-1AA32-0AA0
Each
HK$2,342.10
Mersen 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7044
  • Mfr. Part No. F222208
Each (In a Pack of 10)
HK$14.27
Siemens 4A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2041
  • Mfr. Part No. 3NW6004-1
Each (In a Pack of 10)
HK$51.19
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