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

151 of 999+
In Stock
Phoenix Contact Electronic Circuit Breaker
  • RS Stock No. 252-5377
  • Mfr. Part No. 1115657
Each
HK$974.60
Limited stock
Limitor Fuse Clip
  • RS Stock No. 204-7629
  • Mfr. Part No. CLIP C BUGEL
Each (In a Pack of 10)
HK$4.61
New product - Preorder today
Schneider Electric R9R RCCB, 63A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 654-678
  • Mfr. Part No. R9R22463
Each
HK$3,697.07
In Stock
Eaton 25A 6.3 x 32mm Fuse Block, 250V ac
  • RS Stock No. 233-0597
  • Mfr. Part No. BK2-S-4201-1X-R
Each (In a Pack of 10)
HK$10.85
Temporarily out of stock
Eaton 15A 0.001 x 0.001in Open Fuse Fuse Block, 600V
  • RS Stock No. 229-259
  • Mfr. Part No. BG3012SQ
1 Pack of 8
HK$6,459.60
Temporarily out of stock
Eaton 15A 0.001 x 0.001in Open Fuse Fuse Block, 600V
  • RS Stock No. 228-654
  • Mfr. Part No. BG3012B
1 Pack of 8
HK$14,594.20
Temporarily out of stock
700A 4.133 x 3in Modular Fuse Fuse Block, 1.2kV
  • RS Stock No. 261-877
  • Mfr. Part No. BH-3144
1 Pack of 10
HK$69,481.60
In Stock
Schurter SMD Non Resettable Fuse 2A, 125V ac/dc
  • RS Stock No. 131-476
  • Mfr. Part No. 3404.0012.11
Each (In a Pack of 10)
HK$6.94
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 22A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-243
  • Mfr. Part No. 3RV2821-4CD10
Each
HK$3,232.90
In Stock
Europa EUC3P EUC MCB, 3P, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6594
  • Mfr. Part No. EUC3P20C
Each
HK$276.50
Temporarily out of stock
Hager BS RCCB, 63A, 2P Pole, Type AC
  • RS Stock No. 602-080
  • Mfr. Part No. BS264
Each
HK$3,858.70
In Stock
Eaton 750mA F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 458-8497
  • Mfr. Part No. KTK-3/4
Each (In a Pack of 5)
HK$426.92
Temporarily out of stock
Eaton Mechanical Fuse Monitoring Fuse Kit
  • RS Stock No. 246-738
  • Mfr. Part No. 182997 XNH00-XMFM
1 Pack of 3
HK$574.70
Temporarily out of stock
Hager BFH RCCB, 63A, 4 Pole, 300mA
  • RS Stock No. 602-076
  • Mfr. Part No. BFH863
Each
HK$5,721.20
In Stock
Siemens 500A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6962
  • Mfr. Part No. 3NE1334-2
Each (In a Pack of 3)
HK$3,131.40
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 10A, 2 Pole, 30mA, Type F, 230/400V
  • RS Stock No. 218-884
  • Mfr. Part No. 5TY1350-3MF10
Each
HK$5,722.00
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 63A, 4 Pole, 30mA, Type A, 240/415V ac
  • RS Stock No. 120-322
  • Mfr. Part No. 167103 FRCMM-63/4/003-A-NA
Each
HK$2,591.90
In Stock
Schurter PC Board Non Resettable Fuse, Radial 630mA, 250V ac
  • RS Stock No. 173-9788
  • Mfr. Part No. 0034.6613
Each (In a Bag of 100)
HK$2.062
In Stock
Phoenix Contact Electronic Circuit Breaker 4A 12 → 24V, 1 channels , Plug-On
  • RS Stock No. 269-8048
  • Mfr. Part No. 1157285
Each
HK$447.80
Temporarily out of stock
20A Neutral Link x 5mm
  • RS Stock No. 252-909
  • Mfr. Part No. 20CML
1 Pack of 10
HK$544.90
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