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

206 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3913
  • Mfr. Part No. 3VA2063-8KQ32-0AA0
Each
HK$19,333.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-5042
  • Mfr. Part No. 3VA1180-4ED42-0AA0
Each
HK$4,187.90
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 236-6721
  • Mfr. Part No. 1SDA068370R1 XT4L 160 TMA 50A FF
Each
HK$7,011.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3758
  • Mfr. Part No. 3VA2040-6KQ36-0AA0
Each
HK$14,198.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3904
  • Mfr. Part No. 3VA2063-8JP46-0AA0
Each
HK$18,418.50
In Stock
Littelfuse 30A Green Blade Car Fuse, 32V dc
  • RS Stock No. 219-3564
  • Mfr. Part No. 0299030.TXN
Each (In a Pack of 10)
HK$23.51
In Stock
WAGO Electronic Circuit Breaker 10A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 303-271
  • Mfr. Part No. 787-3861/400-1000
Each
HK$432.90
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4710
  • Mfr. Part No. 1SDA072987R1
Each
HK$117,633.45
Temporarily out of stock
Siemens 30A Cartridge Fuse, 14 X 51mm
  • RS Stock No. 665-091
  • Mfr. Part No. 3NC1430-5
1 Pack of 10
HK$2,110.00
Temporarily out of stock
Eaton 16A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 260-756
  • Mfr. Part No. 7.2TDLSJ16
1 Pack of 3
HK$6,118.80
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-7637
  • Mfr. Part No. C11H4TM063L
Each
HK$7,807.63
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 40A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2377
  • Mfr. Part No. M9F22340
Each
HK$580.10
Temporarily out of stock
SENTRON for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-607
  • Mfr. Part No. 3VA9477-0CK12
1 Kit
HK$5,740.30
In Stock
Eaton xEffect MCB, 1+N, 32A Curve C
  • RS Stock No. 230-0975
  • Mfr. Part No. 239081 FAZ6-C32/1N
Each
HK$202.62
In Stock
Littelfuse SMD Non Resettable Fuse 2A, 125V
  • RS Stock No. 787-4328P
  • Mfr. Part No. 0449002.MR
Each (Supplied on a Reel)
HK$12.48
Temporarily out of stock
SENTRON Shunt Trip Voltage Release for use with 3VA4/5/6 Series
  • RS Stock No. 263-701
  • Mfr. Part No. 3VA9978-0BL20
Each
HK$859.80
In Stock
Schurter PC Board Non Resettable Fuse, Radial 315mA, 250V ac
  • RS Stock No. 284-5287
  • Mfr. Part No. 0034.6610
Each (In a Pack of 10)
HK$2.45
In Stock
Mersen 20A NH Fuse, NH000, 500V ac
  • RS Stock No. 375-9531
  • Mfr. Part No. A222847C
Each (In a Pack of 3)
HK$63.867
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 209-4853
  • Mfr. Part No. 3VA1110-3EE42-0AA0
Each
HK$4,865.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4326
  • Mfr. Part No. 3VA1150-4EF36-0AA0
Each
HK$3,709.10
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