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

2354 of 999+
Temporarily out of stock
Eaton xEffect MCB, 1P, 1.5A Curve D
  • RS Stock No. 230-0990
  • Mfr. Part No. 177394 FAZ6-D1,5/1
Each
HK$324.50
Temporarily out of stock
Socomec 1.6kA Tag Fuse, NH3, 690V, 150mm
  • RS Stock No. 252-5306
  • Mfr. Part No. 170M6469
Each
HK$5,374.04
Currently unavailable
Limitor Thermal Fuse +70°C 2.5 A, 250V ac
  • RS Stock No. 204-7405
  • Mfr. Part No. Q82 A 70 05 100
Each
HK$36.70
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 231-146
  • Mfr. Part No. 113363 NZMH2-M160-SVE
Each
HK$13,309.30
Temporarily out of stock
Wickmann 0.75A Resettable Fuse, 24V dc
  • RS Stock No. 174-0787
  • Mfr. Part No. 1812L075/24DR
Each (In a Pack of 20)
HK$3.725
In Stock
Better World
Schneider Electric Acti 9 A9F9 MCB, 2P, 32A, Type Z, 400V AC, 125V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 211-2491
  • Mfr. Part No. A9F92232
Each
HK$1,093.36
Temporarily out of stock
Eaton Eaton Moeller Series NZM Terminal Element for use with N(S)1-4, NZM1-4, PN1-4
  • RS Stock No. 256-113
  • Mfr. Part No. 266725 NZM1-4-XKS
Each
HK$378.10
Temporarily out of stock
630A Ceramic Cartridge Fuse, 130 x 220mm
  • RS Stock No. 262-263
  • Mfr. Part No. 630NHG4G 500V 630A NH4 FUSE gG
Each
HK$1,596.70
In Stock
Sato Parts F-700 Series Fuse Cover for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse
  • RS Stock No. 229-4970
  • Mfr. Part No. F-700-FC2
Each
HK$19.08
Temporarily out of stock
Sato Parts 10A Rail Mount Fuse Holder for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse, 1P, 250V
  • RS Stock No. 229-4966
  • Mfr. Part No. F-700-AL
Each
HK$77.30
Temporarily out of stock
250A Fuse Holder for 280 x 170mm Fuse, 3P, 690V
  • RS Stock No. 262-027
  • Mfr. Part No. EBH113TTV1
Each
HK$2,616.40
Temporarily out of stock
NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 253-189
  • Mfr. Part No. 192361 NZMH3-PX400
Each
HK$35,362.70
Temporarily out of stock
Eaton 125A Cartridge Fuse, 88 x 442mm
  • RS Stock No. 255-492
  • Mfr. Part No. 24TXMEJ125
Each
HK$7,025.30
Temporarily out of stock
Eaton 160A Fuse Holder for 135 x 715mm Fuse, 3P, 690V
  • RS Stock No. 261-888
  • Mfr. Part No. EBV0033SV0
Each
HK$1,524.50
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 10A Curve B, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3256
  • Mfr. Part No. A9F53410
Each
HK$1,456.90
Temporarily out of stock
Lovato 3 Phase Surge Protector, 40kA
  • RS Stock No. 216-8309
  • Mfr. Part No. SG2DGK10M3
Each
HK$2,187.69
Temporarily out of stock
Lovato 3 Phase Surge Protector, 50kA
  • RS Stock No. 216-8302
  • Mfr. Part No. SG23NA300
Each
HK$2,826.72
Temporarily out of stock
Lovato 1 Phase Surge Protector, 50kA
  • RS Stock No. 216-8286
  • Mfr. Part No. SA0B1NA320R
Each
HK$3,097.10
Temporarily out of stock
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4780
  • Mfr. Part No. 3VA2510-6HK32-0AA0
Each
HK$94,609.30
Currently unavailable
Socomec Fuse Holder Neutral Terminal
  • RS Stock No. 252-3745
  • Mfr. Part No. 17499001
Each
HK$56.45
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