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

46336 Products showing for Fuses & Circuit Breakers

2308 of 999+
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
In Stock
RS PRO 8A aR Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 199-250
1 Pack of 10
HK$1,647.87
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
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 50A Curve B, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2244
  • Mfr. Part No. A9F06650
Each
HK$796.29
Temporarily out of stock
Eaton 800A Cartridge Fuse, 81 x 143mm
  • RS Stock No. 261-639
  • Mfr. Part No. GSGB800
Each
HK$4,491.20
Temporarily out of stock
Eaton RCCB, 80A, 4 Pole, 300mA, Type A, 230 V ac, 400 V ac
  • RS Stock No. 203-9035
  • Mfr. Part No. 102879 PXF-80/4/03-A
Each
HK$5,211.37
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9745
  • Mfr. Part No. 3VA1112-6GD42-0AA0
Each
HK$8,236.80
Temporarily out of stock
Electronic Circuit Breaker 10.4A 30V , 1 channels , DIN Rail
  • RS Stock No. 263-097
  • Mfr. Part No. PXS24E10A002 PXS24E-e10/F
Each
HK$444.60
Temporarily out of stock
NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 253-186
  • Mfr. Part No. 192355 NZMN3-PX400
Each
HK$29,451.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3676
  • Mfr. Part No. 3VA2025-7HN46-0AA0
Each
HK$21,974.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9439
  • Mfr. Part No. 3VA1180-6GF46-0AA0
Each
HK$6,086.50
Temporarily out of stock
Eaton 400A 3.92 x 3.93in Modular Fuse Fuse Block, 2.5kV
  • RS Stock No. 261-439
  • Mfr. Part No. BH-1132
Each
HK$3,339.50
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