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

128 of 999+
Temporarily out of stock
Hager Hager NKN Circuit Breaker, 2P, 50A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-912
  • Mfr. Part No. NKN250
Each
HK$2,144.80
In Stock
Hager Padlockable Locking Kit for use with MCB, RCBO, RCCB, Trip-Free Switches
  • RS Stock No. 144-4696
  • Mfr. Part No. MZN175
Each (In a Pack of 2)
HK$197.05
Temporarily out of stock
Siemens 3RV1935 Busbar for use with Circuit-Breakers 3RV2
  • RS Stock No. 272-0030
  • Mfr. Part No. 3RV19353A
Each
HK$190.30
Temporarily out of stock
16A Tag Fuse, 22 x 86mm, 0.46/0.66kV, 73mm
  • RS Stock No. 262-607
  • Mfr. Part No. TIA16
1 Pack of 20
HK$2,306.20
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 1P 50A, Breaking Capacity 14 kA, Clip-On
  • RS Stock No. 339-227
  • Mfr. Part No. BDL16050
Each
HK$2,559.90
Temporarily out of stock
25A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-388
  • Mfr. Part No. 36TDQSJ25
Each
HK$3,183.00
Temporarily out of stock
Eaton 80A Cartridge Fuses, 76.2 x 565mm
  • RS Stock No. 254-750
  • Mfr. Part No. 24AFIHA80
Each
HK$12,000.60
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 250-699
  • Mfr. Part No. 192360 NZMH3-PX250
Each
HK$34,632.50
Temporarily out of stock
Eaton Cartridge Fuse, 8 x 3in
  • RS Stock No. 261-464
  • Mfr. Part No. FP-3
Each
HK$790.50
Temporarily out of stock
Eaton 400A Tag Fuse, 225 x 225mm, 690V
  • RS Stock No. 261-705
  • Mfr. Part No. EBH223TTW1
Each
HK$5,335.90
Temporarily out of stock
Eaton xEffect MCB, 2P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4700
  • Mfr. Part No. 239059 FAZ6-C6/1N
Each
HK$579.60
In Stock
Littelfuse 3A Resettable Fuse, 16V
  • RS Stock No. 517-6900
  • Mfr. Part No. RGEF300
Each (In a Pack of 5)
HK$3.34
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 50A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5990
  • Mfr. Part No. 5SL4550-7
Each
HK$959.60
Temporarily out of stock
Siemens SENTRON Base
  • RS Stock No. 277-0708
  • Mfr. Part No. 3WA9111-0AB01
Each
HK$1,157.20
Temporarily out of stock
Hager BF RCCB, 25A, 2P Pole, 300mA, Type A
  • RS Stock No. 602-183
  • Mfr. Part No. BF225
Each
HK$3,745.10
Temporarily out of stock
Wickmann Fuse Block
  • RS Stock No. 174-0748
  • Mfr. Part No. 02540101Z
Each (In a Pack of 5)
HK$9.16
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA
  • RS Stock No. 209-7061
  • Mfr. Part No. 3VA2116-5HN36-0AA0
Each
HK$9,618.60
Temporarily out of stock
Hager NGN MCB, 3P, 6A, 400V AC, 10 Breaking Capacity
  • RS Stock No. 602-157
  • Mfr. Part No. NGN306
Each
HK$1,955.00
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 25A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3395
  • Mfr. Part No. A9F76225
Each
HK$1,151.18
In Stock
nVent ERIFLEX ERIFLEX Busbar Connector
  • RS Stock No. 277-6096
  • Mfr. Part No. 550250
Each (In a Pack of 100)
HK$4.21
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