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

171 of 999+
Temporarily out of stock
Hager ARC MCB, 20A, 3 Breaking Capacity
  • RS Stock No. 602-198
  • Mfr. Part No. ARC720F
Each
HK$2,278.80
Temporarily out of stock
Eaton NZM Auxiliary Contact for use with Circuit Breaker
  • RS Stock No. 246-808
  • Mfr. Part No. 189748 NZM2/3-XHIV-PI
Each
HK$723.59
Temporarily out of stock
Wickmann 0.12A Resettable Fuse, 48V dc
  • RS Stock No. 174-0407
  • Mfr. Part No. RF1343-000
1 Reel of 15000
HK$42,097.60
In Stock
Eaton xEffect MCB, 16A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4407
  • Mfr. Part No. 239158 FAZ6-B16/3N
Each
HK$1,449.60
In Stock
Europa EUC3P EUC MCB, 3P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6572
  • Mfr. Part No. EUC3P1C
Each
HK$181.40
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 25A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6668
  • Mfr. Part No. 5SY4625-7
Each
HK$1,448.80
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 6A Curve C, 500V DC
  • RS Stock No. 772-1515
  • Mfr. Part No. A9N61526
Each
HK$1,497.30
Temporarily out of stock
Siemens, SENTRON MCCB 4P 175A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-469
  • Mfr. Part No. 3VA5217-5GD41-2AA0
Each
HK$18,132.80
Temporarily out of stock
Eaton 32A Fuse Holder for 118 x 61 x 32mm Fuse, 1P, 690V
  • RS Stock No. 261-316
  • Mfr. Part No. CM32FW
1 Pack of 10
HK$3,141.80
Temporarily out of stock
Siemens 16A Base Mount Fuse Holder for D01 Fuse, 3P, 400V
  • RS Stock No. 156-048
  • Mfr. Part No. 5SG5302-1
1 Pack of 5
HK$1,455.50
Temporarily out of stock
Eaton 16A Base Mount Fuse Holder for D01mm Fuse, 1P, 400V
  • RS Stock No. 260-749
  • Mfr. Part No. FRN01-SB
1 Pack of 15
HK$1,375.60
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 1P, 16A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7182
  • Mfr. Part No. 5SJ4116-7HG41
Each
HK$478.70
Temporarily out of stock
Better World
Siemens 3VA94 RCD, 630A, 4 Pole, Type A
  • RS Stock No. 218-1855
  • Mfr. Part No. 3VA9424-0RL30
Each
HK$16,926.80
Temporarily out of stock
Schneider Electric Tee Elbow Busbar Trunking, 290mm, 630A, KSA Series
  • RS Stock No. 655-016
  • Mfr. Part No. KSA630DLC401
Each
HK$20,127.40
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 63A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-702
  • Mfr. Part No. IL0633P36
Each
HK$5,206.20
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 200-511
  • Mfr. Part No. 1STQ007410A0000
Each
HK$7,104.80
Temporarily out of stock
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-407
  • Mfr. Part No. 3VA5210-7ED31-2AA0
Each
HK$8,041.40
Temporarily out of stock
Eaton 63A Rail Mount Fuse Holder Base, 3P, 690V ac
  • RS Stock No. 231-652
  • Mfr. Part No. 110395 DIII-SO/63/3-R-PS
1 Pack of 10
HK$1,777.80
Temporarily out of stock
Siemens SENTRON Two Phase Busbar, 1mm Pitch
  • RS Stock No. 627-141
  • Mfr. Part No. 5ST3664-1HG
1 Pack of 10
HK$1,525.30
In Stock
Schurter Tin Plated Brass PCB Mount Fuse Clip for 5 x 20mm
  • RS Stock No. 484-8272
  • Mfr. Part No. 0751.0142
Each (In a Pack of 20)
HK$6.865
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