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

90 of 999+
Schneider Electric 32A Fuse Holder for 70 x 61mm Fuse, 3P+N, 690V
  • RS Stock No. 654-627
  • Mfr. Part No. DF103NV
Each
HK$512.10
ABB S800C MCB, 1P, 16A Curve K, 240V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-314
  • Mfr. Part No. 2CCS881001R0467
Each
HK$1,290.87
Better World
Siemens SENTRON 5SL6 MCB, 3+N, 40A Curve C
  • RS Stock No. 216-5926
  • Mfr. Part No. 5SL6440-7
Each
HK$1,790.10
Schurter 16A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 600V ac
  • RS Stock No. 167-6951
  • Mfr. Part No. 0751.0056
1 Bag of 20
HK$25.70
Schurter PC Board Non Resettable Fuse, Axial 2A, 250 V ac, 125V dc
  • RS Stock No. 216-4099
  • Mfr. Part No. 7010.1860.12
Each (In a Pack of 5)
HK$83.88
Schneider Electric, PowerPact MCCB 3P 600A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 341-448
  • Mfr. Part No. NLJL36600U31X
Each
HK$93,504.87
Legrand DX3 RCD, 20A, 1+N Pole, 30mA, Type C
  • RS Stock No. 731-9893
  • Mfr. Part No. 4 108 02
Each
HK$3,515.32
Schneider Electric Acti9 Acti9 iC60 MCB, 2P, 63A, Type AC, 500V AC, 1000 mA Breaking Capacity
  • RS Stock No. 428-831
  • Mfr. Part No. A9V19263
Each
HK$5,618.92
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-201
  • Mfr. Part No. 3VA6610-6KL42-0AA0
Each
HK$91,239.90
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-793
  • Mfr. Part No. A9DE3632
Each
HK$2,845.00
Eaton 25A Bottle Fuse, 500V ac
  • RS Stock No. 228-721
  • Mfr. Part No. 25D27R FUSE-D2 25A F GR 500VAC E27
1 Pack of 5
HK$355.50
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0312
  • Mfr. Part No. 8GK1072-2KK21
Each
HK$6,788.10
ABB PS1 1 Phase Busbar, 400V ac, 17.5mm Pitch
  • RS Stock No. 489-6489
  • Mfr. Part No. 2CDL210001R1012
Each
HK$67.20
Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 6 kA, Fixed Mount
  • RS Stock No. 253-187
  • Mfr. Part No. 192358 NZMS3-PX400
Each
HK$31,564.60
Siemens SENTRON 5SJ4318 MCB, 3P, 15A Curve C, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 300-078
  • Mfr. Part No. 5SJ4318-7HG41
Each
HK$1,722.60
Eaton 50A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 254-753
  • Mfr. Part No. 24TDMEJ50
Each
HK$2,503.10
Schneider Electric Acti9 Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 599-662
  • Mfr. Part No. A9XPH208
1 Pack of 10
HK$1,668.20
Schneider Electric, PowerPact MCCB 1P 40A, Breaking Capacity 35 kA, Clip-On
  • RS Stock No. 341-583
  • Mfr. Part No. BGL16040
Each
HK$5,014.75
Better World
Schneider Electric Flexible Elbow Busbar Trunking, 63A, Canalis KN Series
  • RS Stock No. 211-0419
  • Mfr. Part No. KNA63DL4
Each
HK$2,081.50
ABB S800U MCB, 2P, 80A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 141-175
  • Mfr. Part No. 2CCS862017R0627
Each
HK$6,800.89
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