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

49110 Products showing for Fuses & Circuit Breakers

2447 of 999+
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1.25A, 250V
  • RS Stock No. 767-5115
Each (In a Pack of 10)
SGD0.816(exc. GST)
Temporarily out of stock
Eaton RCBO, 20A Current Rating, 2P Poles, 10mA Trip Sensitivity, Type A, Type C, FRBdM Range
  • RS Stock No. 121-002
  • Mfr. Part No. 168301 FRBDM-C20/2/001-G/A
Each
SGD413.30(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 2P 225A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-345
  • Mfr. Part No. 3VA5222-7ED61-0AA0
Each
SGD1,855.86(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 225A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-328
  • Mfr. Part No. 3VA5222-6GC41-2AA0
Each
SGD2,606.28(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA2, 3 channels
  • RS Stock No. 156-642
  • Mfr. Part No. 3VA2463-8HM32-0AA0
Each
SGD4,478.01(exc. GST)
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 45A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-069
  • Mfr. Part No. 3RV2431-4VA10
Each
SGD425.62(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 40A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-618
  • Mfr. Part No. 3VA5140-4ED21-0AA0
Each
SGD363.60(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2064
  • Mfr. Part No. 3120-N521-H7T1-W01D-10A-U0000M
Each
SGD97.07(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 3 channels Type N
  • RS Stock No. 157-129
  • Mfr. Part No. 3VA2163-5HK32-0AA0
Each
SGD789.68(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4329
  • Mfr. Part No. 1SDA072494R1
Each
SGD20,461.52(exc. GST)
Temporarily out of stock
Eaton 600A Tag Fuse, 205 x 75 x 75mm, 1kV, 205mm
  • RS Stock No. 282-6252
  • Mfr. Part No. PV-600A-3L
Each
SGD1,231.94(exc. GST)
Temporarily out of stock
Socomec 20A F Cartridge Fuse, 14 x 51mm
  • RS Stock No. 223-2752
  • Mfr. Part No. 170L1420
Each (In a Pack of 10)
SGD14.413(exc. GST)
In Stock
Phoenix Contact CB PT BRIDGE Plug In Bridge for use with CB Base Element
  • RS Stock No. 129-882
  • Mfr. Part No. 2801014
Each
SGD19.54(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9746
  • Mfr. Part No. 3VA1112-6GD46-0AA0
Each
SGD1,017.86(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LSI, 4 channels
  • RS Stock No. 259-4596
  • Mfr. Part No. 1SDA072855R1
Each
SGD8,885.70(exc. GST)
Temporarily out of stock
Eaton RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type D, FRBdM Range
  • RS Stock No. 121-037
  • Mfr. Part No. 168291 FRBDM-D16/1N/01-G/A
Each
SGD321.04(exc. GST)
Temporarily out of stock
ABB S804S MCB, 4P, 80A, UC-K, 750V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-337
  • Mfr. Part No. 2CCS864001R1627
Each
SGD1,239.00(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA
  • RS Stock No. 209-7039
  • Mfr. Part No. 3VA2010-6JQ32-0AA0
Each
SGD1,943.00(exc. GST)
In Stock
Schneider Electric Acti 9 Acti9 iDT40K XA MCB, 3+N, 25A Curve C, 230V AC
  • RS Stock No. 238-3451
  • Mfr. Part No. A9PK1725
Each
SGD426.09(exc. GST)
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 1A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-205
  • Mfr. Part No. 3RV2421-0JA10
Each
SGD138.11(exc. GST)
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