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

2451 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB 2P 175A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-485
  • Mfr. Part No. 3VA5217-6ED61-0AA0
Each
SGD1,490.17(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 125A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-258
  • Mfr. Part No. 3VA5112-5ED21-1AA0
Each
SGD869.56(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 110A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-508
  • Mfr. Part No. 3VA5111-6EC31-1AA0
Each
SGD800.03(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5140
  • Mfr. Part No. 3VA2116-6JQ32-0AA0
Each
SGD3,107.86(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3579
  • Mfr. Part No. 3VA2010-7HN46-0AA0
Each
SGD1,581.31(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 3 channels
  • RS Stock No. 157-302
  • Mfr. Part No. 3VA2216-0MN32-0AA0
Each
SGD1,844.20(exc. GST)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 377-2180P
  • Mfr. Part No. 3821315041
Each (Supplied in a Bag)
SGD2.499(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-458
  • Mfr. Part No. 3VA5215-7EC41-0AA0
Each
SGD2,246.59(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 70 kA
  • RS Stock No. 209-6810
  • Mfr. Part No. 3VA1132-6EF42-0AA0
Each
SGD614.03(exc. GST)
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 Single Pole Panel Mount, 2A Current Rating
  • RS Stock No. 275-0417
  • Mfr. Part No. M39019/02-218
Each
SGD1,471.45(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 55 kA
  • RS Stock No. 209-6977
  • Mfr. Part No. 3VA1116-5EF46-0AA0
Each
SGD1,956.85(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3866
  • Mfr. Part No. 3VA2063-7HN36-0AA0
Each
SGD1,433.26(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4224
  • Mfr. Part No. 1SDA072348R1
Each
SGD14,299.68(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 147-710
  • Mfr. Part No. 3VA5180-5EC31-1AA0
Each
SGD512.26(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - LELZXB1 Single Pole Panel Mount, 15A Current Rating
  • RS Stock No. 275-0405
  • Mfr. Part No. LELZXB1-1REC4-61-15.0-G1-03
1 Box of 5
SGD686.27(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3446
  • Mfr. Part No. 1SDA071389R1
Each
SGD14,158.19(exc. GST)
Temporarily out of stock
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0930
  • Mfr. Part No. 3WA9111-0EK42
1 Set
SGD262.56(exc. GST)
In Stock
Schurter SMD Non Resettable Fuse 3A, 125V ac/dc
  • RS Stock No. 733-4886
  • Mfr. Part No. 3404.0118.22
Each (In a Bag of 5)
SGD0.798(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA
  • RS Stock No. 209-6979
  • Mfr. Part No. 3VA1116-6EE42-0AA0
Each
SGD1,207.88(exc. GST)
Currently unavailable
Schurter SMD Non Resettable Fuse 25A, 72 V dc, 250V ac
  • RS Stock No. 144-1809
  • Mfr. Part No. 3403.0288.23
1 Reel of 1500
SGD3,483.90(exc. GST)
1
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