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

2456 of 999+
Temporarily out of stock
Siemens SENTRON 5SJ MCB, 1P, 35A
  • RS Stock No. 232-2243
  • Mfr. Part No. 5SJ4135-6HG40
Each
SGD108.71(exc. GST)
Temporarily out of stock
ABB S-ARC1 MCB, 1+N, 20A Curve B, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 175-9931
  • Mfr. Part No. 2CSA255901R9205 S-ARC1 B20
Each
SGD300.58(exc. GST)
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA13/14, 3VA23/24
  • RS Stock No. 153-376
  • Mfr. Part No. 3VA9304-0JF60
Each
SGD309.97(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4200
  • Mfr. Part No. 3VA1116-4ED36-0AA0
Each
SGD1,417.27(exc. GST)
Temporarily out of stock
Eaton 63A Tag Fuse, 01XL, 1.5kV, 189mm
  • RS Stock No. 282-6544
  • Mfr. Part No. PV-63A-01XL-15
Each
SGD583.22(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 3 channels
  • RS Stock No. 157-240
  • Mfr. Part No. 3VA2163-8KQ32-0AA0
Each
SGD3,048.79(exc. GST)
Temporarily out of stock
ABB F200 RCCB, 40A, 2 Pole, Type A, 230/400V ac
  • RS Stock No. 177-5084
  • Mfr. Part No. 2CSF202201R5400
Each
SGD419.10(exc. GST)
Temporarily out of stock
Schurter SMD Non Resettable Fuse 630mA, 125 V dc, 250V ac
  • RS Stock No. 173-8105
  • Mfr. Part No. 3404.2464.22
1 Reel of 1000
SGD1,411.20(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LI, 4 channels
  • RS Stock No. 259-3551
  • Mfr. Part No. 1SDA071531R1
Each
SGD10,581.79(exc. GST)
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