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

2452 of 999+
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3731
  • Mfr. Part No. 3VA2040-5JP42-0AA0
Each
SGD1,803.11(exc. GST)
Siemens SIRIUS Enclosure for use with 3SE7
  • RS Stock No. 161-295
  • Mfr. Part No. 3SE7310-1AE04
Each
SGD1,195.39(exc. GST)
Eaton RCBO, 6A Current Rating, 3P Poles, 100mA Trip Sensitivity, Type A, Type D, FRBmM Range
  • RS Stock No. 123-297
  • Mfr. Part No. 170749 FRBMM-D6/3/01-A
Each
SGD374.86(exc. GST)
ABB AC Switch Disconnectors Accessories Interlock for use with Switch Fuses
  • RS Stock No. 259-9727
  • Mfr. Part No. 1SCA106526R1001
Each
SGD278.37(exc. GST)
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-9954
  • Mfr. Part No. 1SDA070833R1
Each
SGD8,323.67(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 4 channels
  • RS Stock No. 155-794
  • Mfr. Part No. 3VA2340-6JQ42-0AA0
Each
SGD4,511.74(exc. GST)
RS PRO 160A Bolted Tag Fuse, 350 V dc, 690V ac, 70mm
  • RS Stock No. 221-3669
Each (In a Pack of 2)
SGD40.255(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - 209 3 Pole 240V ac Voltage Rating Panel Mount, 60A Current Rating
  • RS Stock No. 275-0063
  • Mfr. Part No. 209-3-1-63-4-2-60-H-V
Each
SGD434.91(exc. GST)
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-9539
  • Mfr. Part No. C10R42D040
Each
SGD2,529.93(exc. GST)
ABB S801S MCB, 1P, 32A, UC-B, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-457
  • Mfr. Part No. 2CCS861001R1325
Each
SGD194.34(exc. GST)
Eaton NZM3-4 Cover for use with N3-4, NZM3-4
  • RS Stock No. 229-796
  • Mfr. Part No. 119871 NZM3-4-XKSAE
Each
SGD76.13(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 100A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-738
  • Mfr. Part No. 3VA5110-4ED11-1AA0
Each
SGD283.72(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 4 channels
  • RS Stock No. 156-705
  • Mfr. Part No. 3VA2325-6JP42-0AA0
Each
SGD4,057.90(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3534
  • Mfr. Part No. 3VA1463-7GF42-0AA0
Each
SGD4,142.76(exc. GST)
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 221-5635
  • Mfr. Part No. 3-128-239
Each
SGD27.26(exc. GST)
Eaton RCBO, 13A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type B, FRBDM Range
  • RS Stock No. 120-941
  • Mfr. Part No. 168214 FRBDM-B13/2/01-G/A
Each
SGD367.17(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 7 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-263
  • Mfr. Part No. 3VA5112-5GC41-0AA0
Each
SGD1,229.84(exc. GST)
Eaton 125A Bolted Tag Fuse, 31 x 91mm, 415V ac
  • RS Stock No. 182-1431
  • Mfr. Part No. ODD125
Each (In a Box of 6)
SGD46.40(exc. GST)
Siemens SENTRON Cover Frame for use with 3VA55/65/66
  • RS Stock No. 162-029
  • Mfr. Part No. 3VA9583-0SB20
Each
SGD146.49(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3785
  • Mfr. Part No. 3VA2040-7KP42-0AA0
Each
SGD2,198.98(exc. GST)
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