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

35151 Products showing for Fuses & Circuit Breakers

252 of 999+
Schneider Electric, ComPacT New Generation MCCB 4P 250A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 207-155
  • Mfr. Part No. C40K42D250
Each
$10,445.01(exc. GST)
Schneider Electric, Compact MCCB 4P 800A, Breaking Capacity 30 kA
  • RS Stock No. 340-880
  • Mfr. Part No. C080N4WM
Each
$7,619.57(exc. GST)
Eaton xEnergy Basic Distribution Board Enclosure
  • RS Stock No. 251-424
  • Mfr. Part No. 193180 BP-O-1100/11-EP-W
Each
$1,940.16(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9631
  • Mfr. Part No. 3VA10964ED360AA0
Each
$827.06(exc. GST)
Siemens 25A Tag Fuse, 78.5mm, 690V
  • RS Stock No. 608-659
  • Mfr. Part No. 3NE8815-0MK
1 Pack of 3
$222.88(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 270-009
  • Mfr. Part No. 3VA6115-7JT31-0AA0
Each
$5,381.89(exc. GST)
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA, Cable Mount
  • RS Stock No. 249-198
  • Mfr. Part No. 3VA6610-7JQ46-0AA0
Each
$31,842.80(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 260-627
  • Mfr. Part No. 3VA6325-6KP41-2AA0
Each
$11,324.38(exc. GST)
Schneider Electric RCBO, 25A Current Rating, 1P Poles, Type B, Acti9 Range
  • RS Stock No. 207-168
  • Mfr. Part No. A9D56825
Each
$495.97(exc. GST)
FUSE 250V IEC TL LBC TR5 SL .250A
  • RS Stock No. 565-392
  • Mfr. Part No. 37202500431
Each
$374.62(exc. GST)
Siemens SENTRON 2 Phase Busbar, 27mm Pitch
  • RS Stock No. 187-5174
  • Mfr. Part No. 5ST3635
Each
$22.40(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 110A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-182
  • Mfr. Part No. 3VA5111-4EC31-0AA0
Each
$1,742.19(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - 219 3 Pole 480V ac Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 275-0069
  • Mfr. Part No. 219-3-1-66-5-8-15
Each
$640.62(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-895
  • Mfr. Part No. 3VA6110-6JT31-0AA0
Each
$4,036.41(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 80A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-592
  • Mfr. Part No. 3VA5280-6ED61-0AA0
Each
$1,968.89(exc. GST)
Eaton NZM Jumper Link for use with N3-4-…-S1(-S15)-DC
  • RS Stock No. 129-043
  • Mfr. Part No. 142269 NZM3-4-XKVI2P
Each
$782.21(exc. GST)
Siemens SENTRON 5SY4 MCB, 3P, 4A, Type A, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-314
  • Mfr. Part No. 5SY4304-5
Each
$429.14(exc. GST)
Siemens 800A Tag Fuse, 151mm, 600V
  • RS Stock No. 608-745
  • Mfr. Part No. 3NE1438-1
1 Pack of 3
$1,633.52(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-620
  • Mfr. Part No. 3VA5140-4ED31-0AA0
Each
$1,102.07(exc. GST)
Legrand 50A Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 266-3176
  • Mfr. Part No. 0 155 50
1 Box of 10
$527.18(exc. GST)
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