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

34912 Products showing for Fuses & Circuit Breakers

74 of 999+
ABB S202M 2CDS2720 MCB, 2P, 16A Curve B, 440V AC, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 100-091
  • Mfr. Part No. 2CDS272061R0165
1 Box of 1
$453.83(exc. GST)
Eaton 1.25A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-648
  • Mfr. Part No. LP-CC-1-1/4
1 Pack of 10
$1,138.17(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4168
  • Mfr. Part No. 3VA1110-4EE36-0AA0
Each
$1,124.70(exc. GST)
Schneider Electric Acti9 3, 3+N Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 336-623
  • Mfr. Part No. SEA9BN24PS
Each
$1,682.46(exc. GST)
Siemens SENTRON 5SY7 MCB, 4P, 10A Curve D, 400V AC, 60V DC, 30 kA Breaking Capacity
  • RS Stock No. 610-688
  • Mfr. Part No. 5SY7410-8
Each
$558.35(exc. GST)
Better World
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-9907
  • Mfr. Part No. 1SDA070754R1
Each
$8,877.02(exc. GST)
RS PRO PC Board Non Resettable Fuse, Radial 400mA, 250V ac
  • RS Stock No. 767-5024
Each (In a Pack of 10)
$1.441(exc. GST)
Schneider Electric, PowerPact MCCB 3P 20A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 205-284
  • Mfr. Part No. NHGF36020TW
Each
$2,569.64(exc. GST)
RS PRO 15A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V
  • RS Stock No. 237-5266
Each
$9.06(exc. GST)
Phoenix Contact PTCB Electronic Circuit Breaker 2A 48V PTCB E1, 1 channels , DIN Rail
  • RS Stock No. 488-222
  • Mfr. Part No. 1471918
Each
$94.56(exc. GST)
Eaton 2A Grey Blade Car Fuse, 32V dc
  • RS Stock No. 849-5620
  • Mfr. Part No. ATC-2
Each
$7.32(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 3 channels
  • RS Stock No. 155-807
  • Mfr. Part No. 3VA2325-8HN32-0AA0
Each
$6,393.49(exc. GST)
Schneider Electric, Compact MCCB 3P 800A, Breaking Capacity 75 kA, Fixed Mount
  • RS Stock No. 340-921
  • Mfr. Part No. C080B3FM
Each
$8,866.46(exc. GST)
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3081
  • Mfr. Part No. 1SDA070935R1
Each
$13,009.47(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 30A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-340
  • Mfr. Part No. 3VA5130-6ED21-1AA0
Each
$1,589.91(exc. GST)
Schneider Electric, ComPacT MCCB 4P 50A, Fixed Mount
  • RS Stock No. 260-7543
  • Mfr. Part No. C11B4TM050L
Each
$1,366.18(exc. GST)
Schneider Electric, PowerPact Circuit breaker 3P 125A, Breaking Capacity 18 kA, Screw Mount
  • RS Stock No. 578-268
  • Mfr. Part No. BGL36125LU
Each
$1,395.44(exc. GST)
Eaton 45A British Standard Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS Stock No. 156-8951
  • Mfr. Part No. 45FE
Each
$232.07(exc. GST)
Schneider Electric RCBO, 45A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-085
  • Mfr. Part No. A9D05845
Each
$411.61(exc. GST)
Phoenix Contact Surge Protector, 5kA, 3.5kV
  • RS Stock No. 265-7475
  • Mfr. Part No. 2404297
Each
$408.44(exc. GST)
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