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

34963 Products showing for Fuses & Circuit Breakers

116 of 999+
In Stock
Siemens 125A NH Fuse, NH2, 500V ac
  • RS Stock No. 396-051
  • Mfr. Part No. 3NA3232
Each (In a Pack of 3)
$55.50(exc. GST)
In Stock
Eaton 16A Fast Acting Cartridge Fuse
  • RS Stock No. 228-714
  • Mfr. Part No. 16D16Q
1 Pack of 10
$62.56(exc. GST)
In Stock
Schneider Electric Distribution Block for use with Linergy DS
  • RS Stock No. 822-8007
  • Mfr. Part No. LGY112510
Each
$98.11(exc. GST)
Temporarily out of stock
Siemens 5SM26 RCCB, 63A, 4 Pole, 300mA, Type AC, 400V
  • RS Stock No. 328-397
  • Mfr. Part No. 5SM2645-0
Each
$331.87(exc. GST)
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 249-011
  • Mfr. Part No. 191585 NZMN3-VX630-T
Each
$7,830.75(exc. GST)
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC 2 Pole 250V ac Voltage Rating DIN Rail, 500mA Current Rating
  • RS Stock No. 135-514
  • Mfr. Part No. 0914947
1 Pack of 3
$843.67(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 131-632
  • Mfr. Part No. 2908209
Each
$343.31(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 3 kA
  • RS Stock No. 245-218
  • Mfr. Part No. 3VA6225-6JQ31-2AA0
Each
$12,552.83(exc. GST)
Limited stock
ABB IEC Range Busbar for use with DDA200, F200, S200
  • RS Stock No. 250-4747
  • Mfr. Part No. 2CDL231001R1006
Each
$10.79(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3413
  • Mfr. Part No. 1SDA071347R1
Each
$18,787.19(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 32A, Fixed Mount
  • RS Stock No. 254-6297
  • Mfr. Part No. C10N3TM032
Each
$1,112.22(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SL60 MCB, 1P + N, 10A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 328-289
  • Mfr. Part No. 5SL6010-6MF
Each
$460.99(exc. GST)
Temporarily out of stock
Eaton 50A Tag Fuse, 22 x 86mm, 0.46/0.66kV, 73mm
  • RS Stock No. 261-419
  • Mfr. Part No. TIS50
1 Pack of 20
$805.12(exc. GST)
In Stock
Eaton 100A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 181-8735
  • Mfr. Part No. C22M100
Each
$12.78(exc. GST)
In Stock
RS PRO 3.15A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9709
Each (In a Pack of 10)
$1.435(exc. GST)
Temporarily out of stock
Eaton 355A Tag Fuse, 660V ac, 111mm
  • RS Stock No. 260-701
  • Mfr. Part No. TMF355
Each
$301.39(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY6 MCB, 3P, 15A Curve C, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-519
  • Mfr. Part No. 5SY6318-7
Each
$297.63(exc. GST)
Being discontinued
RS PRO 30A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8107
Each (In a Pack of 50)
$0.662(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA1 Molded Case Circuit Breakers
  • RS Stock No. 629-258
  • Mfr. Part No. 8GK4731-3KK12
Each
$338.17(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller Series NZM Terminal Element for use with N(S)1, NZM1, PN1
  • RS Stock No. 254-936
  • Mfr. Part No. 260019 NZM1-XKS
Each
$74.55(exc. GST)
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