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

300 of 999+
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 1P, 300mA Curve D, 400V AC, 50 kA Breaking Capacity
  • RS Stock No. 610-644
  • Mfr. Part No. 5SY7114-8
Each
$110.97(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1.25kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-142
  • Mfr. Part No. C125N350FM
Each
$12,739.56(exc. GST)
Temporarily out of stock
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 4A Current Rating
  • RS Stock No. 201-5737
  • Mfr. Part No. 2800894
Each
$192.27(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA1 Molded Case Circuit Breakers
  • RS Stock No. 629-295
  • Mfr. Part No. 8GK4733-4KK22
Each
$503.09(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9828
  • Mfr. Part No. 3VA1120-5ED36-0AA0
Each
$974.28(exc. GST)
Temporarily out of stock
Siemens 110 → 480V (Volts) Shunt Release Circuit Trip for use with Miniature Circuit Breaker
  • RS Stock No. 328-520
  • Mfr. Part No. 5ST3030-0HG
Each
$156.90(exc. GST)
In Stock
SIBA 250mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3270
  • Mfr. Part No. 70-007-65/0.25A
Each (In a Pack of 10)
$0.17(exc. GST)
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 8A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2796
  • Mfr. Part No. 2908262
Each
$131.16(exc. GST)
In Stock
Mersen 50A NH Fuse, NH000, 400V ac
  • RS Stock No. 270-3067
  • Mfr. Part No. K223684
Each (In a Box of 3)
$21.023(exc. GST)
Temporarily out of stock
2A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 262-577
  • Mfr. Part No. SMD2
1 Pack of 20
$499.15(exc. GST)
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - TCP Single Pole 32V dc Voltage Rating On Base Element, 25A Current Rating
  • RS Stock No. 556-668
  • Mfr. Part No. 1499945
1 Pack of 100
$1,517.86(exc. GST)
Last RS stock
Wickmann 4A Resettable Fuse, 30 V ac, 30V dc
  • RS Stock No. 174-0845
  • Mfr. Part No. RF2561-000
Each (In a Pack of 10)
$1.129(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 4 channels
  • RS Stock No. 156-616
  • Mfr. Part No. 3VA2440-8HK42-0AA0
Each
$10,355.62(exc. GST)
In Stock
Eaton 100A Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8651
  • Mfr. Part No. 100NHG000B
Each
$21.33(exc. GST)
In Stock
Littelfuse 125A Grey, White CF Car Fuse, 58V dc
  • RS Stock No. 337-7943
  • Mfr. Part No. 155.0892.6121
Each
$22.03(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-4862
  • Mfr. Part No. 3VA1110-5EE46-0AA0
Each
$1,468.08(exc. GST)
Temporarily out of stock
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)
Temporarily out of stock
Siemens SIRIUS Undervoltage Release for use with Motor Circuit Breaker
  • RS Stock No. 157-849
  • Mfr. Part No. 3RV2922-1CV0
Each
$214.52(exc. GST)
In Stock
Eaton 8A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-106
  • Mfr. Part No. C10M8 CYLINDRICAL FUSE 10 x 38 8A AM 500V AC
1 Pack of 10
$24.71(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-7619
  • Mfr. Part No. C11H3TM040B
Each
$1,679.84(exc. GST)
1
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