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

208 of 999+
Eaton 16A 36 x 11mm Diazed Fuse, 400V ac
  • RS Stock No. 258-699
  • Mfr. Part No. 288939 Z-D01/SE-16
1 Pack of 12
$9.28(exc. GST)
Siemens SENTRON Motor Operator for use with 3VA20/21/22
  • RS Stock No. 155-946
  • Mfr. Part No. 3VA9267-0HC30
Each
$4,246.66(exc. GST)
RS PRO 63A Solid Link for F2 Fuses
  • RS Stock No. 242-1134
Each (In a Pack of 5)
$10.132(exc. GST)
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4824
  • Mfr. Part No. 3VA2563-7HM32-0AA0
Each
$9,419.06(exc. GST)
RS PRO Earthing Strap Copper 457 x 13mm Diameter
  • RS Stock No. 264-9253
Each (In a Pack of 5)
$24.366(exc. GST)
Siemens 125A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 627-153
  • Mfr. Part No. 3NC2211-0MK
1 Pack of 10
$452.22(exc. GST)
Siemens 400V ac Undervoltage Release Circuit Trip for use with 3RV2 Series Circuit Breakers
  • RS Stock No. 706-1960
  • Mfr. Part No. 3RV2902-2AV0
Each
$160.57(exc. GST)
Better World
ABB System Pro M Compact S200 MCB, 3P, 50A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9661
  • Mfr. Part No. 2CDS253001R0501 S203-D50
Each
$166.34(exc. GST)
Siemens SENTRON 2 Phase Busbar, 27mm Pitch
  • RS Stock No. 187-5165
  • Mfr. Part No. 5ST3611
Each
$22.39(exc. GST)
Schurter CBE Thermal Circuit Breaker - TA45 2 Pole 240V ac Voltage Rating Snap-In, 20A Current Rating
  • RS Stock No. 269-3825
  • Mfr. Part No. 4430.3652
Each
$148.60(exc. GST)
Wickmann SMD Non Resettable Fuse 5A, 125V
  • RS Stock No. 174-0660
  • Mfr. Part No. 0448005.MR
Each (In a Pack of 5)
$2.368(exc. GST)
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0824
  • Mfr. Part No. 3WA9111-0AV25
Each
$924.17(exc. GST)
Eaton 50A Centred Tag Fuse, NH000, 690V ac
  • RS Stock No. 182-1434
  • Mfr. Part No. 170M1564D
Each (In a Box of 10)
$337.472(exc. GST)
Siemens SENTRON Cover for use with 8WA
  • RS Stock No. 237-7978
  • Mfr. Part No. 8WA1860
Each (In a Pack of 50)
$1.195(exc. GST)
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100/160
  • RS Stock No. 260-9358
  • Mfr. Part No. C103TM032
Each
$676.64(exc. GST)
Hager 6A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 250-8619
  • Mfr. Part No. LF406G
Each (In a Pack of 10)
$10.318(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - CPP Single Pole Panel Mount, 5A Current Rating
  • RS Stock No. 275-0187
  • Mfr. Part No. CPP11-52-5.00A-OC-V
1 Box of 10
$351.23(exc. GST)
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 80A Current Rating
  • RS Stock No. 175-1449
  • Mfr. Part No. GV4L80S
Each
$1,554.72(exc. GST)
Schneider Electric Flexible Elbow Busbar Trunking, 250 → 750mm, 400A, Canalis Series
  • RS Stock No. 346-718
  • Mfr. Part No. KSA400DLF4CFM
Each
$10,704.66(exc. GST)
Hager NGN MCB, 4P, 2A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4770
  • Mfr. Part No. NGN402
Each
$727.64(exc. GST)
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