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

231 of 999+
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 12.5A Current Rating
  • RS Stock No. 175-1534
  • Mfr. Part No. GV4PE12N
Each
$1,017.84(exc. GST)
Siemens SENTRON 5SY7 MCB, 2P, 13A Curve D, 230V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 610-549
  • Mfr. Part No. 5SY7513-8
Each
$196.35(exc. GST)
Phoenix Contact 1 Phase Surge Arrester, 25kA, 350V ac, DIN Rail Mount
  • RS Stock No. 518-327
  • Mfr. Part No. 2905414
Each
$612.38(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 3 channels
  • RS Stock No. 155-787
  • Mfr. Part No. 3VA2325-7KP32-0AA0
Each
$7,226.43(exc. GST)
Mersen 20A NH Fuse, NH000, 500V ac
  • RS Stock No. 270-3100
  • Mfr. Part No. Q232498
Each
$24.18(exc. GST)
Schneider Electric, ComPacT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 260-9435
  • Mfr. Part No. C10F3TM080
Each
$1,515.36(exc. GST)
Mersen 12A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0592
  • Mfr. Part No. J1017183 / FR14GR69V12T
Each
$40.84(exc. GST)
Schneider Electric 440V (Volts) Circuit Trip Circuit Trip for use with NSX630/400
  • RS Stock No. 429-415
  • Mfr. Part No. C4044B400
Each
$11,434.16(exc. GST)
Schneider Electric, Powerpact Circuit breaker 4P 45A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 444-304
  • Mfr. Part No. BJL46045LU
Each
$3,443.19(exc. GST)
Schneider Electric, Powerpact Circuit breaker 1P 25A, Breaking Capacity 25 kA, Clip-On
  • RS Stock No. 444-301
  • Mfr. Part No. BJL16025
Each
$1,497.46(exc. GST)
Eaton 50A Tag Fuse, 21 x 79mm, 690V
  • RS Stock No. 229-041
  • Mfr. Part No. 50NHG000B-690 NH FUSE 50A 690V SIZE 000 GG MGL
1 Pack of 3
$34.17(exc. GST)
Eaton 4A 45 x 80 x 54mm Neozed Fuse, 400V ac
  • RS Stock No. 253-886
  • Mfr. Part No. 268985 Z-SLS/B-4A
Each
$138.49(exc. GST)
Schneider Electric Resi9 MCB, 3P, 16A Curve B, 400V AC, 6000 A Breaking Capacity
  • RS Stock No. 654-661
  • Mfr. Part No. R9F23316
Each
$163.30(exc. GST)
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-360
  • Mfr. Part No. 8GK4736-2KK22
Each
$440.46(exc. GST)
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 221-5615
  • Mfr. Part No. 3-128-221
1 Box of 10
$302.42(exc. GST)
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-147
  • Mfr. Part No. 3VA6610-7JP32-0AA0
Each
$18,769.31(exc. GST)
Eaton 150mA Nickel Plated Spring Brass (Terminal) Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 228-690
  • Mfr. Part No. FNQ-15/100
1 Pack of 10
$1,315.73(exc. GST)
Mersen 30A Slow-Blow Ceramic Cartridge Fuse, 13 x 29mm
  • RS Stock No. 209-6416
  • Mfr. Part No. T1065699 / BLD24V30
Each (In a Pack of 10)
$6.739(exc. GST)
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSI, 4 channels
  • RS Stock No. 259-4643
  • Mfr. Part No. 1SDA072915R1
Each
$16,317.58(exc. GST)
Eaton Surface Mount Fuse 50A, 60 V dc, 250V ac
  • RS Stock No. 171-6803
  • Mfr. Part No. 1025HC50-R
Each (In a Pack of 5)
$6.878(exc. GST)
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