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

207 of 999+
Mersen 125A size 30 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-1975
  • Mfr. Part No. V300053
Each
$219.67(exc. GST)
Siemens SENTRON Busbar
  • RS Stock No. 266-505
  • Mfr. Part No. 8US1313-4AM04
Each
$723.48(exc. GST)
Schneider Electric, ComPacT New Generation MCCB 4P 20A, Breaking Capacity 65 kA, Screw Mount
  • RS Stock No. 207-190
  • Mfr. Part No. BGL46020LU
Each
$7,668.36(exc. GST)
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4473
  • Mfr. Part No. 1SDA072681R1
Each
$7,461.32(exc. GST)
Bourns 1.25A Resettable Fuse, 33V
  • RS Stock No. 245-9135
  • Mfr. Part No. MF-LSMF125/33X-2
Each (On a Tape of 10)
$1.119(exc. GST)
Littelfuse SMD Non Resettable Fuse 750mA, 125V
  • RS Stock No. 738-2835
  • Mfr. Part No. 0452.750MRL
Each (In a Pack of 10)
$2.897(exc. GST)
Schurter Thermal Circuit Breaker - T9 Single Pole 48 V dc, 240V ac Voltage Rating, 4A Current Rating
  • RS Stock No. 830-4284P
  • Mfr. Part No. 4404.0097
Each (Supplied in a Bag)
$6.28(exc. GST)
Eaton 250A NH Fuse, 63 x 40 x 135mm, 400V ac
  • RS Stock No. 254-760
  • Mfr. Part No. 250NHG1B-400
1 Pack of 3
$62.38(exc. GST)
Lovato 32A Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 248-5509
  • Mfr. Part No. FB01B1PL
Each
$34.73(exc. GST)
ABB 6A Tag Fuse, 690V
  • RS Stock No. 250-4383
  • Mfr. Part No. 1SCA022661R8410
1 Box of 3
$60.92(exc. GST)
Eaton 3.15A Cartridge Fuse, 359 x 25.4mm
  • RS Stock No. 254-745
  • Mfr. Part No. 24ABGN223.15
Each
$533.64(exc. GST)
Phoenix Contact 1 Phase Surge Arrester, DIN Rail Mount
  • RS Stock No. 129-560
  • Mfr. Part No. 2800103
Each
$318.46(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels
  • RS Stock No. 157-140
  • Mfr. Part No. 3VA2225-0KP42-0AA0
Each
$9,479.26(exc. GST)
Siemens Push Button Circuit Trip for use with Green Blue Lamps
  • RS Stock No. 216-4795
  • Mfr. Part No. 5TE4804
Each
$179.20(exc. GST)
Siemens 1.6A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 271-3209
  • Mfr. Part No. 8WA1822-7EF78
Each (In a Pack of 10)
$6.214(exc. GST)
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V Voltage Rating DIN Rail Mount, 18A Current
  • RS Stock No. 272-892
  • Mfr. Part No. GV3P18
Each
$926.02(exc. GST)
Schneider Electric, NSX MCCB 3P 630A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 219-8377
  • Mfr. Part No. LV432814
Each
$8,671.87(exc. GST)
Eaton 6A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 263-180
  • Mfr. Part No. 6NHG000BI-400
1 Pack of 3
$32.21(exc. GST)
Schneider Electric MasterPact Connection Unit for use with MTZ1 06-16
  • RS Stock No. 212-000
  • Mfr. Part No. LV833728
Each
$683.09(exc. GST)
Eaton 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690V ac
  • RS Stock No. 765-2948
  • Mfr. Part No. CHM2DIU
Each
$237.99(exc. GST)
1
207
1758
Results per page

Related links