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

229 of 999+
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA2, 4 channels
  • RS Stock No. 156-614
  • Mfr. Part No. 3VA2463-6KQ42-0AA0
Each
$12,494.31(exc. GST)
ABB 35A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 250-4392
  • Mfr. Part No. 1SCA022697R2510
1 Box of 3
$56.19(exc. GST)
ABB 40A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 250-4360
  • Mfr. Part No. 1SCA022652R1170
1 Box of 3
$63.79(exc. GST)
Eaton 80A Cartridge Fuse, 76 x 403mm
  • RS Stock No. 228-614
  • Mfr. Part No. 7.2WFNHO80 7.2KV 80A 3" MOTOR START FUSE
1 Pack of 3
$3,722.54(exc. GST)
Socomec 250A NH Fuse, NH2, 500V
  • RS Stock No. 252-5344
  • Mfr. Part No. 67220250
Each (In a Pack of 3)
$62.27(exc. GST)
Eaton PC Board Non Resettable Fuse, Radial 5A, 250V ac
  • RS Stock No. 169-9502
  • Mfr. Part No. SR-5-5A-BK
Each (In a Bag of 200)
$2.466(exc. GST)
Bourns Thermal Fuse 50 A, 12V
  • RS Stock No. 258-6384
  • Mfr. Part No. P-TCO-N450/12-2
Each (In a Pack of 10)
$1.141(exc. GST)
Eaton 800A Centred Tag Fuse, NH3, 440V ac
  • RS Stock No. 182-1729
  • Mfr. Part No. 800NHG3B
Each
$151.84(exc. GST)
Schneider Electric Transferpac for use with Circuit Breaker
  • RS Stock No. 230-6609
  • Mfr. Part No. 29352
Each
$1,293.60(exc. GST)
Eaton PC Board Non Resettable Fuse, Radial 1.6A, 250V ac
  • RS Stock No. 769-3371
  • Mfr. Part No. SS-5F-1-6A-BK
Each (In a Pack of 5)
$2.41(exc. GST)
ABB MCCB 3P 160A, Breaking Capacity 25 kA
  • RS Stock No. 192-0818
  • Mfr. Part No. 1SDA067399R1
Each
$1,000.42(exc. GST)
Eaton Plate for use with N4-4, NZM4-4
  • RS Stock No. 253-647
  • Mfr. Part No. 266815 NZM4-4-XKM1
Each
$225.91(exc. GST)
Eaton 250A Centred Tag Fuse, NH03, 500V ac
  • RS Stock No. 182-1528
  • Mfr. Part No. 250NHG03B
Each (In a Box of 3)
$71.28(exc. GST)
Mersen 4A Slow-Blow Ceramic Cartridge Fuse, 8.5 x 31.5mm
  • RS Stock No. 247-2945
  • Mfr. Part No. X222959
1 Box of 10
$46.06(exc. GST)
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-794
  • Mfr. Part No. A9DF3620
Each
$759.51(exc. GST)
Bourns Single, Three Phase Surge Protector, 50kA, 1.8kV, DIN Rail Mount
  • RS Stock No. 287-9637
  • Mfr. Part No. 1250A-3S-480
Each (In a Box of 48)
$502.32(exc. GST)
Schneider Electric MCCB 4P 16 → 160A, Cable Mount
  • RS Stock No. 178-7903
  • Mfr. Part No. LV426971
Each
$219.45(exc. GST)
Eaton 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 765-2932
  • Mfr. Part No. CHM1DIU
Each
$130.89(exc. GST)
Eaton 110A Centred Tag Fuse, 38.1 x 146.05mm, 600V
  • RS Stock No. 182-1343
  • Mfr. Part No. LPJ-110SP
Each
$842.77(exc. GST)
Acti9 Busbar, 440V ac, 18mm Pitch
  • RS Stock No. 585-482
  • Mfr. Part No. A9XPF521
1 Pack of 5
$539.39(exc. GST)
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