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

253 of 999+
In Stock
Schneider Electric, ComPacT NSX Circuit breaker 1P 30A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-227
  • Mfr. Part No. IL0301P253
Each
$387.15(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3755
  • Mfr. Part No. 3VA2040-6JQ46-0AA0
Each
$5,049.43(exc. GST)
In Stock
RS PRO RC Suppressor Circuit for use with Contactors
  • RS Stock No. 277-8528
Each
$104.19(exc. GST)
In Stock
TE Connectivity for use with Circuit Breaker
  • RS Stock No. 782-7824
  • Mfr. Part No. 1-1423696-6
Each (In a Pack of 5)
$7.546(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4106
  • Mfr. Part No. 1SDA072213R1
Each
$9,871.87(exc. GST)
Temporarily out of stock
Siemens 50A DIIImm Bottle Fuse, M18 Thread Size, gG, 690V
  • RS Stock No. 626-971
  • Mfr. Part No. 5SD8050
1 Pack of 5
$211.43(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 50A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 214-770
  • Mfr. Part No. C11B44V050L
Each
$4,157.81(exc. GST)
In Stock
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 600mA Current Rating
  • RS Stock No. 284-6038
  • Mfr. Part No. 4410.0039
Each
$50.69(exc. GST)
Being discontinued
RS PRO 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6045
Each (In a Pack of 10)
$1.987(exc. GST)
In Stock
Schneider Electric R9PR RCCB, 63A, 4 Pole, 30mA, Type AC, 400V
  • RS Stock No. 276-8976
  • Mfr. Part No. R9PRC463
Each
$802.70(exc. GST)
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 202-501
  • Mfr. Part No. 1STQ007409A0000
Each
$2,299.80(exc. GST)
In Stock
RS PRO 2.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6073
Each (In a Pack of 10)
$1.232(exc. GST)
Temporarily out of stock
Hager Hager HMX Circuit Breaker, 3P, 50A Curve C, 415V AC, 50 kA Breaking Capacity
  • RS Stock No. 599-873
  • Mfr. Part No. HMX350
Each
$1,355.10(exc. GST)
In Stock
Mersen 350A size 31 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2079
  • Mfr. Part No. M300046
Each
$364.39(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 260-470
  • Mfr. Part No. 3VA6340-8KQ41-0AA0
Each
$13,634.09(exc. GST)
Temporarily out of stock
Lovato SM Undervoltage Release for use with SM2, SM3 Series Circuit Breakers
  • RS Stock No. 248-5679
  • Mfr. Part No. SM2X14400
Each
$99.69(exc. GST)
Temporarily out of stock
Eaton 160A Tag Fuse, 76 x 442mm, 7.2kV
  • RS Stock No. 228-836
  • Mfr. Part No. 7.2WFMSJ160
Each
$1,834.20(exc. GST)
In Stock
Littelfuse 1.5A Resettable Fuse, 6V dc
  • RS Stock No. 624-3130P
  • Mfr. Part No. NANOSMDC150F-2
Each (Supplied on a Reel)
$0.628(exc. GST)
In Stock
Legrand 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 266-3103
  • Mfr. Part No. 0 134 06
1 Box of 10
$127.57(exc. GST)
Temporarily out of stock
Siemens 2A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-089
  • Mfr. Part No. 3NC1202-0MK
1 Pack of 20
$446.29(exc. GST)
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