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

34912 Products showing for Fuses & Circuit Breakers

87 of 999+
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 50A, Fixed Mount
  • RS Stock No. 260-7543
  • Mfr. Part No. C11B4TM050L
Each
$1,366.18(exc. GST)
Temporarily out of stock
Clipsal Electrical MX9RC RCCB, 40A, 2 Pole, 30mA, Type A, 240V ac
  • RS Stock No. 282-2999
  • Mfr. Part No. MX9RC240
Each
$73.15(exc. GST)
Temporarily out of stock
C.BREAKER TMAX XT2 P Fp 3P Ef
  • RS Stock No. 192-0824
  • Mfr. Part No. 1SDA068187R1
Each
$555.76(exc. GST)
In Stock
Mersen 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 188-7369
  • Mfr. Part No. P218720
Each (In a Pack of 10)
$6.475(exc. GST)
Temporarily out of stock
Siemens 125A Tag Fuse, NH2, 400V ac
  • RS Stock No. 144-085
  • Mfr. Part No. 3NA6232-4
1 Pack of 3
$139.36(exc. GST)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 500mA, 125V ac
  • RS Stock No. 769-3725
  • Mfr. Part No. 0452.500NRL
Each (In a Pack of 10)
$2.728(exc. GST)
Temporarily out of stock
ABB 80A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 250-4437
  • Mfr. Part No. 1SCA022697R8540
1 Box of 3
$188.34(exc. GST)
In Stock
Hager NEN MCB, 4P, 50A Curve B, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4704
  • Mfr. Part No. NEN450
Each
$983.03(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 3P 125A, Breaking Capacity 18 kA, Screw Mount
  • RS Stock No. 578-268
  • Mfr. Part No. BGL36125LU
Each
$1,395.44(exc. GST)
Temporarily out of stock
Socomec 1kA Tag Fuse, NH3, 690V, 150mm
  • RS Stock No. 252-5308
  • Mfr. Part No. 170M6814
Each
$421.77(exc. GST)
Temporarily out of stock
Schneider Electric PowerPact Circuit Breaker - PowerPacT Single Pole 347V ac Voltage Rating Clip-On, 25A Current Rating
  • RS Stock No. 205-365
  • Mfr. Part No. BGF16025
Each
$1,260.83(exc. GST)
Temporarily out of stock
Schneider Electric 3 Phase Surge Arrester, 75kA, 2000V (Volts), Clip-On Mount
  • RS Stock No. 438-864
  • Mfr. Part No. M9L33480
Each
$2,658.65(exc. GST)
Temporarily out of stock
Hager BDF Series RCCB, 40A, 4 Pole, 30mA, Type F
  • RS Stock No. 597-899
  • Mfr. Part No. BDF840
Each
$990.07(exc. GST)
Temporarily out of stock
Eaton 20A Ceramic Cartridge Fuse, 13 x 29mm
  • RS Stock No. 181-8488
  • Mfr. Part No. SMD20
1 Box of 20
$173.97(exc. GST)
Temporarily out of stock
Eaton 5A T Melamine Cartridge Fuse, 0.41 x 1.5in
  • RS Stock No. 261-726
  • Mfr. Part No. FNQ-R-5
1 Pack of 10
$1,146.33(exc. GST)
Temporarily out of stock
160A Fuse Holder for 135 x 470mm Fuse, 3P, 690V
  • RS Stock No. 263-158
  • Mfr. Part No. EBF00230S8
Each
$217.32(exc. GST)
Temporarily out of stock
Siemens 25A NH Fuse, NH1, 440 - 500V ac/dc
  • RS Stock No. 269-8307
  • Mfr. Part No. 3NA3110
Each (In a Pack of 3)
$28.06(exc. GST)
Last RS stock
Wickmann 30A Inline Fuse Holder, 32V dc
  • RS Stock No. 174-0625
  • Mfr. Part No. 868-062-000
Each (In a Pack of 5)
$3.182(exc. GST)
Temporarily out of stock
Hager RCBO, 25A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-207
  • Mfr. Part No. ADM475C
Each
$1,092.65(exc. GST)
Temporarily out of stock
Schneider Electric Surge Arrester, 8kA, 460V ac, Clip-On Mount
  • RS Stock No. 429-213
  • Mfr. Part No. A9L08421
Each
$1,634.13(exc. GST)
Results per page
1
87
1746

Related links