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

52 of 999+
RS PRO 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-699
Each (In a Pack of 10)
$2.669(exc. VAT)
Eaton 400mA T Nickel Plated Spring Brass (Terminal) Cartridge Fuse, 0.41 x 0.41in
  • RS Stock No. 228-608
  • Mfr. Part No. FNQ-4/10
1 Pack of 10
$1,291.68(exc. VAT)
ETA Busbar, 24V dc
  • RS Stock No. 631-9158
  • Mfr. Part No. Y307.016.01 BUSBAR
Each
$20.81(exc. VAT)
Better World
Schneider Electric Multi 9 M9F4 MCB, 1P, 5A, Type Z, 415V AC, 60V DC, 20 kA, 3 kA Breaking Capacity
  • RS Stock No. 211-2675
  • Mfr. Part No. M9F44105
Each
$319.52(exc. VAT)
Schneider Electric Surge Arrester, 40kA, 350V ac, Clip-On Mount
  • RS Stock No. 288-7108
  • Mfr. Part No. A9L40301
Each
$1,991.32(exc. VAT)
Bourns Thermal Fuse +72°C 60 A, 28V
  • RS Stock No. 258-6349
  • Mfr. Part No. AC72ABD
Each (In a Bag of 1000)
$1.697(exc. VAT)
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 6A Current Rating
  • RS Stock No. 344-5327
  • Mfr. Part No. 1658-G21-02-P10-6A
Each
$12.39(exc. VAT)
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 1A Current Rating
  • RS Stock No. 284-5798
  • Mfr. Part No. 4400.0008
Each
$29.17(exc. VAT)
Mersen 6A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 230-3547
  • Mfr. Part No. H222210
Each (In a Pack of 10)
$6.381(exc. VAT)
Eaton, NZM MCCB 3P 160A, Breaking Capacity 80 kA, Fixed Mount
  • RS Stock No. 628-8076
  • Mfr. Part No. 266005 PN2-160
1 Box of 1
$1,050.63(exc. VAT)
Europa 3 Phase Distribution Board, 36 Way, 125 A
  • RS Stock No. 849-6421
  • Mfr. Part No. TPN12
Each
$1,422.38(exc. VAT)
Socomec 32A Fuse Holder for 10 x 38mm Fuse, 1P, 1kV dc
  • RS Stock No. 252-3750
  • Mfr. Part No. 57PV0001
Each (In a Pack of 12)
$15.98(exc. VAT)
Eaton 63A Cartridge Fuses, 76 x 359mm
  • RS Stock No. 246-014
  • Mfr. Part No. 12BFGHA63
1 Pack of 3
$3,029.58(exc. VAT)
RS PRO 10A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 413-816
Each (In a Pack of 10)
$9.046(exc. VAT)
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 8A Current Rating
  • RS Stock No. 284-5861
  • Mfr. Part No. 4400.0015
Each
$24.20(exc. VAT)
Eaton 250A British Standard Fuse, B3, 415V ac, 111mm
  • RS Stock No. 139-984
  • Mfr. Part No. ED250
Each
$103.95(exc. VAT)
RS PRO 2.5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3499
Each (In a Pack of 10)
$0.529(exc. VAT)
Schneider Electric Acti 9 3 Phase Distribution Board, 30 Way, 250 A
  • RS Stock No. 230-6839
  • Mfr. Part No. SAU25030183
Each
$356.43(exc. VAT)
Better World
ABB Compact Home SH200 MCB, 1P, 20A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 539-8245
  • Mfr. Part No. 2CDS211001R0204 SH201-C20
Each
$37.64(exc. VAT)
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-733
  • Mfr. Part No. A9D73620
Each
$662.19(exc. VAT)
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