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

60 of 999+
Better World
ABB System Pro M Compact S200 MCB, 3P, 50A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7618
  • Mfr. Part No. 2CDS253001R0505 S203-B50
Each
$154.64(exc. VAT)
Littelfuse 0.4A Resettable Fuse, 72V
  • RS Stock No. 517-6629
  • Mfr. Part No. RXEF040
Each (In a Pack of 10)
$0.612(exc. VAT)
Eaton Fuse Holder Cable Clamp
  • RS Stock No. 242-890
  • Mfr. Part No. 183008 XNH2-XPRC
1 Pack of 3
$244.84(exc. VAT)
ETA Thermal Circuit Breaker - 3120-F 2 Pole 240V Voltage Rating Snap In, 12A Current Rating
  • RS Stock No. 729-2792
  • Mfr. Part No. 3120-F554-P7T1-W19DG4-12A
Each
$65.77(exc. VAT)
Better World
Schneider Electric Acti 9 1 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2755
  • Mfr. Part No. A9XAH157
Each
$207.86(exc. VAT)
RS PRO 200A Rail Mount Fuse Holder for B2 Fuse
  • RS Stock No. 216-5525
Each
$369.23(exc. VAT)
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8221
  • Mfr. Part No. C63N3
Each
$7,347.29(exc. VAT)
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 2P, 600V
  • RS Stock No. 299-078
  • Mfr. Part No. 1SNF100037R0000
Each
$16.08(exc. VAT)
Eaton 1A Cartridge Fuse
  • RS Stock No. 228-685
  • Mfr. Part No. FNQ-1
1 Pack of 10
$1,031.33(exc. VAT)
Phoenix Contact 1 Phase Surge Arrester, DIN Rail Mount
  • RS Stock No. 130-082
  • Mfr. Part No. 2801042
Each
$330.50(exc. VAT)
Socomec 80A NH Fuse, 0, 500V
  • RS Stock No. 252-5333
  • Mfr. Part No. 66000080
Each (In a Pack of 3)
$26.40(exc. VAT)
Limitor Thermal Fuse +125°C 2.5 A, 250V ac
  • RS Stock No. 176-9198
  • Mfr. Part No. P82 125 05100
Each
$13.23(exc. VAT)
Phoenix Contact Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 207-2731
  • Mfr. Part No. 2906798
Each
$221.71(exc. VAT)
Hager BP RCD, 63A, 2 Pole, 300mA, Type AC
  • RS Stock No. 144-4885
  • Mfr. Part No. BP264
Each
$954.20(exc. VAT)
Eaton 10A Slow-Blow Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-196
  • Mfr. Part No. C14M10 CYLINDRICAL FUSE 14 x 51 10A AM 690V AC
1 Pack of 10
$39.85(exc. VAT)
Siemens SENTRON 3 Phase Busbar, 18mm Pitch
  • RS Stock No. 124-3143
  • Mfr. Part No. 5ST3710
Each
$275.11(exc. VAT)
RS PRO 10 A Panel Mount Fuse Holder, 1P for 5 x 20 mm, 250 V
  • RS Stock No. 277-3908
Each (In a Bag of 1000)
$4.708(exc. VAT)
RS PRO 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 188-4479
1 Box of 2000
$13,556.00(exc. VAT)
Better World
Siemens Surge Protector, 400V ac, Clip-On Mount
  • RS Stock No. 122-9475
  • Mfr. Part No. 3RT2916-1BE00
Each
$40.96(exc. VAT)
Schneider Electric IKQ RCD, 25A, 2 Pole, 30mA, 230V ac
  • RS Stock No. 335-406
  • Mfr. Part No. SED25032
Each
$392.38(exc. VAT)
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