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

165 of 999+
Temporarily out of stock
Eaton 300A Centred Tag Fuse, 50.80 x 85.85mm, 600V ac
  • RS Stock No. 182-1363
  • Mfr. Part No. JKS-300
Each
$1,896.19(exc. GST)
Temporarily out of stock
Hager CFH RCCB, 40A, 3P+N Pole, 300mA, Type A-HI, 230 → 400V ac
  • RS Stock No. 597-934
  • Mfr. Part No. CFH840F
Each
$748.53(exc. GST)
In Stock
Bourns 0.5A Resettable Fuse, 72V
  • RS Stock No. 691-7569P
  • Mfr. Part No. MF-RX050/72-0
Each (Supplied in a Bag)
$0.68(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, On Base Element Mount
  • RS Stock No. 201-6289
  • Mfr. Part No. 2907840
Each
$270.52(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-815
  • Mfr. Part No. 3VA2225-8JQ32-0AA0
Each
$7,113.84(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 400A, Fixed Mount
  • RS Stock No. 260-8128
  • Mfr. Part No. C40N4
Each
$6,657.27(exc. GST)
In Stock
Siemens 63A Bottle Fuse Holder, 3P, 400V ac
  • RS Stock No. 202-7075
  • Mfr. Part No. 5SG5653
Each (In a Pack of 2)
$56.655(exc. GST)
In Stock
Siemens 40A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2006
  • Mfr. Part No. 3NA7817
Each (In a Pack of 3)
$15.163(exc. GST)
Temporarily out of stock
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0943
  • Mfr. Part No. 3WA9111-0EK67
1 Set
$1,397.09(exc. GST)
Temporarily out of stock
ABB BF1602 Busbar
  • RS Stock No. 200-399
  • Mfr. Part No. 1STQ008222A0000
Each
$1,421.35(exc. GST)
In Stock
Hager NEN MCB, 2P, 10A Curve B, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4962
  • Mfr. Part No. NEN210
Each
$269.71(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 212-0269
  • Mfr. Part No. LV433257
Each
$2,262.19(exc. GST)
In Stock
Eaton 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1745
Each (In a Pack of 10)
$0.949(exc. GST)
In Stock
Schneider Electric C120 A9N Circuit Breaker, 2P, 10A, Type AC, 415V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 288-7117
  • Mfr. Part No. A9N18384
Each
$1,527.89(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Cable Connection Kit for use with Compact Nsx 100 To 630
  • RS Stock No. 221-1172
  • Mfr. Part No. LV429272
Each
$362.85(exc. GST)
In Stock
Littelfuse 3A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0102
  • Mfr. Part No. 0312003.HXP
Each (In a Pack of 10)
$1.96(exc. GST)
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 45A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-069
  • Mfr. Part No. 3RV2431-4VA10
Each
$1,011.27(exc. GST)
Temporarily out of stock
ABB AC Switch Disconnectors Accessories Detachable Neutral Clamp for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9706
  • Mfr. Part No. 1SCA104162R1001
Each
$555.17(exc. GST)
In Stock
Murrelektronik Limited Electronic Circuit Breaker
  • RS Stock No. 123-6693
  • Mfr. Part No. 9000-41042-0100600
Each
$391.22(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 300A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-428
  • Mfr. Part No. 3VA5330-6EF31-0AA0
Each
$8,441.61(exc. GST)
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