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

203 of 999+
In Stock
Eaton, xEnergy MCCB 3P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 454-8089
  • Mfr. Part No. 259080 NZMB1-A125
Each
$643.94(exc. GST)
Currently unavailable
Schurter SMD Non Resettable Fuse 2.5A, 32 V ac, 63V dc
  • RS Stock No. 665-7365P
  • Mfr. Part No. 3413.0120.22.
Each (Supplied on a Reel)
$1.017(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 3P, 40A Curve D, 400V AC
  • RS Stock No. 239-9973
  • Mfr. Part No. A9P34340
Each
$424.00(exc. GST)
Temporarily out of stock
ABB 3 Phase Distribution Board, 12 Way, 250 A
  • RS Stock No. 539-1581
  • Mfr. Part No. 1SKP812142C0059 EPB25-312 CUK
Each
$1,174.90(exc. GST)
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 400mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-097
  • Mfr. Part No. 3RV2311-0EC10
Each
$395.63(exc. GST)
In Stock
Eaton Eaton Moeller Door Coupling Handle for use with MCC
  • RS Stock No. 272-0586
  • Mfr. Part No. 164298 PKZ0-XRHT-MCC
Each
$175.20(exc. GST)
In Stock
Socomec 160A Rail Mount Fuse Holder for 00 Fuse, 1P, 690V
  • RS Stock No. 233-3343
  • Mfr. Part No. 65001110
Each (In a Pack of 3)
$38.29(exc. GST)
In Stock
ABB 250V ac Push Button Push Button
  • RS Stock No. 701-8538
  • Mfr. Part No. 2CCA703162R0001 E217-16-10D
Each
$48.37(exc. GST)
In Stock
Better World
Schneider Electric 250V ac Push Button Push Button
  • RS Stock No. 790-9178
  • Mfr. Part No. A9E18037
Each
$148.31(exc. GST)
In Stock
Siemens 40A Tag Fuse, NH0, 500V ac
  • RS Stock No. 143-896
  • Mfr. Part No. 3NA3017
1 Pack of 3
$79.48(exc. GST)
Temporarily out of stock
SENTRON Shunt Trip Voltage Release for use with 3VA4/5/6 Series
  • RS Stock No. 263-865
  • Mfr. Part No. 3VA9978-0BL30
Each
$935.62(exc. GST)
In Stock
WAGO Electronic Circuit Breaker 500mA 24V 787, 1 channels , DIN Rail
  • RS Stock No. 303-345
  • Mfr. Part No. 787-3861/050-1000
Each
$91.80(exc. GST)
In Stock
Better World
ABB, Protecta MCCB 3P 250A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 831-9181
  • Mfr. Part No. 1SDA068208R1 XT1D 160 3p F F
Each
$825.84(exc. GST)
Temporarily out of stock
Better World
ABB Emax 2 MCB, 3P, 800A, 690V AC, 66 kA Breaking Capacity
  • RS Stock No. 225-5871
  • Mfr. Part No. 1SDA070765R1 E1.2N 800 Ekip Touch LSI 3
Each
$12,273.87(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 100mA, 250V ac
  • RS Stock No. 895-1653
  • Mfr. Part No. 37201000411
Each (In a Pack of 10)
$1.772(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 100mA, 250V ac
  • RS Stock No. 226-0557
  • Mfr. Part No. 3720100000
Each (In a Pack of 10)
$3.05(exc. GST)
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0254
  • Mfr. Part No. 8GK1031-4KK10
Each
$913.56(exc. GST)
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA1 250
  • RS Stock No. 269-7118
  • Mfr. Part No. 3VA9213-0JC13
Each (In a Pack of 3)
$359.593(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 70 kA
  • RS Stock No. 209-7029
  • Mfr. Part No. 3VA1220-6EF32-0AA0
Each
$1,823.26(exc. GST)
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V
  • RS Stock No. 136-9690
  • Mfr. Part No. 3RV2935-5A
Each
$145.04(exc. GST)
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