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

272 of 999+
Temporarily out of stock
Siemens 20A Fuse Holder for 8 x 32mm Fuse, 3P, 400V
  • RS Stock No. 299-918
  • Mfr. Part No. 3NW7334
Each
$87.29(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 874-4391
  • Mfr. Part No. 3VA2140-5HL32-0AA0
Each
$1,067.62(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Undervoltage Release for use with N(S)2(-4), N(S)3(-4), NZM2(-4), NZM3(-4)
  • RS Stock No. 248-970
  • Mfr. Part No. 189750 NZM2/3-XU24AC-PI
Each
$373.78(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller Series IZMX/INX Locking Device for use with INX40…, IZMX40…
  • RS Stock No. 239-877
  • Mfr. Part No. 184230 IZMX-PLPC40-M-OFF-1
Each
$322.08(exc. GST)
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 90A , 4 channels , Fixed
  • RS Stock No. 121-910
  • Mfr. Part No. 153383 NZMB2-4-AF90-BT-NA
Each
$2,592.17(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 269-882
  • Mfr. Part No. 3VA6110-5KL31-0AA0
Each
$3,812.16(exc. GST)
Temporarily out of stock
Siemens Base Mount Fuse Holder, 3P, 690V
  • RS Stock No. 157-441
  • Mfr. Part No. 5SF6215
1 Pack of 2
$121.72(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4367
  • Mfr. Part No. 3VA1196-4EF36-0AA0
Each
$951.18(exc. GST)
In Stock
Mersen 160A NH Fuse, NH00, 500V ac
  • RS Stock No. 375-9632
  • Mfr. Part No. P211084
Each (In a Pack of 3)
$27.573(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS1600
  • RS Stock No. 341-524
  • Mfr. Part No. C6PFM
Each
$17,184.52(exc. GST)
Temporarily out of stock
Eaton xEnergy Safety Ci Distribution Board Enclosure, 1 Way, 630 A
  • RS Stock No. 251-880
  • Mfr. Part No. 194574 CI44-S60-630/3-1XNH00
Each
$1,229.10(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 300A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 256-510
  • Mfr. Part No. 3VA5330-5EF41-2AA0
Each
$8,222.94(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 256-527
  • Mfr. Part No. 3VA5320-5GF41-0AA0
Each
$6,678.08(exc. GST)
In Stock
Siemens 4A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 396-168
  • Mfr. Part No. 5SB221
Each (In a Pack of 5)
$2.284(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with Moduler Installtion Devices
  • RS Stock No. 629-234
  • Mfr. Part No. 8GK4301-3KK11
Each
$219.19(exc. GST)
In Stock
Schneider Electric Auxiliary Contact for use with ComPact
  • RS Stock No. 276-8778
  • Mfr. Part No. LV429273
Each
$157.26(exc. GST)
In Stock
Schneider Electric Linergy Busbar
  • RS Stock No. 130-537
  • Mfr. Part No. LVS04536
Each
$2,139.17(exc. GST)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-617
  • Mfr. Part No. 3VA9673-0JJ44
1 Kit
$1,549.90(exc. GST)
Temporarily out of stock
ABB High Performance S800N MCB, 1P, 80A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-342
  • Mfr. Part No. 2CCG001226R0001
Each
$116.02(exc. GST)
In Stock
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7739
  • Mfr. Part No. C16B3TM100
Each
$1,852.97(exc. GST)
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