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

241 of 999+
In Stock
Eaton HTC Series Thermoplastic Fuse Cover for 5 x 20mm Fuse
  • RS Stock No. 765-2976
  • Mfr. Part No. HTC-140M
Each (In a Pack of 5)
$4.09(exc. GST)
Last RS stock
Mersen 100mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3034
  • Mfr. Part No. F090533
Each (In a Box of 10)
$1.416(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9672
  • Mfr. Part No. 3VA11105FE420AA0
Each
$1,456.21(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-162
  • Mfr. Part No. 3VA6580-7HL42-0AA0
Each
$16,257.77(exc. GST)
Temporarily out of stock
80A NH Fuse, NH02, 500V
  • RS Stock No. 262-112
  • Mfr. Part No. 80NHM00B NH FUSE 80A 500V SIZE 00 AM
1 Pack of 3
$72.52(exc. GST)
In Stock
Mersen 1.25A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-828
  • Mfr. Part No. M090516Q
1 Box of 10
$12.90(exc. GST)
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 20A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7621
  • Mfr. Part No. 2CDS254001R0205 S204-B20
Each
$366.62(exc. GST)
Temporarily out of stock
Eaton 1.25kA Fuse Holder for 295 x 121.7 x 90mm Fuse, 1P, 690V ac
  • RS Stock No. 261-377
  • Mfr. Part No. SD4-S NH4 SINGLE POLE 1250A
Each
$240.15(exc. GST)
Temporarily out of stock
Eaton 30A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 480V
  • RS Stock No. 225-8219
  • Mfr. Part No. BK-HVP-L-R
1 Bag of 100
$1,432.70(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 45A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-659
  • Mfr. Part No. 3VA5145-6ED31-1AA0
Each
$1,688.94(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 270-003
  • Mfr. Part No. 3VA6115-7HL41-2AA0
Each
$5,045.55(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 3 channels
  • RS Stock No. 156-755
  • Mfr. Part No. 3VA2450-7MN32-0AA0
Each
$8,959.87(exc. GST)
Temporarily out of stock
30A Cartridge Fuse, 57 x 22.2mm
  • RS Stock No. 262-972
  • Mfr. Part No. 30KR85
1 Pack of 20
$448.05(exc. GST)
In Stock
Eaton 30A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 480V
  • RS Stock No. 225-8224
  • Mfr. Part No. BK-HVP-OO-R
1 Bag of 100
$2,362.75(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels
  • RS Stock No. 157-352
  • Mfr. Part No. 3VA2225-6KQ42-0AA0
Each
$8,364.06(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 1A, 250V
  • RS Stock No. 787-4322
  • Mfr. Part No. 0464001.DR
Each (In a Pack of 5)
$1.808(exc. GST)
In Stock
Siemens 80A NH Fuse, NH00, 500V ac
  • RS Stock No. 397-420
  • Mfr. Part No. 3NA6824-7
Each (In a Pack of 3)
$23.363(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 2.5A, 125V
  • RS Stock No. 738-2863
  • Mfr. Part No. 015402.5DR
Each (In a Pack of 10)
$4.101(exc. GST)
In Stock
Siemens SENTRON 2 Phase Busbar
  • RS Stock No. 187-5197
  • Mfr. Part No. 5ST3735
Each
$577.04(exc. GST)
Limited stock
Littelfuse 80mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4151
  • Mfr. Part No. 0218.080MXP
Each (In a Pack of 10)
$4.341(exc. GST)
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