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

255 of 999+
In Stock
Omron Busbar
  • RS Stock No. 111-3544
  • Mfr. Part No. PYDN-15.5-080S
Each
$26.19(exc. GST)
Temporarily out of stock
RS PRO 20A Blade Fuse Block, 250V
  • RS Stock No. 188-4477
1 Box of 1000
$1,929.66(exc. GST)
Temporarily out of stock
Eaton 100mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9413
  • Mfr. Part No. S500-100-R
1 Bag of 1000
$11,244.20(exc. GST)
Unavailable
Schneider Electric ComPact Trip Unit for use with Compact NSX 100/160/250 circuit breakers
  • RS Stock No. 221-0927
  • Mfr. Part No. LV429111
Each
$3,661.37(exc. GST)
Temporarily out of stock
Eaton BP-DS-600 Door for use with Service Distribution Board IVS
  • RS Stock No. 259-548
  • Mfr. Part No. 286720 BP-DS-600/10
Each
$130.46(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-084
  • Mfr. Part No. 3VA6115-8HL31-2AA0
Each
$4,484.90(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-633
  • Mfr. Part No. 3VA6560-7KT46-0AA0
Each
$17,311.70(exc. GST)
In Stock
Bulgin 13A Base Mount Fuse Holder for 6.3 x 25mm Fuse, 250V ac
  • RS Stock No. 213-7570
  • Mfr. Part No. FX0331
Each (In a Pack of 5)
$10.67(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-297
  • Mfr. Part No. 8GK4735-2KK22
Each
$350.70(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Undervoltage Release for use with N(S)4(-4), NZM4(-4)
  • RS Stock No. 255-401
  • Mfr. Part No. 266204 NZM4-XU24DC
Each
$568.91(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 268-517
  • Mfr. Part No. 3VA6110-8KQ31-0AA0
Each
$6,054.63(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-675
  • Mfr. Part No. 3VA6140-6HN31-0AA0
Each
$3,967.35(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM for use with N(S)2, NZM2
  • RS Stock No. 259-927
  • Mfr. Part No. 271454 NZM2-XDTV-NA
Each
$282.56(exc. GST)
Temporarily out of stock
Schneider Electric Multifix Cover for use with Circuit Breaker
  • RS Stock No. 275-8813
  • Mfr. Part No. LVS03220
1 Box of 5
$180.47(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7892
  • Mfr. Part No. C25F44V100
Each
$7,646.32(exc. GST)
Temporarily out of stock
Siemens SENTRON Cover Frame for use with 3VA57/58/59, 3VA67/68/69 Series
  • RS Stock No. 263-569
  • Mfr. Part No. 3VA9877-0SB20
Each
$472.49(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller Electronic Circuit Breaker 5kA IZMX/INX, Withdrawable
  • RS Stock No. 262-439
  • Mfr. Part No. 303686 IN63H3-50W-1
Each
$115,673.04(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-678
  • Mfr. Part No. 3VA6140-6JP41-0AA0
Each
$7,340.04(exc. GST)
Temporarily out of stock
Eaton Moeller IZMX Electronic Circuit Breaker 6.3kA IZM63, Withdrawable
  • RS Stock No. 263-088
  • Mfr. Part No. 303660 IZM63N3-P63W-1
Each
$141,137.77(exc. GST)
Temporarily out of stock
RS PRO 1.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8042
Each (In a Box of 500)
$1.471(exc. GST)
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