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

240 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 7 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-432
  • Mfr. Part No. 3VA5150-5ED41-0AA0
Each
$1,530.42(exc. GST)
Temporarily out of stock
Eaton 63A Fuse Holder for 57 x 54 x 201mm Fuse, 3P, 400V ac
  • RS Stock No. 247-075
  • Mfr. Part No. 100664 Z-D02/R/3-54
Each
$68.66(exc. GST)
Temporarily out of stock
Eaton 450A Tag Fuse, 3L, 1.5kV, 205mm
  • RS Stock No. 282-6484
  • Mfr. Part No. BSF-450G-3XL15
Each
$1,105.45(exc. GST)
Temporarily out of stock
Eaton NZM Undervoltage Release for use with N(S)4(-4), NZM4(-4)
  • RS Stock No. 123-101
  • Mfr. Part No. 171804 NZM4-XU18DC
Each
$577.09(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4663
  • Mfr. Part No. 3VA2140-7JP46-0AA0
Each
$3,872.46(exc. GST)
In Stock
Littelfuse Fuse Puller Fuse Kit
  • RS Stock No. 820-7274
  • Mfr. Part No. 00940480Z
Each
$112.59(exc. GST)
Currently unavailable
Schurter 6.3A Base Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 337-1951
  • Mfr. Part No. 0031.5101
Each (In a Pack of 10)
$2.026(exc. GST)
In Stock
Eaton 12A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8235P
  • Mfr. Part No. PV-12A10F
Each (Supplied in a Box)
$89.89(exc. GST)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-524
  • Mfr. Part No. 3VA9373-0JJ24
1 Kit
$768.37(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 450A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 256-522
  • Mfr. Part No. 3VA5445-7EC41-0AA0
Each
$8,992.23(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 0.5A Current Rating
  • RS Stock No. 729-2830
  • Mfr. Part No. 3600-P10-SI-0.5A
Each
$222.74(exc. GST)
Temporarily out of stock
Hager NKN MCB, 4P, 25A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 597-904
  • Mfr. Part No. NKN425
Each
$573.75(exc. GST)
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0246
  • Mfr. Part No. 8GK1031-1KK20
Each
$1,153.22(exc. GST)
Temporarily out of stock
Eaton 100A Fuse Holder for 125 x 60 x 36.6mm Fuse, 1P, 690V
  • RS Stock No. 229-022
  • Mfr. Part No. CM100F
1 Pack of 5
$546.44(exc. GST)
Temporarily out of stock
Bourns Surface Mount Fuse 4A, 65V dc
  • RS Stock No. 245-9261
  • Mfr. Part No. SF-1206SA400M-2
Each (On a Reel of 3000)
$0.963(exc. GST)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 125mA, 250V ac
  • RS Stock No. 767-5011
Each (In a Pack of 10)
$1.526(exc. GST)
Temporarily out of stock
Siemens 5SM24 RCCB, 63A, 4 Pole, 100mA, Type A, 400V
  • RS Stock No. 328-391
  • Mfr. Part No. 5SM2445-6
Each
$928.82(exc. GST)
Temporarily out of stock
Mersen 63A Slow-Blow Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 247-2697
  • Mfr. Part No. B217696
1 Box of 10
$291.61(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 2A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-716
  • Mfr. Part No. 3VA5102-1MH31-0AA0
Each
$1,020.03(exc. GST)
Temporarily out of stock
Bourns 40A Tag Fuse, 66mm, 500V ac, 24.1mm
  • RS Stock No. 254-4194
  • Mfr. Part No. PF-JT3-40
Each (In a Box of 80)
$30.242(exc. GST)
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