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

34912 Products showing for Fuses & Circuit Breakers

1735 of 999+
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 80A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9623
  • Mfr. Part No. 3VA10804ED460AA0
Each
$1,140.40(exc. GST)
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0928
  • Mfr. Part No. 3WA9111-0EK33
1 Set
$452.39(exc. GST)
Siemens ALPHA Distribution Board
  • RS Stock No. 629-382
  • Mfr. Part No. 8GK1383-1KK54
Each
$2,468.73(exc. GST)
Schneider Electric Cross Elbow Busbar Trunking, 290 → 1200mm, 630A, Canalis Series
  • RS Stock No. 335-030
  • Mfr. Part No. KSA630DMBK43F
Each
$7,225.67(exc. GST)
Sato Parts F-200 Series Fuse Cover for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse
  • RS Stock No. 229-4963
  • Mfr. Part No. F-200-C
Each
$0.97(exc. GST)
RS PRO PC Board Non Resettable Fuse, Axial 750mA, 250V ac
  • RS Stock No. 764-9545P
Each (Supplied on a Reel)
$0.998(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4760
  • Mfr. Part No. 3VA2163-7KQ32-0AA0
Each
$4,356.01(exc. GST)
Schurter SMD Non Resettable Fuse 160mA, 250 V ac, 125V dc
  • RS Stock No. 703-2723P
  • Mfr. Part No. 3404.2408.22
Each (Supplied on a Reel)
$2.173(exc. GST)
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3111
  • Mfr. Part No. 1SDA070964R1
Each
$12,637.75(exc. GST)
Bourns 3.3A Resettable Fuse, 16V
  • RS Stock No. 245-9162P
  • Mfr. Part No. MF-LSMF330/16X-2
Each (Supplied on a Reel)
$1.748(exc. GST)
Fuse - Strip 60 w/ Housing 48VDC, 63A
  • RS Stock No. 522-966
  • Mfr. Part No. 157.5701.5631
1 Pack of 50
$1,740.04(exc. GST)
Siemens ALPHA Distribution Board
  • RS Stock No. 629-318
  • Mfr. Part No. 8GK1383-1KK33
Each
$1,820.41(exc. GST)
Schneider Electric MasterPact Adapter for use with Masterpact MasterPact MTZ1 Circuit Breaker
  • RS Stock No. 654-884
  • Mfr. Part No. LV833642SP
Each
$904.60(exc. GST)
Fuse - Strip 60 w/ Housing 48VDC, 63A
  • RS Stock No. 522-968
  • Mfr. Part No. 157.5701.5631
1 Bag of 25
$913.66(exc. GST)
Schneider Electric EasyPact Electronic Circuit Breaker 32A, Fixed
  • RS Stock No. 122-506
  • Mfr. Part No. LV510562
Each
$543.00(exc. GST)
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 3 kA
  • RS Stock No. 245-443
  • Mfr. Part No. 3VA6225-5JQ41-2AA0
Each
$9,937.13(exc. GST)
Lovato 2 Phase Surge Protector, 50kA
  • RS Stock No. 216-8301
  • Mfr. Part No. SG22PA300R
Each
$462.13(exc. GST)
SUT 6.3x32 Time Lag 10A 250VAC 100VDC
  • RS Stock No. 577-302
  • Mfr. Part No. 8020.0602.H
Each
$1.42(exc. GST)
Circuit-breaker/thermal 5 A
  • RS Stock No. 577-270
  • Mfr. Part No. 4400.0006
Each
$9.54(exc. GST)
Siemens SENTRON 3VA9 Plug In Unit for use with 3VA1 160
  • RS Stock No. 218-1783
  • Mfr. Part No. 3VA9113-0KP00
Each
$869.45(exc. GST)
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