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

78 of 999+
Phoenix Contact PTCB Electronic Circuit Breaker 8A 24V PTCB, 1 channels , DIN Rail Type E
  • RS Stock No. 535-869
  • Mfr. Part No. 1388391
Each
$81.31(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 70A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-576
  • Mfr. Part No. 3VA5270-6EF31-2AA0
Each
$2,690.93(exc. GST)
SIB Copper Earth Bar L. 30mm x W. 125mm x H. 25mm
  • RS Stock No. 270-5242
  • Mfr. Part No. P04389
1 Bag of 10
$88.02(exc. GST)
Schneider Electric 440V ac Circuit Trip for use with Compact NSX 100/160/250 Circuit Breakers
  • RS Stock No. 219-9423
  • Mfr. Part No. LV433880
Each
$5,979.34(exc. GST)
Hager Auxiliary Contact, 2 Contact, 2NO, DIN, MZ9
  • RS Stock No. 251-2076
  • Mfr. Part No. MZ905
Each
$829.21(exc. GST)
Mersen Surge Protector
  • RS Stock No. 179-3081
  • Mfr. Part No. 83020159 / STPT2-40K1500V-YPVM
Each
$666.25(exc. GST)
Eaton 50A British Standard Fuse, LET, 150 V dc, 240V ac, 41.8mm
  • RS Stock No. 156-8822
  • Mfr. Part No. 50LET
Each
$44.61(exc. GST)
Eaton 20A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 253-697
  • Mfr. Part No. 24TDMEJ20
Each
$383.21(exc. GST)
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-807
  • Mfr. Part No. Mi 1683
Each
$1,456.04(exc. GST)
RS PRO 3.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8043
Each (In a Box of 500)
$1.471(exc. GST)
Schneider Electric Tap Off, KSB12 Series
  • RS Stock No. 207-299
  • Mfr. Part No. KSB125HD502
Each
$3,034.08(exc. GST)
Schneider Electric Acti9 A9F MCB, 2P, 500mA Curve C, 415V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 288-7099
  • Mfr. Part No. A9F94270
Each
$804.97(exc. GST)
Eaton Fuse Holder Fuse Holder
  • RS Stock No. 261-465
  • Mfr. Part No. FRN01C
1 Pack of 15
$245.15(exc. GST)
Siemens Auxiliary Switch
  • RS Stock No. 223-7682
  • Mfr. Part No. 5TT4932
Each
$120.95(exc. GST)
RS PRO 3A Violet Blade Car Fuse, 32V dc
  • RS Stock No. 177-8054
1 Bag of 1000
$396.66(exc. GST)
Schneider Electric A9N RCCB, 125A, 3 Pole, 300mA, Type AC, 230 → 415V ac
  • RS Stock No. 654-560
  • Mfr. Part No. A9N18546
Each
$1,840.28(exc. GST)
Littelfuse 800mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4369
  • Mfr. Part No. 0217.800MXP
Each (In a Pack of 10)
$0.734(exc. GST)
Clipsal Electrical RCBO, 10A Current Rating, 3P+N Poles, 100mA Trip Sensitivity, Type A, Acti9 Range
  • RS Stock No. 281-5923
  • Mfr. Part No. A9DC2910
Each
$679.25(exc. GST)
Schurter 8040 Screw Mount Fuse Clip for 17.8 x 11.1mm
  • RS Stock No. 221-5663
  • Mfr. Part No. 8040.2002.01
Each (In a Pack of 5)
$1.906(exc. GST)
Eaton 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7089
  • Mfr. Part No. MDA-5-R
Each
$15.03(exc. GST)
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