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

49110 Products showing for Fuses & Circuit Breakers

103 of 999+
Temporarily out of stock
Schurter 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 1kV
  • RS Stock No. 712-4790P
  • Mfr. Part No. 0091.0003
Each (Supplied in a Box)
SGD60.05(exc. GST)
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 500A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9793
  • Mfr. Part No. LV563305
Each
SGD1,946.87(exc. GST)
In Stock
Eaton 150mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-419
  • Mfr. Part No. TDC11-150-R
Each (In a Pack of 10)
SGD4.939(exc. GST)
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 2A Curve C, 250V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 622-0014
  • Mfr. Part No. 5SY4102-7
Each
SGD74.37(exc. GST)
In Stock
Eaton 1A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-251
  • Mfr. Part No. TDC10-1A
Each (In a Pack of 10)
SGD0.766(exc. GST)
Unavailable
Schneider Electric 440 → 550V ac Electronic Earth Leakage Circuit Trip for use with Compact NSX 100/160 Circuit
  • RS Stock No. 219-9348
  • Mfr. Part No. LV429215
Each
SGD3,465.82(exc. GST)
In Stock
Littelfuse 100A Yellow Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4397
  • Mfr. Part No. 0298100.ZXEH
Each
SGD8.85(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 3m, 25A, Canalis KBB Series
  • RS Stock No. 211-0369
  • Mfr. Part No. KBB25ED2303TW
Each
SGD286.79(exc. GST)
In Stock
Eaton 30A T Cartridge Fuse, 21 x 57mm
  • RS Stock No. 773-3546
  • Mfr. Part No. LPJ-30SP
Each
SGD151.78(exc. GST)
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0322
  • Mfr. Part No. 8GK1081-4KK20
Each
SGD1,846.59(exc. GST)
In Stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS Stock No. 254-555
  • Mfr. Part No. 266632 NZM1-XHBR
Each
SGD207.05(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4763
  • Mfr. Part No. 3VA2163-7KQ46-0AA0
Each
SGD3,395.11(exc. GST)
Temporarily out of stock
ABB 400A Tag Fuse, 150 x 40 x 84mm, 500V
  • RS Stock No. 251-3488
  • Mfr. Part No. 1SCA022627R6780
Each
SGD93.08(exc. GST)
In Stock
Siemens 24V dc Undervoltage Release Circuit Trip for use with 3RV2 Series Circuit Breakers
  • RS Stock No. 706-1923
  • Mfr. Part No. 3RV2902-1AB4
Each
SGD199.89(exc. GST)
In Stock
RS PRO 6.3 A PCB Mount Fuse Holder, 1P for 5 x 20 mm, 250 V
  • RS Stock No. 277-3911
Each (In a Pack of 5)
SGD4.416(exc. GST)
In Stock
Schneider Electric Acti 9 Bell Transformer for use with Canalis
  • RS Stock No. 247-1920
  • Mfr. Part No. A9A15216
Each
SGD129.46(exc. GST)
In Stock
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 201-2260
  • Mfr. Part No. A9DE3616
Each
SGD365.17(exc. GST)
In Stock
Better World
Schneider Electric Industrial Surge Protection, 5kA, DIN Rail Mount
  • RS Stock No. 247-1960
  • Mfr. Part No. A9L20501
Each
SGD673.98(exc. GST)
In Stock
WJ Furse Earth Stud W. 157.48mm x 25.4mm H. 15.748mm
  • RS Stock No. 124-2513
  • Mfr. Part No. 7TCA083160R0054 ST200
Each (In a Pack of 10)
SGD35.033(exc. GST)
Temporarily out of stock
Eaton xEffect FAZ MCB, 3P, 8A, Type Z, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 259-213
  • Mfr. Part No. 278925 FAZ-Z8/3
Each
SGD273.75(exc. GST)
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