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

74 of 999+
Temporarily out of stock
RS PRO 500mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6063
Each (In a Pack of 10)
SGD0.877(exc. GST)
In Stock
ABB Earth & Neutral Terminal Bar for use with MCB
  • RS Stock No. 232-0026
  • Mfr. Part No. GJI2320131R0001 SZ-KLB 8
1 Box of 1
SGD14.57(exc. GST)
In Stock
Eaton 1A Black Blade Car Fuse, 32V dc
  • RS Stock No. 849-5611
  • Mfr. Part No. BK-ATC-1
Each
SGD1.56(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3398
  • Mfr. Part No. A9F54332
Each
SGD336.46(exc. GST)
Temporarily out of stock
Eaton xE?ect - FRCdM RCCB, 25A, 4 Pole, 300mA, 240/415V ac
  • RS Stock No. 120-919
  • Mfr. Part No. 167884 FRCDM-25/4/03-G/B+
Each
SGD1,316.64(exc. GST)
Currently unavailable
Altech Thermal Circuit Breaker - V-EA 2 Pole 480Y/277V Voltage Rating DIN Rail Mount, 1A Current Rating
  • RS Stock No. 899-1929
  • Mfr. Part No. 2GU1
Each
SGD61.63(exc. GST)
In Stock
Better World
Schneider Electric 2A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 181-2608
  • Mfr. Part No. DF2CA02
Each (In a Box of 10)
SGD13.474(exc. GST)
Limited stock
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 15A Current Rating
  • RS Stock No. 210-2067
  • Mfr. Part No. 3120-N521-H7T1-W01D-15A-U0000M
Each
SGD97.07(exc. GST)
Unavailable
Schneider Electric 690V ac Circuit Trip for use with Compact NSX 250 Circuit Breakers
  • RS Stock No. 219-9377
  • Mfr. Part No. LV431485
Each
SGD1,824.32(exc. GST)
In Stock
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 212-166
  • Mfr. Part No. A9D07616
Each
SGD138.66(exc. GST)
In Stock
Schneider Electric Surge Arrester, 40kA, 460V ac, Clip-On Mount
  • RS Stock No. 288-7109
  • Mfr. Part No. A9L40321
Each
SGD1,392.32(exc. GST)
In Stock
Schurter Surface Mount Fuse 1A, 250V ac
  • RS Stock No. 270-7926
  • Mfr. Part No. 0001.2704.11
Each
SGD1.23(exc. GST)
In Stock
ABB SA1 Padlock Adapter for use with S 260-270-280
  • RS Stock No. 455-2662
  • Mfr. Part No. GJF1101903R0001 SA1
Each
SGD11.04(exc. GST)
In Stock
RS PRO 40A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-4632
Each
SGD29.92(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-209
  • Mfr. Part No. 3VA5220-6ED31-2AA0
Each
SGD1,759.80(exc. GST)
Temporarily out of stock
Better World
Schneider Electric iID RCD, 40A, 100mA
  • RS Stock No. 776-3691
  • Mfr. Part No. A9R12240
Each
SGD344.00(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board Enclosure, 34 Way
  • RS Stock No. 339-624
  • Mfr. Part No. SEA9BN8SXS
Each
SGD939.55(exc. GST)
Temporarily out of stock
Eaton AFDD, 40A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Eaton Moeller Range
  • RS Stock No. 246-609
  • Mfr. Part No. 187237 AFDD-40/2/B/003-A
Each
SGD331.38(exc. GST)
Temporarily out of stock
ABB F200 RCCB, 80A, 4 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 225-6121
  • Mfr. Part No. 2CSF204001R3800 F204 AC-80/0,3
Each
SGD495.46(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Connector Monoconnect for use with Acti 9/Multi 9, Horizontal Comb Busbar for 18 mm Pitch
  • RS Stock No. 806-7405
  • Mfr. Part No. A9XPCM04
Each
SGD47.52(exc. GST)
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