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

31 of 999+
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1293
  • Mfr. Part No. 5SY4206-6
Each
SGD167.94(exc. GST)
In Stock
RS PRO 30A Rail Mount Fuse Holder for 5 x 20mm Fuse, 1P, 500V
  • RS Stock No. 242-0497
1 Bag of 10
SGD63.12(exc. GST)
Temporarily out of stock
Better World
ABB S200C MCB, 2P, 6A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1619
  • Mfr. Part No. 2CDS252280R0064
Each
SGD72.40(exc. GST)
Temporarily out of stock
Better World
Siemens RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 150-4175
  • Mfr. Part No. 5SU1354-6KK06
Each
SGD147.81(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 80A Curve D
  • RS Stock No. 221-0890
  • Mfr. Part No. A9N18512
Each
SGD635.10(exc. GST)
In Stock
Littelfuse 20A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 878-1669
  • Mfr. Part No. CCMR20
Each
SGD66.79(exc. GST)
Temporarily out of stock
ABB F200 RCCB, 40A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 537-7361
  • Mfr. Part No. 2CSF202001R1400 F202 AC-40/0,03
Each
SGD242.74(exc. GST)
In Stock
Eaton 20A Rail Mount Fuse Holder for A1 Fuse, 1P, 690V ac
  • RS Stock No. 182-1581
  • Mfr. Part No. RS20FWH
Each
SGD90.84(exc. GST)
In Stock
Eaton 160A NH Fuse, NH0, 500V ac
  • RS Stock No. 181-8809
  • Mfr. Part No. 160NHG0B
Each
SGD15.14(exc. GST)
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 3A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8596
  • Mfr. Part No. EZ9F16103
Each
SGD6.93(exc. GST)
Being discontinued
RS PRO 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6057
Each (In a Pack of 10)
SGD0.484(exc. GST)
New product - Preorder today
Schneider Electric 1+N Phase Surge Arrester, 20kA, 1.3kV, DIN Rail Mount
  • RS Stock No. 654-811
  • Mfr. Part No. EZ9L33620KIT
Each
SGD168.41(exc. GST)
Temporarily out of stock
Eaton 400A NH Fuse, NH3, 690V ac
  • RS Stock No. 181-8479
  • Mfr. Part No. 400NHG3B-690
1 Box of 3
SGD101.31(exc. GST)
Last RS stock
Eaton xEffect MCB, 2P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4719
  • Mfr. Part No. 239100 FAZ6-C6/2
Each
SGD107.04(exc. GST)
Being discontinued
RS PRO 3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-649
Each (In a Pack of 10)
SGD0.834(exc. GST)
In Stock
Siemens SIRIUS 3 Phase Busbar Protector, 690V
  • RS Stock No. 755-2971
  • Mfr. Part No. 3RV2925-5EB
Each
SGD47.19(exc. GST)
Temporarily out of stock
Eaton 350A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 182-1589
  • Mfr. Part No. 170M3818D
Each
SGD310.18(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 63A, Fixed Mount
  • RS Stock No. 254-6322
  • Mfr. Part No. C11N3TM063L
Each
SGD778.35(exc. GST)
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 63A, Breaking Capacity 25kA, Fixed Mount
  • RS Stock No. 260-9716
  • Mfr. Part No. LV510305
Each
SGD243.69(exc. GST)
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 25A, 2 Pole, 30mA, Type A
  • RS Stock No. 806-7332
  • Mfr. Part No. A9R21225
Each
SGD268.05(exc. GST)
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