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

46578 Products showing for Fuses & Circuit Breakers

140 / 999+
In Stock
Mersen 15A Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 715-8991
  • Mfr. Part No. DCT15-2
Each
MYR145.76
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 1A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 746-8166
  • Mfr. Part No. 2CDS272001R0011 S202M-D1
Each
MYR422.41
Temporarily out of stock
Better World
Siemens SENTRON 5SV6016 Fire Safety Circuit Breaker, 2P, 13A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 187-5255
  • Mfr. Part No. 5SV6016-6KK13
Each
MYR1,143.51
In Stock
Eaton 32A Rail Mount Fuse Holder for F1 Fuse, 1P, 550V ac
  • RS Stock No. 182-1565
  • Mfr. Part No. 32NNSFBSWHITE
Each
MYR127.97
Temporarily out of stock
Eaton 2A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8576
  • Mfr. Part No. STD2
1 Box of 20
MYR321.60
Temporarily out of stock
Siemens SENTRON 5SP4 MCB, 4P, 80A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6563
  • Mfr. Part No. 5SP4480-8
Each
MYR2,940.39
Temporarily out of stock
Better World
Siemens 5SV4446 RCCB, 63A, 4 Pole, 100mA, Type AC, 400V ac
  • RS Stock No. 231-8398
  • Mfr. Part No. 5SV4446-0
Each
MYR1,302.36
In Stock
Electro PJP Earth Rod W. 12mm x 420mm H. 420mm
  • RS Stock No. 263-9091
  • Mfr. Part No. 2223Drill
Each
MYR254.29
Temporarily out of stock
RS PRO Industrial Surge Protector, 2000A, 20 V, DIN Rail Mount
  • RS Stock No. 101-779
Each
MYR422.97
Temporarily out of stock
Schneider Electric Acti9 iID RCCB, 16A, 2 Pole, 30mA, Type B-EV, 230V
  • RS Stock No. 354-424
  • Mfr. Part No. A9Z51216
Each
MYR3,036.38
In Stock
Eaton 30A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 480V
  • RS Stock No. 225-8221
  • Mfr. Part No. BK-HVP-LW-HH-R
1 Bag of 100
MYR5,875.65
Being discontinued
RS PRO 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-481
Each (In a Pack of 10)
MYR1.675
In Stock
Mersen 4A Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 230-2948
  • Mfr. Part No. W222958
Each (In a Pack of 10)
MYR8.846
Temporarily out of stock
Socomec 10A Slow-Blow Cartridge Fuse, 14 x 51mm
  • RS Stock No. 223-2828
  • Mfr. Part No. 60530010
Each (In a Pack of 10)
MYR28.759
Temporarily out of stock
Eaton 2A Grey Blade Car Fuse, 32V ac/dc
  • RS Stock No. 852-7317
  • Mfr. Part No. ATM-2
Each
MYR9.35
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9358
  • Mfr. Part No. 3VA1150-4GE42-0AA0
Each
MYR2,425.89
In Stock
Better World
Siemens 5SV4342 RCCB, 25A, 4 Pole, 30mA, Type AC, 400V ac
  • RS Stock No. 231-8391
  • Mfr. Part No. 5SV4342-0
Each
MYR594.93
Temporarily out of stock
RS PRO 160mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8048
1 Box of 1000
MYR679.15
In Stock
RS PRO Three Phase Industrial Surge Protector, 50kA, 1.25kV, DIN Rail Mount
  • RS Stock No. 101-738
Each
MYR878.79
Temporarily out of stock
Schurter SMD Non Resettable Fuse 20A, 32 V ac, 63V dc
  • RS Stock No. 703-2786P
  • Mfr. Part No. 3413.0331.22
Each (Supplied on a Reel)
MYR2.406
1
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