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

111 / 999+
In Stock
Littelfuse 20A Panel Mount Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 787-4233
  • Mfr. Part No. 01550320ZXU
Each
MYR18.17
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 10A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7804
  • Mfr. Part No. 2CDS254001R0104 S204-C10
Each
MYR958.42
In Stock
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 20A
  • RS Stock No. 221-0898
  • Mfr. Part No. BGL36020LU
Each
MYR5,940.05
Temporarily out of stock
16A Fuse Holder for 36 x 71 x 81mm Fuse, 3P, 400V
  • RS Stock No. 262-604
  • Mfr. Part No. TFRN01C
1 Pack of 5
MYR590.17
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 0.5A Single Pole 65 V dc, 250V ac Voltage Rating, 500mA Current Rating
  • RS Stock No. 801-6898
  • Mfr. Part No. 0712152
Each
MYR97.53
In Stock
Schurter 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 712-4793P
  • Mfr. Part No. 0091.0001
Each (Supplied in a Box)
MYR91.78
In Stock
Eaton 80A Bolted Tag Fuse, 500 V dc, 690V ac, 63.5mm
  • RS Stock No. 182-1635
  • Mfr. Part No. 80ET
Each
MYR135.99
In Stock
Dehn Stainless Steel Lightning Earth Clamp Nominal Rod dia. 8-10mm
  • RS Stock No. 786-9358
  • Mfr. Part No. M8 UNI PV
Each
MYR112.91
In Stock
Littelfuse 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4195
  • Mfr. Part No. 0218.200MXP
Each (In a Pack of 10)
MYR4.775
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 226-0490
  • Mfr. Part No. 37005000000
Each (In a Pack of 10)
MYR4.138
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 40A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8612
  • Mfr. Part No. EZ9F16140
Each
MYR22.86
In Stock
Schneider Electric Multi 9 MCB, 1P, 4A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9174
  • Mfr. Part No. M9U21104
Each
MYR721.28
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 6A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-015
  • Mfr. Part No. 2CDS272001R0064 S202M-C6
Each
MYR356.83
Temporarily out of stock
ABB SU200 M MCB, 1P, 750mA Curve K, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-593
  • Mfr. Part No. 2CDS271337R0187
Each
MYR630.81
In Stock
ABB RCBO, 32A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5103
  • Mfr. Part No. 2CSR254001R1325
Each
MYR2,103.35
Temporarily out of stock
Legrand DX3 Circuit Breaker, 4P, 63A Curve C, 400V AC, 6 kA, 10 kA Breaking Capacity
  • RS Stock No. 266-1323
  • Mfr. Part No. 407904
Each
MYR2,846.79
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Radial 31mA, 125V ac/dc
  • RS Stock No. 878-1413
  • Mfr. Part No. 0273.031V
Each (In a Pack of 5)
MYR178.676
Limited stock
Limitor Thermal Fuse +150°C 5 A, 250V ac
  • RS Stock No. 124-5062
  • Mfr. Part No. A8-5AF
Each (In a Pack of 5)
MYR5.716
In Stock
HENSEL 1, 3 Phase Distribution Board, 24 Way, 63 A
  • RS Stock No. 183-2860
  • Mfr. Part No. KV9224M
Each
MYR969.94
In Stock
Eaton 630mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 851-1781
  • Mfr. Part No. GDB-630MA
Each (In a Pack of 5)
MYR28.036
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