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

121 / 999+
Temporarily out of stock
Mersen Surge Protector
  • RS Stock No. 179-3066
  • Mfr. Part No. 83230111 / STPT23-20K275V-2PG-LFM
Each
MYR565.95
In Stock
Schneider Electric, ComPacT NSX MCCB 3P 100A, Fixed Mount
  • RS Stock No. 254-6269
  • Mfr. Part No. C1032D100
Each
MYR2,190.45
Last RS stock
ABB RCCB, 10A, 2 Pole, 30mA, Type C, 240V ac
  • RS Stock No. 246-2379
  • Mfr. Part No. 2CCG001698R0001
Each
MYR1,305.05
In Stock
Eaton, NZM MCCB 3P 160A, Breaking Capacity 80 kA, Fixed Mount
  • RS Stock No. 628-8076
  • Mfr. Part No. 266005 PN2-160
1 Box of 1
MYR2,362.86
Temporarily out of stock
ABB MCCB 4P 250A, Breaking Capacity 27 kA
  • RS Stock No. 192-0833
  • Mfr. Part No. 1SDA068070R1
Each
MYR8,708.62
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 2A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3436
  • Mfr. Part No. A9F74102
Each
MYR313.90
In Stock
Mersen 63A FF Cartridge Fuse, 22 x 58mm
  • RS Stock No. 136-0591
  • Mfr. Part No. D1018627 / FR22GR69V63T
Each
MYR159.21
In Stock
RS PRO 20A Bolted Tag Fuse, 120 V dc, 240V ac, 41.8mm
  • RS Stock No. 221-3637
Each (In a Pack of 5)
MYR31.866
In Stock
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS Stock No. 776-2831
  • Mfr. Part No. A9XPT920
Each
MYR165.18
In Stock
ABB System Pro M Compact S200M MCB, 3P, 20A Curve C, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-4295
  • Mfr. Part No. 2CDS273001R0204 S203M-C20
Each
MYR506.52
Being discontinued
RS PRO 15A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6051
Each (In a Pack of 10)
MYR1.727
Temporarily out of stock
Eaton 30A F Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 851-1955
  • Mfr. Part No. FWP-30A14F
Each
MYR365.57
In Stock
Littelfuse 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 769-0152
  • Mfr. Part No. 03455LF1H
Each (In a Pack of 5)
MYR23.454
Temporarily out of stock
ABB MCCB 3P 160A, Breaking Capacity 25 kA
  • RS Stock No. 192-0818
  • Mfr. Part No. 1SDA067399R1
Each
MYR3,320.45
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 500V ac
  • RS Stock No. 287-5799
  • Mfr. Part No. N218213
Each
MYR54.50
Temporarily out of stock
ABB F200 RCCB, 125A, 4 Pole, 300mA, Type B, 400V ac
  • RS Stock No. 176-9628
  • Mfr. Part No. F204B-125/0.3
Each
MYR29,508.14
Temporarily out of stock
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6960
  • Mfr. Part No. 2CSR255080R1404 DS201 C40 AC30
Each
MYR866.26
In Stock
ABB Tmax XT Handle, Lockable for use with Circuit Breaker
  • RS Stock No. 232-0191
  • Mfr. Part No. 1SDA066475R1 RHD XT1-XT3 F/P
Each
MYR571.85
In Stock
Murrelektronik Limited Electronic Circuit Breaker
  • RS Stock No. 123-6690
  • Mfr. Part No. 9000-41034-0401000
Each
MYR1,512.53
In Stock
Eaton 4A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-914
  • Mfr. Part No. TDC10-4A
Each (In a Pack of 10)
MYR2.409
1
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