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

321 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9730
  • Mfr. Part No. 3VA1112-5FE42-0AA0
Each
MYR4,928.11
In Stock
Weidmüller 10A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 286-0183
  • Mfr. Part No. 2783230000
1 Box of 5
MYR272.84
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-4948
  • Mfr. Part No. 3VA1125-5EE46-0AA0
Each
MYR2,650.39
In Stock
Better World
Siemens Surge Protector, 127 → 240 V ac, 150 → 250V dc, Clip-On Mount
  • RS Stock No. 875-1084
  • Mfr. Part No. 3RT2936-1CD00
Each
MYR119.26
In Stock
Phoenix Contact Electronic Circuit Breaker 8A 24V PTCB, DIN Rail Mount
  • RS Stock No. 201-5438
  • Mfr. Part No. 2909910
Each
MYR208.21
In Stock
Siemens N 120 Power Supply, 29V dc dc Input, 640mA Output
  • RS Stock No. 287-8577
  • Mfr. Part No. N 120/02 / 5WG1120-1AB02
Each
MYR488.84
In Stock
Eaton xEffect MCB, 1P, 20A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6914
  • Mfr. Part No. 102091 FAZ-C20/1-NA
Each
MYR199.43
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7925
  • Mfr. Part No. C25H4TM160
Each
MYR11,583.77
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 63A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3060
  • Mfr. Part No. A9N18364
Each
MYR1,408.43
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 4P, 4A, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-344
  • Mfr. Part No. 2CDS254001R0338
Each
MYR2,524.85
In Stock
MECATRACTION Brass Earth Clamp 30mm
  • RS Stock No. 284-6334
  • Mfr. Part No. 1BR1430
1 Box of 10
MYR880.44
Temporarily out of stock
Eaton 80A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1548
  • Mfr. Part No. XS80
Each (In a Box of 10)
MYR324.961
Temporarily out of stock
Better World
Siemens Sentron 5SY4 MCB, 1+N, 16A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1445
  • Mfr. Part No. 5SY4516-8
Each
MYR430.02
In Stock
Eaton 5A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4162
  • Mfr. Part No. LP-CC-5
Each
MYR225.74
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 125A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9761
  • Mfr. Part No. LV516332
Each
MYR3,008.81
In Stock
Siemens 1 Phase Surge Arrester, 40kA, 3.7kV, DIN Rail Mount
  • RS Stock No. 269-9752
  • Mfr. Part No. 5SD7483-0KK02
Each
MYR740.55
In Stock
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 2.5A Current Rating
  • RS Stock No. 774-0109
Each
MYR15.66
Temporarily out of stock
Hager MMN MCB, 3P, 6.3A, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 602-126
  • Mfr. Part No. MMN306
Each
MYR1,932.60
In Stock
ABB S301 MCB, 1P, 16A Curve C, 415V AC, 125V DC, 25 kA Breaking Capacity
  • RS Stock No. 203-015
  • Mfr. Part No. 2CDS381001R0164
Each
MYR464.16
In Stock
Better World
Schneider Electric Acti9 iTG40 RCCB, 25A, 3+N Pole, 300mA, Type AC, 400V ac
  • RS Stock No. 238-3502
  • Mfr. Part No. A9Y15725
Each
MYR2,295.58
1
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