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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

83 / 999+
In Stock
WJ Furse Copper Earth Bar L. 900mm x W. 90mm x H. 96mm 12 Ways
  • RS Stock No. 124-2507
  • Mfr. Part No. 7TCA083670R0605 LK207-12
Each
MYR2,203.00
In Stock
Legrand 40A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 180-6123
  • Mfr. Part No. 0 143 40
Each (In a Box of 10)
MYR26.355
In Stock
RS PRO 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-330
Each (In a Pack of 10)
MYR1.523
Limited stock
Hager 2 Phase Busbar
  • RS Stock No. 144-4830
  • Mfr. Part No. KB263A
Each
MYR136.06
In Stock
RS PRO 15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 611-0030
Each (In a Pack of 10)
MYR3.425
Temporarily out of stock
ABB RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9929
  • Mfr. Part No. 2CSR255151R1065 DSE201 B6 A30
Each
MYR410.17
In Stock
Better World
Siemens 5SV3 RCCB, 25A, 2 Pole, 30mA, Type A
  • RS Stock No. 124-7727
  • Mfr. Part No. 5SV3312-6
Each
MYR808.70
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 100A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9688
  • Mfr. Part No. 2CDS254001R0824 S204-C100 6kA
1 Box of 1
MYR1,354.39
In Stock
Schneider Electric RCBO, 10A Current Rating, 1P Poles, Type B, Acti9 Range
  • RS Stock No. 207-167
  • Mfr. Part No. A9D56810
Each
MYR1,004.96
Temporarily out of stock
Eaton 100A Rail Mount Fuse Holder, 1P, 460 V dc, 660 → 690V ac
  • RS Stock No. 182-1419
  • Mfr. Part No. RS100PWH
Each (In a Box of 5)
MYR959.636
In Stock
ABB High Performance S800N MCB, 3P, 100A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-396
  • Mfr. Part No. 2CCG001233R0001
Each
MYR1,826.33
In Stock
RS PRO 3.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8132
Each (In a Pack of 20)
MYR2.154
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 20A Curve C, 500V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3212
  • Mfr. Part No. A9N61532
Each
MYR705.86
Temporarily out of stock
Eaton RCCB, 63A, 2 Pole, 100mA, Type AC, 230V ac
  • RS Stock No. 227-0739
  • Mfr. Part No. 264287 PFGM-63/2/01
Each
MYR1,892.41
In Stock
Schneider Electric Acti9 Active iDT40 AFDD, 25A, 1+N Pole
  • RS Stock No. 238-3485
  • Mfr. Part No. A9TYAE625
Each
MYR4,209.56
In Stock
Better World
ABB Compact Home SH200 MCB, 2P, 6A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9655
  • Mfr. Part No. 2CDS212001R0064 SH202-C 6
1 Box of 1
MYR263.93
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 5A, 125V ac/dc
  • RS Stock No. 878-1754
  • Mfr. Part No. 0273005.H
Each
MYR39.49
In Stock
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 273-0854
  • Mfr. Part No. 1658-G21-02-P10-5A
Each
MYR31.41
In Stock
ABB System Pro M Compact S200 M UC MCB, 4P, 2A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-814
  • Mfr. Part No. 2CDS274061R0024
Each
MYR2,488.63
In Stock
Littelfuse 2A Grey Blade Car Fuse, 32V dc
  • RS Stock No. 787-4117
  • Mfr. Part No. 0297002.WXNV
Each (In a Pack of 10)
MYR1.376
1
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