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

46580 Products showing for Fuses & Circuit Breakers

68 / 999+
Siemens Fixing Bracket for use with Siemens PT Series Relays
  • RS Stock No. 758-6829
  • Mfr. Part No. LZS:PT17024
1 Bag of 10
MYR56.12
Legrand 125A Cartridge Fuse, 61 x 125mm, 500V
  • RS Stock No. 266-3183
  • Mfr. Part No. 0 165 50
1 Box of 3
MYR540.89
ABB System Pro M Compact S200 MCB, 1P, 6A Curve C, 230V AC, 72V DC, 20 kA Breaking Capacity
  • RS Stock No. 191-9458
  • Mfr. Part No. 2CDS251001R0064 S201-C6
Each
MYR128.13
ABB SMISSLINE TP S400E MCB, 1P, 8A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 176-829
  • Mfr. Part No. 2CCS551001R0085 - S401EB8
Each
MYR130.64
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 6A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8599
  • Mfr. Part No. EZ9F16106
Each
MYR41.55
Finder Busbar, 10 A - 250V, 15.4mm Pitch
  • RS Stock No. 123-2857
  • Mfr. Part No. 097.52
Each
MYR16.40
ABB F200 RCCB, 125A, 4 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 225-6117
  • Mfr. Part No. 2CSF204001R1950 F204 AC-125/0,03
Each
MYR6,719.22
Eaton RCD, 10A, 2 Pole, 30mA, Type C
  • RS Stock No. 922-8711
  • Mfr. Part No. 236077 PKNM-10/1N/C/003-MW
Each
MYR844.12
Hager RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 602-222
  • Mfr. Part No. ADC839F
Each
MYR1,212.88
Mersen 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6984
  • Mfr. Part No. S218194
Each (In a Pack of 10)
MYR8.423
Better World
ABB System Pro M Compact S200 MCB, 4P, 6A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7790
  • Mfr. Part No. 2CDS254001R0064 S204-C6
Each
MYR960.82
Eaton 100A Rail Mount Fuse Holder for A4 Fuse, 1P, 690V ac
  • RS Stock No. 221-651
  • Mfr. Part No. RS100P
Each
MYR553.93
Socomec 2A F Cartridge Fuse, 14 x 51mm
  • RS Stock No. 223-2823
  • Mfr. Part No. 60530002
Each (In a Pack of 10)
MYR37.358
Bosch Rexroth 384255 RCD, 30mA
  • RS Stock No. 279-7619
  • Mfr. Part No. 3842552214
Each
MYR1,726.27
Schneider Electric, ComPacT New Generation Circuit breaker 3P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6281
  • Mfr. Part No. C10F3
Each
MYR1,437.45
Siemens 125A Centred Tag Fuse, NH00, 500V ac
  • RS Stock No. 203-2107
  • Mfr. Part No. 3NA7832
Each (In a Pack of 3)
MYR39.723
Socomec 63A Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 172-3022
  • Mfr. Part No. 66000063
1 Box of 3
MYR193.69
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB Single Pole 50V dc Voltage Rating,
  • RS Stock No. 212-8782
  • Mfr. Part No. 2800840
Each
MYR233.39
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 25A, Breaking Capacity 25kA
  • RS Stock No. 260-9720
  • Mfr. Part No. LV510311
Each
MYR2,634.49
RS PRO 1.25A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-548
Each (In a Pack of 10)
MYR1.66
1
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