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

42 / 999+
Mersen 100A NH Fuse, NH0, 690V ac
  • RS Stock No. 136-0620
  • Mfr. Part No. X227881 / NH0AM69V100
Each
MYR89.02
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 100A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9735
  • Mfr. Part No. LV510337
Each
MYR2,223.60
ABB 4 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS Stock No. 811-1880
  • Mfr. Part No. 1SL1200A00 65P04X12
Each
MYR131.30
Mersen 25A NH Fuse, NH000, 690V ac
  • RS Stock No. 270-3083
  • Mfr. Part No. M228447
Each
MYR91.07
Siemens 80A NH Fuse, NH00, 500V ac
  • RS Stock No. 397-420
  • Mfr. Part No. 3NA6824-7
Each (In a Pack of 3)
MYR41.557
32A Neutral Link x 9mm
  • RS Stock No. 262-976
  • Mfr. Part No. 32CML
1 Pack of 10
MYR273.33
Siemens 35A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1102
  • Mfr. Part No. 5SE2335
Each (In a Pack of 10)
MYR21.57
Eaton 17.5A T Cartridge Fuse, 21 x 57mm
  • RS Stock No. 182-1607
  • Mfr. Part No. LPJ-17-1-2SP
Each
MYR611.56
Better World
ABB Compact Home SH200 MCB, 1P, 6A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 539-8201
  • Mfr. Part No. 2CDS211001R0064 SH201-C6
Each
MYR83.66
Better World
Schneider Electric Circuit Trip
  • RS Stock No. 219-9354
  • Mfr. Part No. LV429386
Each
MYR732.38
Schneider Electric, Acti9, 32A, Energy Sensor, 3.5VA, Wireless
  • RS Stock No. 276-8717
  • Mfr. Part No. A9C15907
Each
MYR1,173.59
Mersen 32A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 304-1048
  • Mfr. Part No. A214107
Each (In a Pack of 10)
MYR8.392
Phoenix Contact 1 Phase Surge Arrester, DIN Rail Mount
  • RS Stock No. 131-799
  • Mfr. Part No. 2921080
Each
MYR1,852.99
Schneider Electric Resi9 R9F2 MCB, 1P, 13A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-139
  • Mfr. Part No. R9F23113
Each
MYR93.15
Mersen 630A size 32 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2158
  • Mfr. Part No. M300069
Each
MYR1,152.08
Better World
Siemens SENTRON 5SL4 MCB, 3P, 3A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-7453
  • Mfr. Part No. 5SL4303-7
Each
MYR578.37
RS PRO 15A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8139
Each (In a Pack of 50)
MYR1.553
Mersen 0.25 → 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 247-2717
  • Mfr. Part No. C229864
1 Box of 1
MYR1,782.40
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6935
  • Mfr. Part No. 2CSR255080R1165 DS201 B16 AC30
Each
MYR925.33
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 30A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2448
  • Mfr. Part No. M9F43230
Each
MYR707.34
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