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

46604 Products showing for Fuses & Circuit Breakers

9 / 999+
Siemens 16A D01 Neozed Fuse, gR, 400V
  • RS Stock No. 202-7244
  • Mfr. Part No. 5SE1316
Each (In a Pack of 10)
MYR79.65
Better World
Siemens Sentron 5SY4 MCB, 1P, 25A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1262
  • Mfr. Part No. 5SY4125-7
Each
MYR147.32
ABB RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type B, System Pro M Compact Range
  • RS Stock No. 201-6966
  • Mfr. Part No. 2CSR255080R2165 DS201 B16 AC100
Each
MYR664.57
SIBA 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3311
  • Mfr. Part No. 70-007-65/3.15A
Each (In a Pack of 10)
MYR1.032
RS PRO 6A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2494
Each (In a Pack of 5)
MYR19.742
RS PRO 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 188-4637
Each
MYR15.15
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 16A Current Rating
  • RS Stock No. 729-2764
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-16A
Each
MYR171.07
ETA REX12 Electronic Circuit breaker 4A 24V REX12-T, 1 channels , DIN Rail Mount
  • RS Stock No. 175-0366
  • Mfr. Part No. REX12-TA1-107-DC24V-4A
Each
MYR207.66
Eaton 12A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8380
  • Mfr. Part No. C10G12
Each (In a Pack of 10)
MYR7.418
ABB 24 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1906
  • Mfr. Part No. 1SL1204A00 65P12X22
Each
MYR343.56
ABB F200 RCCB, 100A, 4 Pole, 100mA, Type A, 277 V ac, 480 V ac
  • RS Stock No. 177-5089
  • Mfr. Part No. 2CSF204201R2900 F204 A S-100/0,1
Each
MYR2,291.89
Eaton PXF-A RCCB, 40A, 3+N Pole, 30mA, Type A, 400V ac
  • RS Stock No. 490-466
  • Mfr. Part No. 236776 PXF-40/4/003-A
Each
MYR306.80
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2805
  • Mfr. Part No. 2909909
Each
MYR319.81
ETI 10A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-658
  • Mfr. Part No. 2312404
Each (In a Pack of 5)
MYR5.536
32A Neutral Link x 9mm
  • RS Stock No. 262-976
  • Mfr. Part No. 32CML
1 Pack of 10
MYR273.33
Littelfuse 15A Screw Mount ATO Blade Fuse Block, 32V
  • RS Stock No. 250-6314
  • Mfr. Part No. 03500417TXN
Each
MYR108.68
ETA Thermal Circuit Breaker - 1410-L Single Pole 250V Voltage Rating PCB Mount, 630mA Current Rating
  • RS Stock No. 409-750
  • Mfr. Part No. 1410-L210-L2F1-S02-0.63A
Each
MYR62.65
RS PRO PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 767-5055
Each (In a Pack of 10)
MYR1.438
Eaton 25A DIN Rail Mount 6.3 x 32mm Fuse Block, 300V
  • RS Stock No. 233-0629
  • Mfr. Part No. BK-S-8301-1X-DIN
Each (In a Pack of 10)
MYR36.515
Limitor Thermal Fuse +55°C 2.5 A, 250V ac
  • RS Stock No. 176-9104
  • Mfr. Part No. P82 55 05100
Each
MYR25.37
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