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

170 / 999+
Eaton 125mA Cartridge Fuse, 10 x 126mm
  • RS Stock No. 849-5563
  • Mfr. Part No. HVJ-1-8
Each
MYR409.14
Mersen 2A DI Diazed Fuse, E16 Thread Size, gG, 500V
  • RS Stock No. 377-0342
  • Mfr. Part No. W212539
Each (In a Pack of 5)
MYR20.644
Schurter SMD Non Resettable Fuse 500mA, 125 V dc, 250V ac
  • RS Stock No. 736-0734
  • Mfr. Part No. 3403.0163.24
Each (In a Pack of 10)
MYR3.572
RS PRO 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-082
1 Pack of 10
MYR949.38
Siemens Sentron Undervoltage Release for use with 3VA1 Series Circuit Breaker
  • RS Stock No. 874-4521
  • Mfr. Part No. 3VA9908-0BB11
Each
MYR1,041.46
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 1P, 2A Curve D, 277V AC
  • RS Stock No. 256-6785
  • Mfr. Part No. M9F43102
Each
MYR530.95
Schneider Electric C120 RCD, 125A, 300mA
  • RS Stock No. 776-2853
  • Mfr. Part No. A9N18543
Each
MYR2,956.76
Better World
Schneider Electric Earthing Strap Tinned Copper 160 x 10mm Diameter
  • RS Stock No. 219-9706
  • Mfr. Part No. NSYEL166D6
Each (In a Pack of 10)
MYR17.424
Siemens SENTRON 5SY8 MCB, 3P, 4A Curve D, 400V AC, 60V DC, 50 kA Breaking Capacity
  • RS Stock No. 610-465
  • Mfr. Part No. 5SY8304-8
Each
MYR1,319.71
Schneider Electric, PowerPact Circuit breaker 1P 15A, Breaking Capacity 14 kA, Clip-On
  • RS Stock No. 335-379
  • Mfr. Part No. BDL16015
Each
MYR1,303.45
Lovato 32A Rail Mount Fuse Holder, 1P+N, 690V ac
  • RS Stock No. 216-8280
  • Mfr. Part No. FB01F1M
Each
MYR54.49
Lovato 4 Phase Surge Protector, 50kA
  • RS Stock No. 216-8306
  • Mfr. Part No. SG24PA300
Each
MYR1,943.08
Lovato 32A Rail Mount Fuse Holder, 1P, 1kV
  • RS Stock No. 216-8277
  • Mfr. Part No. FB01D1PL
Each
MYR91.20
Lovato 32A Rail Mount Fuse Holder, 2P, 1kV
  • RS Stock No. 216-8279
  • Mfr. Part No. FB01D2PL
Each
MYR182.01
Lovato 4 Phase Surge Protector, 50kA
  • RS Stock No. 216-8307
  • Mfr. Part No. SG24PA300R
Each
MYR2,455.36
Lovato 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 216-8276
  • Mfr. Part No. FB01D1P
Each
MYR58.59
Lovato 1 Phase Surge Protector, 50kA
  • RS Stock No. 216-8297
  • Mfr. Part No. SG21NA300R
Each
MYR1,360.14
SIBA 500mA F Glass Cartridge Fuse, 5 x 30mm
  • RS Stock No. 361-8159
  • Mfr. Part No. 171530.0,5
Each (In a Pack of 10)
MYR9.811
Eaton 1A Slow-Blow Cartridge Fuse, 14 x 51mm
  • RS Stock No. 228-596
  • Mfr. Part No. C14M1 CYLINDRICAL FUSE 14 x 51 1A AM 690V AC
1 Pack of 10
MYR131.33
Eaton 100A Centred Tag Fuse, 1.13 x 4.63in, 300V ac, 92.2mm
  • RS Stock No. 773-3561
  • Mfr. Part No. LPJ-100SP
Each
MYR1,032.48
1
170
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