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

49 / 999+
Eaton 160A NH Fuse, NH00, 660V
  • RS Stock No. 181-8861
  • Mfr. Part No. 160NHG00B-660
Each
MYR48.81
Mersen 35A DIII Diazed Fuse, E33 Thread Size, gG, 500V
  • RS Stock No. 377-0500
  • Mfr. Part No. C214063
Each (In a Pack of 5)
MYR22.082
Eaton 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8399
  • Mfr. Part No. C10G16
Each (In a Pack of 10)
MYR7.975
Siemens ALPHA Busbar
  • RS Stock No. 226-0832
  • Mfr. Part No. 8GK9733-0KK20
Each
MYR165.59
Eaton RCCB, 40A, 4 Pole, 300mA, Type B, 230 V ac, 400 V ac
  • RS Stock No. 203-9040
  • Mfr. Part No. 300300 PXF-40/4/03-B
Each
MYR2,384.49
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 100A Curve D
  • RS Stock No. 221-0891
  • Mfr. Part No. A9N18513
Each
MYR2,286.28
RS PRO 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-425
Each (In a Pack of 10)
MYR1.721
WJ Furse Copper Earth Clamp Max. Conductor Size 25 x 3mm 25mm
  • RS Stock No. 153-2964
  • Mfr. Part No. 7TCA083610R0010 CT105-H
Each (In a Pack of 10)
MYR62.992
Littelfuse PC Board Non Resettable Fuse, Radial 50mA, 125V ac
  • RS Stock No. 738-3309
  • Mfr. Part No. 39600500000
Each (In a Pack of 10)
MYR11.399
Phoenix Contact Busbar, 6.2mm Pitch
  • RS Stock No. 627-3406
  • Mfr. Part No. 3030271
Each (In a Pack of 5)
MYR21.466
Better World
Schneider Electric, ComPacT New Generation Circuit breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6357
  • Mfr. Part No. C25F3TM250
Each
MYR9,467.07
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 412-863
  • Mfr. Part No. 0031.1804
Each (In a Pack of 5)
MYR28.462
Mersen 2A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6748
  • Mfr. Part No. N084307
Each (In a Pack of 10)
MYR22.31
RS PRO 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5969
Each (In a Pack of 10)
MYR1.721
Siemens 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 397-363
  • Mfr. Part No. 3NA3805
Each (In a Pack of 3)
MYR42.90
Eaton 160A Solid Link for NH Fuses
  • RS Stock No. 255-347
  • Mfr. Part No. 263114 Z-NH-00/TR
1 Pack of 3
MYR176.33
RS PRO 2A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8140
Each (In a Pack of 20)
MYR3.872
ASSMANN WSW Surge Protector, 10kV, DIN Rail Mount
  • RS Stock No. 649-587
  • Mfr. Part No. DN-95421
Each
MYR217.89
Littelfuse Fuse Holder Water Proof Holder
  • RS Stock No. 738-2784
  • Mfr. Part No. FHAC0001ZXJ
Each
MYR23.94
Better World
Schneider Electric Multi 9 C60N MCB, 3P, 6A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2069
  • Mfr. Part No. M9F11306
Each
MYR568.85
Results per page
1
49
2329

Related links