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

26 / 999+
Siemens 63A DIII Diazed Fuse, 440 V dc, 500V ac
  • RS Stock No. 232-2058
  • Mfr. Part No. 5SB4311
Each (In a Pack of 25)
MYR7.322
RS PRO 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-429
Each (In a Pack of 10)
MYR1.348
RS PRO 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-384
Each (In a Pack of 10)
MYR1.618
Littelfuse 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4684
  • Mfr. Part No. 0215002.MXP
Each (In a Pack of 10)
MYR5.291
Mersen 400A NH Fuse, NH2, 500V ac
  • RS Stock No. 375-9733
  • Mfr. Part No. N211083
Each
MYR140.98
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 32A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2361
  • Mfr. Part No. M9F22132
Each
MYR164.52
Eaton Eaton Distribution Parts End cap for Busbar for use with BB-UL Busbar
  • RS Stock No. 232-202
  • Mfr. Part No. 122001 BB-UL-EC/3
1 Pack of 10
MYR37.00
RS PRO 3A Violet Blade Car Fuse, 32V dc
  • RS Stock No. 563-712
Each (In a Pack of 10)
MYR3.363
Legrand DX3 RCCB, 40A, 1+N Pole, 30mA, Type A
  • RS Stock No. 732-0049
  • Mfr. Part No. 4 116 17
Each
MYR819.31
ABB F200 RCCB, 40A, 4 Pole, 30mA, Type A, 230/400V ac
  • RS Stock No. 177-5057
  • Mfr. Part No. 2CSF204401R1400 F204 A-40/0,03 AP-R
Each
MYR981.04
Mersen 1A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 270-3119
  • Mfr. Part No. V090569
Each (In a Box of 10)
MYR3.558
Eaton 15A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4188
  • Mfr. Part No. LP-CC-15
Each
MYR290.05
Littelfuse PC Board Non Resettable Fuse, Axial 250mA, 125V ac/dc
  • RS Stock No. 541-3243P
  • Mfr. Part No. 0251.250HAT1L
Each (Supplied in a Bag)
MYR6.975
SIBA 2A F Glass Cartridge Fuse, 5 x 30mm
  • RS Stock No. 361-8187
  • Mfr. Part No. 171530.2
Each (In a Pack of 10)
MYR13.034
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-7545
  • Mfr. Part No. C11B4TM063L
Each
MYR2,847.41
Eaton 100A Rail Mount Fuse Holder for A4 Fuse, 1P, 690V ac
  • RS Stock No. 413-939
  • Mfr. Part No. RS100H
Each
MYR380.88
Better World
Schneider Electric iC60 RCD, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 734-9191
  • Mfr. Part No. A9Q14425
Each
MYR1,641.36
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 3 channels
  • RS Stock No. 156-827
  • Mfr. Part No. 3VA2216-5HM32-0AA0
Each
MYR9,672.65
Better World
Schneider Electric Multi 9 MCB, 3P, 25A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9133
  • Mfr. Part No. M9F22325
Each
MYR1,196.10
Better World
Siemens RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 151-1205
  • Mfr. Part No. 5SU1356-6KK06
Each
MYR439.83
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