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

46578 Products showing for Fuses & Circuit Breakers

215 / 999+
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 250A, Fixed Mount
  • RS Stock No. 254-6352
  • Mfr. Part No. C25F3
Each
MYR3,809.08
Limited stock
Limitor Thermal Fuse +151°C 2 A, 250V ac
  • RS Stock No. 176-9407
  • Mfr. Part No. SM 146 A0
Each (In a Pack of 5)
MYR5.548
In Stock
RS PRO 30A Rail Mount Fuse Holder for 5 x 20mm Fuse, 1P, 500V
  • RS Stock No. 242-0497
1 Bag of 10
MYR198.29
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9730
  • Mfr. Part No. 3VA1112-5FE42-0AA0
Each
MYR4,928.11
In Stock
Phoenix Contact 2A Tag Fuse, 250V
  • RS Stock No. 133-593
  • Mfr. Part No. 2906444
Each
MYR134.61
Temporarily out of stock
Schneider Electric Resi9 3 Phase Busbar, 230V ac, 18mm Pitch
  • RS Stock No. 358-458
  • Mfr. Part No. R9PXV4
Each
MYR454.32
Temporarily out of stock
Siemens SENTRON 3 Phase Busbar, 230V, 17.6mm Pitch
  • RS Stock No. 187-5235
  • Mfr. Part No. 5ST3783-0KL
Each
MYR248.55
In Stock
Eaton 25A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4276
  • Mfr. Part No. KTK-R-25
Each
MYR166.90
Temporarily out of stock
Eaton 125A Centred Tag Fuse, NH0, 500V ac
  • RS Stock No. 703-8686
  • Mfr. Part No. 125NHG0B
Each
MYR52.87
In Stock
Better World
Schneider Electric Compact Nsx, Easypact Cvs Cable Connector for use with 2 Cables 35 mm2 →240 mm2
  • RS Stock No. 221-1229
  • Mfr. Part No. LV432481
Each
MYR1,067.78
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 63A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 272-7446
  • Mfr. Part No. C10F6TM063
Each
MYR3,180.35
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 32A Curve D
  • RS Stock No. 231-9675
  • Mfr. Part No. 2CDS251103R0321 S201-D32 N
1 Box of 1
MYR608.87
In Stock
Mersen 25A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2931
  • Mfr. Part No. W212585
1 Box of 10
MYR210.43
In Stock
Eaton 500A Centred Tag Fuse, NH2, 690 V, 700 V
  • RS Stock No. 182-1359
  • Mfr. Part No. 170M5810D
Each (In a Box of 3)
MYR1,835.447
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA , 4 channels , Withdrawable
  • RS Stock No. 132-912
  • Mfr. Part No. 183805 IZMX40H4-V16W-1
Each
MYR76,173.34
Currently unavailable
Schurter SMD Non Resettable Fuse 4A, 125 V dc, 250V ac
  • RS Stock No. 736-0762P
  • Mfr. Part No. 3403.0172.24
Each (Supplied on a Reel)
MYR3.257
In Stock
ETI 4A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-636
  • Mfr. Part No. 2312402
Each (In a Pack of 5)
MYR7.442
In Stock
HENSEL 1, 3 Phase Distribution Board, 6 Way, 63 A
  • RS Stock No. 183-2855
  • Mfr. Part No. KV7106
Each
MYR335.22
Temporarily out of stock
Legrand RCD Switch, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, DX Range
  • RS Stock No. 731-9871
  • Mfr. Part No. 4 107 83
Each
MYR2,292.85
Temporarily out of stock
RS PRO Three Phase Industrial Surge Protector, 50kA, 1.25kV, DIN Rail Mount
  • RS Stock No. 101-736
Each
MYR599.50
1
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