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

41 / 999+
In Stock
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 1P, 400V ac
  • RS Stock No. 189-5332
  • Mfr. Part No. X1062689 / CMC81I
Each
MYR60.75
In Stock
RS PRO 16A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-230
Each (In a Pack of 10)
MYR11.062
In Stock
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 867-4356
  • Mfr. Part No. 3101.0031
Each (In a Pack of 10)
MYR19.345
In Stock
Schneider Electric Acti9 iC60 RCCB, 32A, 4 Pole, 30mA, Type C, 380 → 415V ac
  • RS Stock No. 110-279
  • Mfr. Part No. A9D77432
Each
MYR3,738.36
In Stock
Littelfuse PCB Mount Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 894-9600
  • Mfr. Part No. 178.6164.0002
Each
MYR21.18
In Stock
Better World
Schneider Electric RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 201-2252
  • Mfr. Part No. A9DG3616
Each
MYR2,283.42
In Stock
Mersen 15A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4373
  • Mfr. Part No. ATQR15
Each
MYR164.84
In Stock
Siemens 25A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 395-806
  • Mfr. Part No. 3NC1025
Each (In a Pack of 10)
MYR98.179
In Stock
Eaton 32A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8639
  • Mfr. Part No. 32NHG000B
Each
MYR34.98
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3808
  • Mfr. Part No. 3VA2440-5MN32-0AA0
Each
MYR11,760.54
In Stock
ETI 25A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-686
  • Mfr. Part No. 2312407
Each (In a Pack of 5)
MYR6.202
In Stock
Siemens 20A DII Diazed Fuse, E27 Thread Size, gR, 500V
  • RS Stock No. 203-3953
  • Mfr. Part No. 5SD430
Each (In a Pack of 5)
MYR56.786
In Stock
Eaton 750mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3059
  • Mfr. Part No. GMA-750-R
Each
MYR3.25
In Stock
Eaton 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-8623
  • Mfr. Part No. S500-6.3-R
Each (In a Pack of 10)
MYR1.473
In Stock
Siemens 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 657-1429
  • Mfr. Part No. 3NC1091
Each (In a Pack of 12)
MYR114.464
Currently unavailable
Siemens SIRIUS 3 Phase Busbar, 690V
  • RS Stock No. 218-865
  • Mfr. Part No. 3RV2925-5AB
Each
MYR119.74
In Stock
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 419-088
  • Mfr. Part No. 0031.3901
Each (In a Pack of 5)
MYR26.364
In Stock
Mersen 35A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 377-0285
  • Mfr. Part No. R219826
Each (In a Pack of 5)
MYR13.828
In Stock
Eaton 160mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1284
  • Mfr. Part No. S500-160-R
Each (In a Pack of 10)
MYR2.061
In Stock
Legrand DX3 RCCB, 40A, 1+N Pole, 30mA, Type A
  • RS Stock No. 732-0049
  • Mfr. Part No. 4 116 17
Each
MYR819.31
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