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

1770 Products showing for Fuses & Circuit Breakers

1 of 89
In Stock
Schneider Electric RCBO, 32A Current Rating, 3P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-790
  • Mfr. Part No. A9DC3732
Each
Kr. 2 375,75(exc. VAT)
In Stock
Mersen 3.15A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-852
  • Mfr. Part No. B085377Q
1 Box of 10
Kr. 168,38(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 Acti9 Reflex MCB, 4P, 16A Curve D, 500V AC, 15 kA Breaking Capacity
  • RS Stock No. 444-436
  • Mfr. Part No. A9C66416
Each
Kr. 7 771,33(exc. VAT)
In Stock
Schneider Electric Resi9 R9F23 Circuit Breaker, 3P, 32A Curve B, 400V AC, 6000 A Breaking Capacity
  • RS Stock No. 655-489
  • Mfr. Part No. R9F23332
Each
Kr. 1 154,30(exc. VAT)
Temporarily out of stock
Siemens ALPHA Busbar
  • RS Stock No. 610-694
  • Mfr. Part No. 8GS4010-7
Each
Kr. 851,14(exc. VAT)
In Stock
nVent ERICO DPCB Busbar
  • RS Stock No. 646-833
  • Mfr. Part No. 550400
Each
Kr. 1 187,28(exc. VAT)
Temporarily out of stock
Siemens 500A Tag Fuse, 137mm, 750V
  • RS Stock No. 608-687
  • Mfr. Part No. 3NB1137-1KK11
1 Pack of 3
Kr. 7 455,45(exc. VAT)
Temporarily out of stock
Siemens 500A Tag Fuse, 141mm, 750V, 107.2mm
  • RS Stock No. 608-832
  • Mfr. Part No. 3NE4334-3
1 Pack of 3
Kr. 6 692,86(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 2P, 1A, Type A, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-417
  • Mfr. Part No. 5SY4201-5
Each
Kr. 1 418,56(exc. VAT)
In Stock
Mersen 3.15A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-811
  • Mfr. Part No. G095571Q
1 Box of 10
Kr. 120,78(exc. VAT)
In Stock
Schneider Electric Acti9 A9F MCB Mini Circuit Breaker, 2P, 16A Curve C, 500V AC, 10 kA Breaking Capacity
  • RS Stock No. 653-861
  • Mfr. Part No. A9F74216
Each
Kr. 914,79(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 2P, 4A Curve D, 440V AC, 60V DC, 50 kA Breaking Capacity
  • RS Stock No. 664-372
  • Mfr. Part No. 5SY8204-8
Each
Kr. 1 853,28(exc. VAT)
Temporarily out of stock
Schneider Electric RCBO, 16A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-647
  • Mfr. Part No. A9D67416
Each
Kr. 3 855,28(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY6 MCB, 4P, 25A Curve B, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-337
  • Mfr. Part No. 5SY6625-6
Each
Kr. 1 475,76(exc. VAT)
In Stock
Schneider Electric Acti9 3, 3+N Phase Busbar, 230/400V ac, 9mm Pitch
  • RS Stock No. 654-802
  • Mfr. Part No. A9XPC724
Each
Kr. 798,25(exc. VAT)
In Stock
Mersen 500mA Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-879
  • Mfr. Part No. S085369Q
1 Box of 10
Kr. 204,91(exc. VAT)
New product - Preorder today
Schneider Electric RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-836
  • Mfr. Part No. A9D19232
Each
Kr. 4 363,08(exc. VAT)
Temporarily out of stock
Hager BFF RCCB, 25A, 4 Pole, 300mA, Type F
  • RS Stock No. 602-068
  • Mfr. Part No. BFF825
Each
Kr. 4 819,44(exc. VAT)
Temporarily out of stock
Siemens 500A Tag Fuse, 148mm, 750V
  • RS Stock No. 608-690
  • Mfr. Part No. 3NB1237-1KK15
1 Pack of 3
Kr. 8 808,34(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 1P, 2A Curve D, 440V AC, 60V DC, 50 kA Breaking Capacity
  • RS Stock No. 664-353
  • Mfr. Part No. 5SY7102-8
Each
Kr. 550,26(exc. VAT)
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