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

51 / 999+
RS PRO 3.15A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-173
Each (In a Pack of 10)
MYR15.039
RS PRO 6.3A PCB Mount Fuse Holder, 250V ac
  • RS Stock No. 611-9037
Each (In a Pack of 10)
MYR4.463
Eaton 2A Bolted Tag Fuse, A2, 550V ac, 73mm
  • RS Stock No. 181-8864
  • Mfr. Part No. AAO2
Each
MYR22.45
ABB 800A Tag Fuse, 200 x 89 x 119mm, 690V
  • RS Stock No. 250-4484
  • Mfr. Part No. 1SCA022701R1690
Each
MYR1,412.10
FUSE 125V PICO II SB RoHS 2A
  • RS Stock No. 552-265
  • Mfr. Part No. 0473002.MAT1L
1 Bag of 100
MYR494.97
RS PRO 16A Rail Mount Fuse Holder, 600V ac
  • RS Stock No. 501-809
Each (In a Pack of 10)
MYR31.974
Eaton 50A Cartridge Fuse, 21 x 87mm
  • RS Stock No. 229-256
  • Mfr. Part No. BAO50
1 Pack of 20
MYR2,430.55
Schneider Electric Tesys Circuit Breaker - TeSyS GB2 Single Pole 250V ac Voltage Rating Clip-On, 500mA Current Rating
  • RS Stock No. 589-844
  • Mfr. Part No. GB2CS05
1 Pack of 6
MYR1,582.23
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 25A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3395
  • Mfr. Part No. A9F76225
Each
MYR768.57
RS PRO 18A Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 277-3900
Each (In a Pack of 5)
MYR2.754
RS PRO 200A British Standard Fuse, A4, 415V ac, 93.7mm
  • RS Stock No. 521-2731
Each
MYR221.95
Mersen 20A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2942
  • Mfr. Part No. X211551
1 Box of 10
MYR210.43
Eaton 25A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 182-1661
  • Mfr. Part No. 25NHG01B
Each
MYR50.51
nVent ERICO Earth Bar
  • RS Stock No. 277-6235
  • Mfr. Part No. EEB04C506D1A
Each
MYR1,334.00
Eaton 15A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-1671
  • Mfr. Part No. FNQ-15
Each
MYR236.66
Keystone 20A PCB Mount Fuse Holder for 5.2 x 0.64mm Fuse, 500V ac
  • RS Stock No. 167-6068
  • Mfr. Part No. 3522-2
Each (In a Pack of 10)
MYR4.339
Littelfuse 40A Orange Blade Car Fuse, 32V dc
  • RS Stock No. 787-4145
  • Mfr. Part No. 0287040.PXCN
Each (In a Pack of 10)
MYR1.564
ETI 10A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-963
  • Mfr. Part No. 2211004
Each (In a Pack of 5)
MYR5.752
Schneider Electric, ComPacT MCCB 3P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 345-320
  • Mfr. Part No. C11F34V100B
Each
MYR14,009.64
Eaton 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 849-6033
  • Mfr. Part No. GDA-630MA
Each (In a Pack of 5)
MYR55.248
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