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

68 / 999+
Eaton 1 Phase Surge Protector, 110 → 230 V dc, 12 → 110V ac, DIN Rail Mount
  • RS Stock No. 847-3686
  • Mfr. Part No. 102037 FAZ-XAA-NA12-110VAC
Each
MYR221.97
Littelfuse SMD Non Resettable Fuse 1A, 125V ac
  • RS Stock No. 769-3719
  • Mfr. Part No. 0451001.NRL
Each (In a Pack of 10)
MYR6.692
Schneider Electric Acti9 Acti9 Reflex MCB, 4P, 25A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 354-359
  • Mfr. Part No. A9C61425
Each
MYR2,534.50
RS PRO 6.3A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-195
Each (In a Pack of 10)
MYR11.684
Mersen 40A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7448
  • Mfr. Part No. J213609
Each (In a Pack of 10)
MYR27.002
Rittal Earthing Strap, 10mm² Wire Range
  • RS Stock No. 263-3734
  • Mfr. Part No. 2565100
Each (In a Pack of 5)
MYR41.018
Murrelektronik Limited Earthing Strap Tinned Copper
  • RS Stock No. 284-6551
  • Mfr. Part No. 4000-71001-1620006
Each
MYR74.98
Schneider Electric A9R RCCB, 63A, 4 Pole, 415V
  • RS Stock No. 207-401
  • Mfr. Part No. A9R22463
Each
MYR6,273.22
SES Sterling Earthing Strap Tinned Bronze 8 → 28mm Diameter, 2.5 → 6mm² Wire Range
  • RS Stock No. 236-5264
  • Mfr. Part No. 06190007000
1 Bag of 20
MYR252.33
ABB FH200 RCCB, 63A, 4 Pole, 30mA, Type AC, 230/400V ac
  • RS Stock No. 540-1666
  • Mfr. Part No. 2CSF204006R1630 FH204 AC-63/0,03
Each
MYR1,008.56
Mersen 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 230-3474
  • Mfr. Part No. D211028
Each (In a Pack of 10)
MYR12.895
Eaton FAZ-DC MCB, 2P, 4A
  • RS Stock No. 221-3495
  • Mfr. Part No. 279136 FAZ-C4/2-DC
Each
MYR664.60
Murrelektronik Limited Mico Pro Electronic Circuit Breaker 10A 24V 9000, 2 channels , DIN Rail
  • RS Stock No. 284-8054
  • Mfr. Part No. 9000-41092-0101000
Each
MYR546.66
ETI 35A DIII Diazed Fuse, E33 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-743
  • Mfr. Part No. 2313401
Each (In a Pack of 5)
MYR7.722
Eaton xEffect MCB, 2P, 15A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3134
  • Mfr. Part No. 278733 FAZ-B15/2
Each
MYR468.99
Eaton 15A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-1674
  • Mfr. Part No. KTK-15
Each
MYR161.20
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 63A Curve B, 440V AC, 180V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3420
  • Mfr. Part No. A9F76363
Each
MYR2,271.77
ABB System Pro M Compact S200 M UC MCB, 4P, 500mA Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-419
  • Mfr. Part No. 2CDS274061R0157
Each
MYR4,239.16
Phoenix Contact Surge Protector, ≤1.5kV, DIN Rail Mount
  • RS Stock No. 890-3746
  • Mfr. Part No. 2906101
Each
MYR271.92
Eaton 6A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8415
  • Mfr. Part No. C14G6
Each (In a Pack of 10)
MYR11.748
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