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

46579 Products showing for Fuses & Circuit Breakers

2316 / 999+
Siemens ALPHA Connecting Terminals for use with ALPHA 400-ZS
  • RS Stock No. 216-5993
  • Mfr. Part No. 8GS4034-2
Each
MYR202.25
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-3745
  • Mfr. Part No. 3VA1196-4EE32-0AA0
Each
MYR1,895.12
Siemens, SENTRON MCCB 3P 320A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 270-3476
  • Mfr. Part No. 3VA1332-4EF32-0KG0
Each
MYR10,173.86
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-4740
  • Mfr. Part No. 1SDA073021R1
Each
MYR59,565.71
Eaton 3A Resettable Fuse, 6V
  • RS Stock No. 225-8272
  • Mfr. Part No. PTSLR12106V300
1 Reel of 3000
MYR5,405.40
Siemens SENTRON Terminal for use with 3VA5/6 400/600
  • RS Stock No. 269-7196
  • Mfr. Part No. 3VA9473-0JH13
Each (In a Pack of 3)
MYR435.387
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3348
  • Mfr. Part No. 1SDA071263R1
Each
MYR171,263.07
Mersen 12A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0565
  • Mfr. Part No. D1017201 / FR14GR69V12
Each
MYR61.91
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3315
  • Mfr. Part No. 1SDA071223R1
Each
MYR136,508.72
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9568
  • Mfr. Part No. 3VA10204ED420AA0
Each
MYR2,005.98
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3817
  • Mfr. Part No. 1SDA071832R1
Each
MYR137,159.11
Bourns Thermal Fuse +77°C 50 A, 28V
  • RS Stock No. 258-6406
  • Mfr. Part No. SC77AAA
Each (In a Pack of 10)
MYR4.028
Bourns Surface Mount Fuse 4.5A, 65V dc
  • RS Stock No. 245-9264P
  • Mfr. Part No. SF-1206SA450M-2
Each (Supplied on a Reel)
MYR3.895
ABB 224A Tag Fuse, NH1, 500V
  • RS Stock No. 251-3478
  • Mfr. Part No. 1SCA022627R5710
1 Box of 3
MYR351.37
ABB Emax2 Electronic Circuit Breaker 250A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4469
  • Mfr. Part No. 1SDA072677R1
Each
MYR53,569.23
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4828
  • Mfr. Part No. 3VA2563-7JP32-0AA0
Each
MYR22,314.96
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3769
  • Mfr. Part No. 3VA2040-7HM46-0AA0
Each
MYR8,881.00
Eaton 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 233-0589
  • Mfr. Part No. BK2-HTC-623M
Each (In a Pack of 10)
MYR14.298
Schneider Electric Connection Unit for use with ComPact NS630b → 1600 Circuit Breaker, ComPact NS630b →
  • RS Stock No. 247-1866
  • Mfr. Part No. 33727
Each
MYR1,501.70
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 3A Curve D
  • RS Stock No. 216-4057
  • Mfr. Part No. 5SY4603-8
Each
MYR979.82
1
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