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

46578 Products showing for Fuses & Circuit Breakers

2239 / 999+
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 221-5644
  • Mfr. Part No. 3-128-327
Each
MYR76.59
Eaton 32A Bolted Tag Fuse, F1, 440V ac
  • RS Stock No. 181-8485
  • Mfr. Part No. NS32BS
1 Box of 20
MYR1,013.08
Siemens SENTRON 5SP3740 MCB, 1P, 40A, Type E
  • RS Stock No. 231-8349
  • Mfr. Part No. 5SP3740-3
Each
MYR839.16
Eaton 224A Centred Tag Fuse, NH02, 500V ac
  • RS Stock No. 182-1539
  • Mfr. Part No. 224NHG02B
Each (In a Box of 3)
MYR48.57
Better World
ABB, Tmax XT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 236-6505
  • Mfr. Part No. 1SDA067962R1 XT2L 160 Ekip LSI 100A FF
Each
MYR8,492.01
Schneider Electric, ComPacT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-8002
  • Mfr. Part No. C25V35E160
Each
MYR18,745.48
Better World
Schneider Electric Linergy Mounting Plate for use with AK5 Series
  • RS Stock No. 211-2276
  • Mfr. Part No. AK5PC12PH
Each (In a Pack of 6)
MYR120.887
RS PRO 125A Bolted Tag Fuse, 120 V dc, 240V ac, 59mm
  • RS Stock No. 221-3634
1 Bag of 10
MYR906.62
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 221-5614
  • Mfr. Part No. 3-128-219
Each
MYR79.72
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3313
  • Mfr. Part No. 1SDA071221R1
Each
MYR131,304.78
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3953
  • Mfr. Part No. 1SDA071997R1
Each
MYR267,348.90
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4627
  • Mfr. Part No. 3VA2140-6HM32-0AA0
Each
MYR5,864.48
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4047
  • Mfr. Part No. 3VA2110-8KQ42-0AA0
Each
MYR12,001.65
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3946
  • Mfr. Part No. 1SDA071990R1
Each
MYR231,107.49
Better World
Siemens SENTRON 3VA1 MCB, 1P, 40A
  • RS Stock No. 224-7851
  • Mfr. Part No. 3VA1140-4ED16-0AA0
Each
MYR892.77
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4106
  • Mfr. Part No. 1SDA072213R1
Each
MYR24,680.16
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 55 kA
  • RS Stock No. 209-6757
  • Mfr. Part No. 3VA1112-5EE36-0AA0
Each
MYR3,953.02
Phoenix Contact Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 8A Current Rating
  • RS Stock No. 217-6362
  • Mfr. Part No. 2800864
Each
MYR235.69
ABB Tmax T Sliding Contacts for use with Circuit Breaker
  • RS Stock No. 231-9289
  • Mfr. Part No. 1SDA062169R1 T7-M-X1
1 Box of 1
MYR681.39
Lovato MCB, MCB
  • RS Stock No. 188-1676
  • Mfr. Part No. ULC256A18A
Each
MYR989.69
1
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