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

2270 / 999+
Better World
Schneider Electric Compact Keylock Adapter for use with Compact Nsx 400/630
  • RS Stock No. 221-1275
  • Mfr. Part No. LV432649
Each
MYR461.86
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-4639
  • Mfr. Part No. 1SDA072912R1
Each
MYR40,423.02
Bourns Non Resettable Fuse 3.5A, 125V ac
  • RS Stock No. 191-4632
  • Mfr. Part No. SF-2410FP350T-2
Each (On a Tape of 10)
MYR2.881
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-8133
  • Mfr. Part No. C40R32D250
Each
MYR18,819.84
Better World
Siemens, SENTRON MCCB 4P 320A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3481
  • Mfr. Part No. 3VA1332-5FF42-0AA0
Each
MYR9,308.93
RS PRO 6A aR Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 199-246
1 Pack of 10
MYR1,116.50
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7948
  • Mfr. Part No. C25N44V100
Each
MYR17,832.67
Better World
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3290
  • Mfr. Part No. 1SDA071199R1
Each
MYR112,626.68
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4514
  • Mfr. Part No. 1SDA072734R1
Each
MYR21,236.44
Better World
Siemens, 0AA0 MCCB 4P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 211-5979
  • Mfr. Part No. 3VA1110-6EF42-0AA0
Each
MYR3,012.03
Eaton xEffect MCB, 3+N, 8A Curve D
  • RS Stock No. 230-1062
  • Mfr. Part No. 177480 FAZ6-D8/3N
Each
MYR413.47
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-3993
  • Mfr. Part No. 1SDA072053R1
Each
MYR17,984.07
Siemens SENTRON 5SP3740 MCB, 1P, 40A, Type E
  • RS Stock No. 231-8348
  • Mfr. Part No. 5SP3740-2KK03
Each
MYR677.43
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-4690
  • Mfr. Part No. 1SDA072966R1
Each
MYR46,184.41
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7660
  • Mfr. Part No. 5TT4464-2
Each
MYR932.16
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 63A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9376
  • Mfr. Part No. 3VA1163-3ED12-0AA0
Each
MYR772.81
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3938
  • Mfr. Part No. 3VA2110-0KQ42-0AA0
Each
MYR13,094.60
Schneider Electric, ComPacT MCCB 3P 16A, Fixed Mount
  • RS Stock No. 260-7642
  • Mfr. Part No. C11N3TM016B
Each
MYR3,071.25
ABB 100A Tag Fuse, 125 x 30 x 60mm, 500V
  • RS Stock No. 250-4411
  • Mfr. Part No. 1SCA022697R5790
1 Box of 3
MYR290.07
ABB Emax2 Electronic Circuit Breaker 2kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3704
  • Mfr. Part No. 1SDA071680R1
Each
MYR80,195.43
1
2270
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