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

226 / 999+
Better World
ABB System Pro M Compact S200 MCB, 3P, 16A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7598
  • Mfr. Part No. 2CDS253001R0165 S203-B16
Each
MYR402.28
Lovato P1RD Residual Current Circuit Breaker, 25A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 277-5038
  • Mfr. Part No. P1RD2P25AC030
Each
MYR513.13
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 30A, Breaking Capacity 65 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-338
  • Mfr. Part No. 3VA5130-6ED21-0AA0
Each
MYR1,868.98
Mersen 10A British Standard Fuse, 17 x 27mm, 250V ac, 38 → 42.8mm
  • RS Stock No. 304-2669
  • Mfr. Part No. N076648
Each
MYR137.33
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-162
  • Mfr. Part No. 3VA6580-7HL42-0AA0
Each
MYR39,380.55
SIBA 2A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3355
  • Mfr. Part No. 70-059-60/2A
Each (In a Pack of 10)
MYR3.533
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3320
  • Mfr. Part No. 1SDA071228R1
Each
MYR151,469.93
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 346-739
  • Mfr. Part No. C100L450FM
Each
MYR83,891.22
Better World
Schneider Electric
  • RS Stock No. 125-1382
  • Mfr. Part No. A9C70114
Each
MYR1,786.32
Eaton IZMX/INX Electronic Circuit Breaker 1.25kA , Fixed
  • RS Stock No. 127-700
  • Mfr. Part No. 183334 IZMX16N3-V12F-1
Each
MYR31,162.44
Eaton xEffect MCB, 2P, 20A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3544
  • Mfr. Part No. 278784 FAZ-D20/2
Each
MYR465.92
Hinode Electric Co Ltd 16A Bolted Tag Fuse, 660 V ac, 450V dc, 62.7mm
  • RS Stock No. 103-4240
  • Mfr. Part No. 660GH-016
Each (In a Pack of 5)
MYR80.706
Eaton RCD, 25A, 2 Pole, 30mA, Type G
  • RS Stock No. 922-8682
  • Mfr. Part No. 235449 PFIM-25/2/003-G-MW
Each
MYR581.28
ABB SU200 M MCB, 2P, 3A Curve C, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-614
  • Mfr. Part No. 2CDS272337R0034
Each
MYR1,351.62
Phoenix Contact EC-E4 Electronic Circuit Breaker 4A 24V EC-E, 1 channels , DIN Rail
  • RS Stock No. 131-327
  • Mfr. Part No. 0903035
Each (In a Pack of 6)
MYR339.747
Selco Thermal Fuse +152°C 10 A, 250V ac
  • RS Stock No. 111-7808
  • Mfr. Part No. SWTC-306-3535
Each (In a Pack of 10)
MYR9.76
Eaton 100A Bolted Tag Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS Stock No. 182-1567
  • Mfr. Part No. 100FE
Each
MYR127.84
ABB F200 RCCB, 40A, 2 Pole, 30mA, 230V ac
  • RS Stock No. 176-9633
  • Mfr. Part No. F202F-40/0.03
Each
MYR3,106.83
Siemens SENTRON 5SM2xxx RCCB, 63A, 4 Pole, 300mA, Type A, 400V ac
  • RS Stock No. 241-4433
  • Mfr. Part No. 5SM2645-8
Each
MYR1,421.56
Eaton 6A Slow-Blow Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-926
  • Mfr. Part No. C22M6
1 Pack of 10
MYR205.17
1
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