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

46580 Products showing for Fuses & Circuit Breakers

24 / 999+
Eaton MEMShield MCB, 1P, 40A Curve C, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3039
  • Mfr. Part No. EMCH140 EMCH140
Each
MYR167.19
RS PRO 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-738
Each (In a Pack of 10)
MYR2.584
Mersen 10A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2740
  • Mfr. Part No. E222207
1 Box of 10
MYR210.43
Littelfuse SMD Non Resettable Fuse 375mA, 125V ac/dc
  • RS Stock No. 541-3344
  • Mfr. Part No. 0451.375MRL
Each (In a Pack of 10)
MYR6.648
Eaton 6A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 414-617
  • Mfr. Part No. NIT6
Each (In a Pack of 5)
MYR43.716
Mersen 16A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2782
  • Mfr. Part No. H201809
1 Box of 10
MYR210.43
Better World
ABB System Pro M Compact S200 MCB, 1P, 16A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 225-5988
  • Mfr. Part No. 2CDS251001R0164 S201 C 16A - 6 KA
Each
MYR125.16
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690V ac
  • RS Stock No. 189-5335
  • Mfr. Part No. H1062699 / CMC102
Each
MYR94.02
Siemens 63A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-067
  • Mfr. Part No. 3NA3822
Each (In a Pack of 3)
MYR160.47
ABB System Pro M Compact S200 MCB, 1P, 100A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 231-9669
  • Mfr. Part No. 2CDS251001R0824 S201-C100 6kA
1 Box of 1
MYR366.07
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 125A Curve C, 440V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 219-8297
  • Mfr. Part No. A9N18459
Each
MYR1,713.90
RS PRO 4A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4190
Each (In a Pack of 5)
MYR20.072
SIBA 500A White Automotive Car Fuse, 80V dc
  • RS Stock No. 161-1839
  • Mfr. Part No. 9005805.500
Each
MYR43.39
Schurter PC Board Non Resettable Fuse 2.5A, 125V ac/dc
  • RS Stock No. 865-7834
  • Mfr. Part No. 0034.4225
Each (In a Pack of 10)
MYR9.301
ABB System Pro M Compact S200 M UC MCB, 1P, 16A Curve C, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-311
  • Mfr. Part No. 2CDS271061R0164
Each
MYR550.93
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2059
  • Mfr. Part No. 3120-N32V-H7T1-SGRX-10A-U0000M
Each
MYR343.66
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 20A Curve C, 100 → 130V AC, 12 → 144V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9318
  • Mfr. Part No. A9F94220
Each
MYR1,042.41
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 6A Curve C, 230V AC
  • RS Stock No. 238-3410
  • Mfr. Part No. A9P71606
Each
MYR194.38
Better World
Siemens Sentron 5SY6 MCB, 2P, 3A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3626
  • Mfr. Part No. 5SY6203-7
Each
MYR354.79
Mersen 6.3A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-849
  • Mfr. Part No. A090551Q
1 Box of 10
MYR34.15
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