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

63 / 999+
In Stock
Better World
Schneider Electric iC60 RCD, 25A, 30mA
  • RS Stock No. 776-2916
  • Mfr. Part No. A9Q31425
Each
MYR2,408.42
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 55 kA
  • RS Stock No. 209-6884
  • Mfr. Part No. 3VA1340-5EF32-0AA0
Each
MYR6,650.95
In Stock
ABB FH200 RCCB, 40A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 186-3459
  • Mfr. Part No. 2CSF202102R1400
Each
MYR502.57
Temporarily out of stock
Eaton 800mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9438
  • Mfr. Part No. S501-800-R
1 Bag of 1000
MYR1,401.40
In Stock
Littelfuse 3A F Glass Cartridge Fuse, 5 x 15mm
  • RS Stock No. 878-3573
  • Mfr. Part No. 0225003.HXP
Each (In a Pack of 50)
MYR2.401
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7772
  • Mfr. Part No. 2CDS253001R0324 S203-C32
Each
MYR401.51
In Stock
Eaton PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 769-3340
  • Mfr. Part No. SS-5-3-15A-BK
Each (In a Pack of 5)
MYR4.582
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC 2 Pole 65V dc Voltage Rating DIN Rail, 5A Current Rating
  • RS Stock No. 135-506
  • Mfr. Part No. 0914853
1 Pack of 3
MYR2,463.86
Temporarily out of stock
ABB RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 136-7788
  • Mfr. Part No. 2CSR275151R1254 DSE201 M C25 A30 - N Blue
Each
MYR679.24
In Stock
Eaton 315mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-8651
  • Mfr. Part No. S506-315-R
Each (In a Pack of 10)
MYR1.944
In Stock
Eaton 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9403
  • Mfr. Part No. S500-1.25-R
1 Bag of 1000
MYR1,035.50
In Stock
Eaton 10A DI Bottle Fuse, E16 Thread Size, gG, 500V ac
  • RS Stock No. 181-8657
  • Mfr. Part No. 10D16
Each
MYR23.83
In Stock
Eaton xEffect MCB, 3P, 40A Curve D, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 847-3620
  • Mfr. Part No. 278900 FAZ-D40/3
Each
MYR656.73
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0513
  • Mfr. Part No. KSB63SM48
Each
MYR653.43
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 4P, 10A Curve C
  • RS Stock No. 247-1951
  • Mfr. Part No. A9F94410
Each
MYR422.71
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS Stock No. 246-5128
  • Mfr. Part No. 3RV1915-1AB
Each
MYR51.27
In Stock
Mersen 4A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2737
  • Mfr. Part No. E217170
1 Box of 10
MYR210.43
Temporarily out of stock
Schneider Electric Surge Arrester, 100kA, DIN Rail Mount
  • RS Stock No. 247-1639
  • Mfr. Part No. 16332
Each
MYR20,342.04
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA
  • RS Stock No. 209-6976
  • Mfr. Part No. 3VA1116-5EF32-0AA0
Each
MYR4,528.06
In Stock
ABB High Performance S800N MCB, 3P, 100A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-396
  • Mfr. Part No. 2CCG001233R0001
Each
MYR1,826.33
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