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

329 / 999+
Temporarily out of stock
Siemens SENTRON 5SL66 MCB, 4P, 40A Curve B, 440V AC, 62.5V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-411
  • Mfr. Part No. 5SL6640-6
Each
MYR836.50
In Stock
Siemens 40A Centred Tag Fuse, NH00, 690V
  • RS Stock No. 210-6913
  • Mfr. Part No. 3NA6817-6
Each (In a Pack of 3)
MYR248.613
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator
  • RS Stock No. 219-8902
  • Mfr. Part No. KNB50SN4
Each
MYR1,837.85
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 16A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 539-8223
  • Mfr. Part No. 2CDS211001R0164 SH201-C16
Each
MYR83.66
In Stock
Better World
Schneider Electric 40A Cartridge Fuse, 22 x 58mm
  • RS Stock No. 219-9075
  • Mfr. Part No. DF2FA40
Each (In a Pack of 10)
MYR103.475
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-902
  • Mfr. Part No. 3VA5215-5EC41-2AA0
Each
MYR9,536.29
Temporarily out of stock
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-642
  • Mfr. Part No. BE 44
Each
MYR152.45
In Stock
Better World
Schneider Electric Cable Connector for use with INS100...250, INV100...250, NSX100, NSX160, NSX250
  • RS Stock No. 248-4110
  • Mfr. Part No. LV429245
Each
MYR526.98
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 156-646
  • Mfr. Part No. 3VA2216-5JP42-0AA0
Each
MYR14,780.66
In Stock
Mersen 35A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 377-0285
  • Mfr. Part No. R219826
Each (In a Pack of 5)
MYR13.828
In Stock
Littelfuse 100A Blue BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6747
  • Mfr. Part No. 153.5631.6101
Each (In a Pack of 5)
MYR17.088
Temporarily out of stock
Hager Electronic Circuit Breaker 20A MFS, 1 channels
  • RS Stock No. 251-2069
  • Mfr. Part No. MFS720
Each (In a Pack of 12)
MYR124.869
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 1A Curve B, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2326
  • Mfr. Part No. M9F21101
Each
MYR91.80
In Stock
Eaton 25A D02 Bottle Fuse, 400V
  • RS Stock No. 228-736
  • Mfr. Part No. 25NZ02 FUSE-D02 25A T GL/GG 400VAC E18
1 Pack of 10
MYR75.50
In Stock
Better World
Schneider Electric Acti9 iDT40 RCCB, 40A, 3 Pole, 300mA, Type AC, 400V ac
  • RS Stock No. 238-3504
  • Mfr. Part No. A9Y63340
Each
MYR1,635.76
In Stock
Schurter 16A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 737-8237
  • Mfr. Part No. 3101.0040
Each (In a Bag of 5)
MYR18.288
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 4P, 32A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8896
  • Mfr. Part No. 5SY6432-7
Each
MYR857.13
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 10A Curve K
  • RS Stock No. 237-3290
  • Mfr. Part No. 2CDS253103R0427
Each
MYR750.37
In Stock
ABB F200 RCCB, 25A, 4 Pole, 30mA, Type A, 230/400V ac
  • RS Stock No. 177-5056
  • Mfr. Part No. 2CSF204401R1250 F204 A-25/0,03 AP-R
Each
MYR954.67
In Stock
Mersen 50A British Standard Fuse, 17 x 49mm, 690V, 61 → 65.5mm
  • RS Stock No. 238-4013
  • Mfr. Part No. E220965
Each
MYR312.74
1
329
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