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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

217 / 999+
In Stock
ABB RCBO, 32A Current Rating, 3P Poles, Type B
  • RS Stock No. 237-5069
  • Mfr. Part No. 2CSR253001R1325
Each
MYR1,714.15
Temporarily out of stock
Schneider Electric Acti9 A9F MCB, 4P, 10A, 440V AC, 250V DC, 10000 A Breaking Capacity
  • RS Stock No. 276-8727
  • Mfr. Part No. A9F87410
Each
MYR1,644.95
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1kA , 4 channels , Withdrawable
  • RS Stock No. 132-732
  • Mfr. Part No. 183788 IZMX40N4-P10W-1
Each
MYR73,921.45
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LI, 4 channels
  • RS Stock No. 259-3438
  • Mfr. Part No. 1SDA071381R1
Each
MYR29,176.10
Temporarily out of stock
Hager 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P, 690V ac
  • RS Stock No. 144-4547
  • Mfr. Part No. LS704
Each
MYR874.55
Temporarily out of stock
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-360
  • Mfr. Part No. Mi 1335
Each
MYR1,989.39
Temporarily out of stock
Siemens 315A Tag Fuse, NH3mm, 1.5kV, 210mm
  • RS Stock No. 626-998
  • Mfr. Part No. 3NE5430-0C
1 Pack of 2
MYR3,376.26
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 32A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 776-3534
  • Mfr. Part No. A9F77632
Each
MYR594.44
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 157-090
  • Mfr. Part No. 3VA2116-5HM42-0AA0
Each
MYR9,835.66
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 160A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-8214
  • Mfr. Part No. LV426359
Each
MYR3,106.94
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8219
  • Mfr. Part No. C63L3
Each
MYR20,389.86
In Stock
ABB SMISSLINE TP S400M MCB, 3P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 176-661
  • Mfr. Part No. 2CCS573001R0164 S403M-C16
Each
MYR656.77
In Stock
Mersen 50A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0613
  • Mfr. Part No. K1017207 / FR14GR69V50
Each
MYR103.68
In Stock
Eaton 500mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-447
  • Mfr. Part No. TDC11-500MA
Each (In a Pack of 10)
MYR7.831
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4344
  • Mfr. Part No. 1SDA072512R1
Each
MYR90,417.24
In Stock
Bourns SMD Non Resettable Fuse 35A, 250V ac
  • RS Stock No. 186-0324
  • Mfr. Part No. SF-3812F3500T-2
Each (On a Tape of 10)
MYR19.681
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit, Canalis Series
  • RS Stock No. 211-0397
  • Mfr. Part No. KBC16DCB216
Each (In a Pack of 10)
MYR202.267
Temporarily out of stock
Better World
Schneider Electric Busbar Trunking Jointing Device, 630A, Canalis KS Series
  • RS Stock No. 211-0485
  • Mfr. Part No. KSA630ZJ4
Each
MYR4,540.32
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 10A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1307
  • Mfr. Part No. 5SY4210-8
Each
MYR408.80
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 3m, 40A, KBB Series
  • RS Stock No. 219-8868
  • Mfr. Part No. KBB40ED44305W
Each
MYR1,363.93
1
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