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

233 / 999+
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 250mA, 250V ac
  • RS Stock No. 895-1650
  • Mfr. Part No. 37202500411
Each (In a Pack of 10)
MYR3.732
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4577
  • Mfr. Part No. 1SDA072827R1
Each
MYR55,291.22
Temporarily out of stock
Contactum 14 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9129
  • Mfr. Part No. DDS14188MS-P01
Each
MYR1,293.45
Temporarily out of stock
Siemens 4A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2022
  • Mfr. Part No. 3NW1040-0HG
Each (In a Pack of 10)
MYR111.949
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 20A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9153
  • Mfr. Part No. A9F77320
Each
MYR974.50
Temporarily out of stock
Rockwell Automation FB50 Busbar, 1000V
  • RS Stock No. 282-2362
  • Mfr. Part No. PE-FB50480Q1
Each (In a Pack of 4)
MYR252.445
Temporarily out of stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 2P, 600V ac
  • RS Stock No. 144-1799
  • Mfr. Part No. 0031.9161
Each (In a Box of 25)
MYR76.234
In Stock
Eaton 110 V dc, 250V ac Auxiliary Release Shunt trip for use with FAZ Series MCB/RCBO
  • RS Stock No. 922-6958
  • Mfr. Part No. 262414 FAZ-XAM002
Each
MYR265.81
Temporarily out of stock
Lovato P1RA RCCB, 40A, 4 Pole, 30mA, Type A, 230 V ac, 400 V ac
  • RS Stock No. 188-1682
  • Mfr. Part No. P1RA4P40A030
Each
MYR1,385.63
Temporarily out of stock
Siemens SENTRON Connection Unit for use with 3VA1 400/630 3VA2 400/630
  • RS Stock No. 269-7209
  • Mfr. Part No. 3VA9483-0QD00
Each (In a Pack of 3)
MYR230.53
In Stock
ABB RCBO, 63A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 231-9959
  • Mfr. Part No. 2CSR272001R1634 DS202 M AC-C63/0,03
Each
MYR1,282.70
Temporarily out of stock
Schneider Electric MASTERPACT NW MCB, 3P, 2.5kA
  • RS Stock No. 247-1895
  • Mfr. Part No. 48300
Each
MYR91,452.93
Temporarily out of stock
ABB F200 RCCB, 63A, 4 Pole, 100mA, Type AC, 230V ac
  • RS Stock No. 225-6120
  • Mfr. Part No. 2CSF204001R2630 F204 AC-63/0,1
Each
MYR976.55
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4494
  • Mfr. Part No. 1SDA072704R1
Each
MYR31,950.37
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 4P 630A, DIN Rail Mount
  • RS Stock No. 224-7919
  • Mfr. Part No. 3VA2463-5HL42-0AA0
Each
MYR15,008.44
In Stock
Eaton 2A Bolted Tag Fuse, A2, 550V ac, 73mm
  • RS Stock No. 181-8864
  • Mfr. Part No. AAO2
Each
MYR22.45
Temporarily out of stock
Better World
Schneider Electric, Masterpact MCCB 4P 1.6kA, Fixed Mount
  • RS Stock No. 248-3769
  • Mfr. Part No. LV847245
Each
MYR46,893.80
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1709
  • Mfr. Part No. 3VA2063-5KP36-0AA0
Each
MYR5,882.05
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 10A Curve K, 15 kA Breaking Capacity
  • RS Stock No. 219-9299
  • Mfr. Part No. A9F95210
Each
MYR1,232.80
Temporarily out of stock
Schneider Electric ComPacT NSX400...630 Vigi add-on for use with Wiring
  • RS Stock No. 119-201
  • Mfr. Part No. LV432466
Each
MYR13,049.04
1
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