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

283 / 999+
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 200mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-659
  • Mfr. Part No. 3RV2811-0BD10
Each
MYR1,078.60
In Stock
Littelfuse 1.1A Resettable Fuse, 33V dc
  • RS Stock No. 787-4205P
  • Mfr. Part No. 2920L100PR
Each (Supplied on a Reel)
MYR2.716
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4100
  • Mfr. Part No. 1SDA072194R1
Each
MYR28,315.23
In Stock
Littelfuse 2.5A Resettable Fuse, 30V dc
  • RS Stock No. 517-6815P
  • Mfr. Part No. RUEF250
Each (Supplied in a Bag)
MYR1.663
Temporarily out of stock
ABB S800PV MCB, 3P, 50A Curve B, 1200V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5935
  • Mfr. Part No. 2CCF019617R0001 S803PV-SP50 - 5 kA
Each
MYR1,929.13
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 2A Curve B
  • RS Stock No. 237-3193
  • Mfr. Part No. 2CDS251103R0025
Each
MYR299.94
In Stock
RS PRO 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8097
Each (In a Pack of 5)
MYR9.076
In Stock
Littelfuse Inline Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 787-4340
  • Mfr. Part No. 178.6152.0001
Each
MYR17.66
In Stock
Phoenix Contact Surge Protector, ≤1.5kV, DIN Rail Mount
  • RS Stock No. 890-3746
  • Mfr. Part No. 2906101
Each
MYR271.92
In Stock
Littelfuse 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3530
  • Mfr. Part No. 021906.3MXAP
Each (In a Pack of 10)
MYR3.892
In Stock
Better World
Schneider Electric Acti 9 A9F9 MCB, 2P, 32A, Type Z, 400V AC, 125V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 211-2491
  • Mfr. Part No. A9F92232
Each
MYR797.31
In Stock
SIBA 160A NH Fuse, NH00, 690V
  • RS Stock No. 893-8562
  • Mfr. Part No. 20-209-08/160A
Each (In a Pack of 3)
MYR112.473
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 200A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-716
  • Mfr. Part No. IL2003P36
Each
MYR5,856.94
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5162
  • Mfr. Part No. 3VA2140-6HN32-0AA0
Each
MYR4,490.24
Temporarily out of stock
Schneider Electric, PowerPact MCCB 2P 80A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 341-139
  • Mfr. Part No. BJF26080
Each
MYR4,934.95
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 100/160 Circuit Breakers
  • RS Stock No. 260-9380
  • Mfr. Part No. C104MG025
Each
MYR1,224.92
Temporarily out of stock
Bourns 200A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4150
  • Mfr. Part No. PF-FB2-300
Each (In a Box of 10)
MYR714.803
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 63A Curve C, 400V AC, 12 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9309
  • Mfr. Part No. A9F87463
Each
MYR3,672.39
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 6.3A, 250V ac
  • RS Stock No. 767-5068
Each (In a Pack of 10)
MYR1.801
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
1
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