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

148 / 999+
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 10A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6088
  • Mfr. Part No. A9P22610
Each
MYR212.15
In Stock
RS PRO 20A Slow-Blow Ceramic Cartridge Fuse, 6.35 x 32mm
  • RS Stock No. 180-075
1 Pack of 10
MYR118.01
Temporarily out of stock
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8065
1 Box of 1000
MYR676.82
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 8A, 250V ac
  • RS Stock No. 767-5077
Each (In a Pack of 10)
MYR3.381
Temporarily out of stock
Allen Bradley, 140G MCCB 3P 125A, Module Frame Mount
  • RS Stock No. 261-2883
  • Mfr. Part No. 140G-H2C3-C30
Each
MYR1,513.52
Temporarily out of stock
Eaton 400A Rail Mount Fuse Holder for NH2 Fuse, 1P, 690V ac
  • RS Stock No. 182-1787
  • Mfr. Part No. SD2-D-PV
Each
MYR375.30
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1290
  • Mfr. Part No. 5SY4206-8
Each
MYR494.10
In Stock
SIBA 50A NH Fuse, NH000, 500V ac
  • RS Stock No. 421-693
  • Mfr. Part No. 20-000-13/50E1
Each (In a Pack of 3)
MYR50.113
In Stock
RS PRO 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3506
Each (In a Pack of 10)
MYR1.982
Temporarily out of stock
Siemens SIVACON S4 Busbar
  • RS Stock No. 627-439
  • Mfr. Part No. 8PQ6000-6BA75
Each
MYR2,150.03
In Stock
ABB, Tmax XT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 236-7283
  • Mfr. Part No. 1SDA067415R1 XT1N 160 TMD 80A FF
Each
MYR1,567.66
In Stock
RS PRO 16A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 413-822
Each (In a Pack of 10)
MYR25.331
In Stock
Mersen 40A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7482
  • Mfr. Part No. N213613
Each (In a Pack of 10)
MYR26.746
Being discontinued
Mersen 630mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3090
  • Mfr. Part No. P090541
Each (In a Box of 10)
MYR2.858
In Stock
Littelfuse 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0079
  • Mfr. Part No. 0314010.HXP
Each (In a Pack of 10)
MYR4.912
Temporarily out of stock
ABB System Pro M Compact SU200M MCB, 3P, 20A Curve C, 400V AC, 400V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9759
  • Mfr. Part No. 2CDS273337R0204 SU203M-C20
1 Box of 1
MYR1,003.76
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 10A Single Pole 65 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 801-6915
  • Mfr. Part No. 0712314
Each
MYR85.07
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-407
  • Mfr. Part No. KV 6109
Each
MYR265.58
In Stock
Eaton xEffect MCB, 3P, 32A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4652
  • Mfr. Part No. 239151 FAZ6-C32/3
Each
MYR549.06
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7886
  • Mfr. Part No. C25F3MA150
Each
MYR6,622.95
1
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