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

163 / 999+
Bourns 0.25A Resettable Fuse, 60V
  • RS Stock No. 647-8443P
  • Mfr. Part No. MF-R025
Each (Supplied in a Bag)
MYR2.198
Schneider Electric Surge Arrester, 20kA, 350V ac, Plug In Mount
  • RS Stock No. 288-7104
  • Mfr. Part No. A9L16082
Each
MYR1,786.98
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 20A Curve C, 400V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9172
  • Mfr. Part No. A9F77420
Each
MYR1,236.71
Mersen 1.25A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-882
  • Mfr. Part No. S090544Q
1 Box of 10
MYR36.46
Schneider Electric ComPacT Cover for use with ComPacT
  • RS Stock No. 357-658
  • Mfr. Part No. C47067
Each
MYR78.44
Littelfuse 6.25A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0114
  • Mfr. Part No. 03136.25HXP
Each (In a Pack of 5)
MYR5.326
Siemens SENTRON Withdrawable Unit for use with Circuit Breaker
  • RS Stock No. 157-801
  • Mfr. Part No. 3VA9124-0KD00
Each
MYR3,454.62
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 36 kA
  • RS Stock No. 209-6999
  • Mfr. Part No. 3VA1150-4EF42-0AA0
Each
MYR2,303.22
Schneider Electric Multi9 M9F1 MCB, 1P, 10A Curve B, 415V AC, 72V DC, 3 kA Breaking Capacity
  • RS Stock No. 212-122
  • Mfr. Part No. M9F10110
Each
MYR101.54
Siemens SENTRON 4 Phase Busbar, 18mm Pitch
  • RS Stock No. 226-0817
  • Mfr. Part No. 5ST3651
Each (In a Pack of 10)
MYR89.611
Mersen Surge Protector, 50kA, 1800V (Volts), DIN Rail Mount
  • RS Stock No. 361-612
  • Mfr. Part No. 44020404
Each
MYR738.67
Schneider Electric Acti9 Acti9 C120 MCB, 2P, 125A, Type AC, 500V AC, 300 mA Breaking Capacity
  • RS Stock No. 341-111
  • Mfr. Part No. A9N18564
Each
MYR3,646.37
Allen Bradley 140G Shunt Trip Voltage Release for use with Circuit Breaker
  • RS Stock No. 255-1644
  • Mfr. Part No. 140G-G-SNA
Each
MYR822.70
Siemens SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 263-638
  • Mfr. Part No. 3VA9243-0JF60
1 Kit
MYR896.25
Eaton 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 233-0586
  • Mfr. Part No. BK2-HTC-609M
1 Box of 2000
MYR31,462.20
RS PRO 10 A Panel Mount Fuse Holder, 1P for 5 x 20 mm, 250 V
  • RS Stock No. 277-3922
Each (In a Pack of 5)
MYR16.60
Eaton xEffect FAZ MCB, 3P, 3A Curve D, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 241-227
  • Mfr. Part No. 102301 FAZ-D3/3-RT
Each
MYR1,385.11
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 201-489
  • Mfr. Part No. 1STQ007411A0000
Each
MYR5,591.22
Hager Hager NRN Circuit Breaker, 4P, 6A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-709
  • Mfr. Part No. NRN406
Each
MYR1,808.22
Better World
ABB System Pro M Compact S200M MCB, 2P, 10A Curve K
  • RS Stock No. 231-9728
  • Mfr. Part No. 2CDS272001R0427 S202M K 10A - 15 KA
1 Box of 1
MYR407.58
1
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