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

326 / 999+
Temporarily out of stock
ABB SU200 M MCB, 3P, 500mA, Type Z, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-080
  • Mfr. Part No. 2CDS273337R0158
Each
MYR2,364.39
Temporarily out of stock
Hager HMC MCB, 4P, 125A, 400V AC, 15 Breaking Capacity
  • RS Stock No. 602-119
  • Mfr. Part No. HMC499
Each
MYR5,415.11
In Stock
Phoenix Contact CLIPLINE Electronic Circuit breaker 24A 24V PTCB E1, 1 channels , DIN Rail Mount Type E
  • RS Stock No. 220-5805
  • Mfr. Part No. 1135752
Each
MYR223.87
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 4 channels
  • RS Stock No. 157-229
  • Mfr. Part No. 3VA2163-8JP46-0AA0
Each
MYR11,357.21
In Stock
Hager NFN MCB, 2P, 16A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4713
  • Mfr. Part No. NFN216
Each
MYR469.31
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 6A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-1958
  • Mfr. Part No. 5SY4106-6
Each
MYR117.59
Temporarily out of stock
Better World
Siemens RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type AC, Sentron Range
  • RS Stock No. 196-3610
  • Mfr. Part No. 5SU13531KK16
Each
MYR1,067.25
In Stock
Schneider Electric Resi9 Distribution Board, 63 A
  • RS Stock No. 276-8946
  • Mfr. Part No. R9H13401
Each
MYR191.58
In Stock
Weidmüller 10A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 286-0183
  • Mfr. Part No. 2783230000
1 Box of 5
MYR272.84
In Stock
Better World
Schneider Electric Multi 9 MCB, 4P, 20A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9139
  • Mfr. Part No. M9F22420
Each
MYR1,078.26
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7807
  • Mfr. Part No. C16N3TM160
Each
MYR6,576.52
Temporarily out of stock
Better World
Siemens SENTRON 5SL60 MCB, 1P + N, 2A Curve C, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-537
  • Mfr. Part No. 5SL6002-7KL
Each
MYR412.27
Temporarily out of stock
Schurter SMD Non Resettable Fuse 1.6A, 32 V ac, 63V dc
  • RS Stock No. 665-7384P
  • Mfr. Part No. 3413.0218.22.
Each (Supplied on a Reel)
MYR2.831
In Stock
Schneider Electric, Wiser Energy PowerTag, 63A, Energy Sensor, 2VA, Wireless
  • RS Stock No. 276-8964
  • Mfr. Part No. R9M60
Each
MYR569.45
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3P, 1.6A Curve C, 415V AC, 100 kA Breaking Capacity
  • RS Stock No. 200-328
  • Mfr. Part No. 2CDS383001R0974
Each
MYR2,249.90
Temporarily out of stock
Eaton 100A Ceramic Cartridge Fuse, 30 x 57mm
  • RS Stock No. 182-1449
  • Mfr. Part No. 100LR85
Each (In a Box of 20)
MYR54.073
Temporarily out of stock
Hager BFF Series RCCB, 40A, 2 Pole, 300mA, Type F
  • RS Stock No. 597-979
  • Mfr. Part No. BFF240
Each
MYR2,140.62
In Stock
RS PRO 50A Bolted Tag Fuse, 120 V dc, 240V ac, 41.8mm
  • RS Stock No. 221-3641
Each (In a Pack of 5)
MYR45.98
Temporarily out of stock
Better World
ABB S200C MCB, 2P, 32A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1633
  • Mfr. Part No. 2CDS252280R0324
Each
MYR275.21
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 63A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3060
  • Mfr. Part No. A9N18364
Each
MYR1,408.43
1
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