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

50973 Products showing for Fuses & Circuit Breakers

57 of 999+
Allen Bradley 1492 1492-SPM MCB, 3P, 4A Curve D, 277V AC, 10 kA Breaking Capacity
  • RS Stock No. 125-1522
  • Mfr. Part No. 1492-SPM3D040
Each
£69.65
Mersen 6.3A 5SF Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 816-8927
  • Mfr. Part No. V090523
Each (In a Pack of 10)
£0.462
Mersen 10A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4409
  • Mfr. Part No. ATMR10
Each
£18.07
Allen Bradley 1492 1492-SPM MCB, 3P, 2A Curve C, 277V AC, 10 kA Breaking Capacity
  • RS Stock No. 125-1480
  • Mfr. Part No. 1492-SPM3C020
Each
£63.61
Eaton 20A Rail Mount Fuse Holder, 1P, 690V ac
  • RS Stock No. 182-1764
  • Mfr. Part No. RS20P-GGN
Each
£34.26
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P+N, 690V ac
  • RS Stock No. 182-0347
  • Mfr. Part No. H215655
Each
£13.60
Eaton xEffect MCB, 2P, 4A Curve C, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 847-3361
  • Mfr. Part No. 278752 FAZ-C4/2
Each
£71.24
Littelfuse 1.5A Resettable Fuse, 33V dc
  • RS Stock No. 867-5343
  • Mfr. Part No. SMD150F/33-2
Each (In a Bag of 10)
£0.535
RS PRO 1.6A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-151
Each (In a Pack of 10)
£2.61
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 769-0170
  • Mfr. Part No. 03453LF1H
Each
£4.53
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 40A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2377
  • Mfr. Part No. M9F22340
Each
£131.78
Mersen 16A DII Diazed Fuse, E27 Thread Size, gG, 500V
  • RS Stock No. 377-0471
  • Mfr. Part No. K201765
Each (In a Pack of 5)
£1.158
Europa EUR1 RCCB, 40A, 4 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 210-4753
  • Mfr. Part No. EUR140.30/4A
Each
£65.43
Schurter 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-8092
  • Mfr. Part No. 0034.3122
1 Pack of 10
£4.00
Eaton 10A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 413-298
  • Mfr. Part No. NITD10
Each (In a Pack of 5)
£3.946
Schurter PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 284-5300
  • Mfr. Part No. 0034.6612
Each (In a Pack of 10)
£0.358
Phoenix Contact 1 Phase Surge Protector, 1.8kV, DIN Rail Mount
  • RS Stock No. 890-3727
  • Mfr. Part No. 2905466
Each
£493.40
ABB System Pro M Compact S200M MCB, 1P, 63A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4217
  • Mfr. Part No. 2CDS271001R0634 S201M-C63
Each
£21.27
Lovato ModuLo P1MB MCB, 2P, 63A Curve B, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5693
  • Mfr. Part No. P1MB2PB63
Each
£48.40
Eaton 10A Bottle Fuse, 500V
  • RS Stock No. 229-229
  • Mfr. Part No. 10D27
1 Pack of 5
£4.37
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Distribution Boards Guide
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MCBs Guide
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