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

46579 Products showing for Fuses & Circuit Breakers

98 / 999+
In Stock
Littelfuse 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4533
  • Mfr. Part No. 0218010.MXP
Each (In a Pack of 10)
MYR6.457
In Stock
Eaton 8A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4181
  • Mfr. Part No. LP-CC-8
Each
MYR274.38
Temporarily out of stock
Schurter 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 866-4747
  • Mfr. Part No. 0031.3753
Each (In a Pack of 100)
MYR20.265
Temporarily out of stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 1P, 2A Curve D, 277V AC
  • RS Stock No. 256-6785
  • Mfr. Part No. M9F43102
Each
MYR530.95
In Stock
Eaton 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 600V
  • RS Stock No. 225-8213
  • Mfr. Part No. BK-HVI-R
Each
MYR258.89
In Stock
Littelfuse 63mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4252
  • Mfr. Part No. 0217.063MXP
Each (In a Pack of 10)
MYR6.801
In Stock
Mersen 15A Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 715-8991
  • Mfr. Part No. DCT15-2
Each
MYR145.76
In Stock
Socomec 32A Neutral Link for Cylindrical Fuses, 10mm x 38mm
  • RS Stock No. 122-5270
  • Mfr. Part No. 60190000
Each (In a Pack of 10)
MYR4.855
Temporarily out of stock
Better World
Schneider Electric Acti 9 A9F9 MCB, 4P, 16A Curve B, 400V AC, 250V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 211-2500
  • Mfr. Part No. A9F93416
Each
MYR2,347.73
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 1A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 746-8166
  • Mfr. Part No. 2CDS272001R0011 S202M-D1
Each
MYR422.41
In Stock
RS PRO MCB, 1P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0197
Each
MYR25.39
In Stock
Mersen 50A FF Cartridge Fuse, 22 x 58mm
  • RS Stock No. 136-0564
  • Mfr. Part No. C1018557 / FR22GR69V50
Each
MYR109.12
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 16A Curve B, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2333
  • Mfr. Part No. M9F21116
Each
MYR55.37
In Stock
Schneider Electric Multi 9 MCB, 1P, 4A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9174
  • Mfr. Part No. M9U21104
Each
MYR721.28
In Stock
Europa EUC1P EUB MCB, 1P, 63A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6484
  • Mfr. Part No. EUC1P63B
Each
MYR35.79
In Stock
RS PRO Residential RCCBs, 25A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 284-2372
Each
MYR334.73
Temporarily out of stock
ABB F200 RCCB, 125A, 4 Pole, 300mA, Type B, 400V ac
  • RS Stock No. 176-9628
  • Mfr. Part No. F204B-125/0.3
Each
MYR29,508.14
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS Stock No. 866-5513
  • Mfr. Part No. 3RV1915-1BB
Each
MYR71.91
In Stock
Eaton xEffect FAZ MCB, 1P, 5A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 258-992
  • Mfr. Part No. 278528 FAZ-B5/1
Each
MYR160.63
Temporarily out of stock
RS PRO HBC Fuse Kit
  • RS Stock No. 267-1856
1 Kit
MYR821.56
1
98
2329
Results per page

Related links