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

51000 Products showing for Fuses & Circuit Breakers

36 of 999+
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 25A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Each
£108.27(exc. VAT)
Bulgin 10A Inline Fuse Holder for 6.3 x 25mm Fuse, 250V ac
  • RS Stock No. 408-410
  • Mfr. Part No. FX0285
Each (In a Pack of 5)
£6.612(exc. VAT)
Eaton 32A British Standard Fuse, A2, 660V ac, 73mm
  • RS Stock No. 415-187
  • Mfr. Part No. TIA32M35
Each (In a Pack of 5)
£10.714(exc. VAT)
Limitor Thermal Fuse +97°C 2 A, 250V ac
  • RS Stock No. 116-114
  • Mfr. Part No. SM 092 A0 2A
Each (In a Pack of 5)
£1.056(exc. VAT)
Better World
Schneider Electric Linergy Busbar, 690V, 45mm Pitch
  • RS Stock No. 608-8220
  • Mfr. Part No. GV2G345
Each
£15.84(exc. VAT)
Mersen 32A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0596
  • Mfr. Part No. H1017205 / FR14GR69V32
Each
£13.07(exc. VAT)
ABB 18 Way No Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 225-5902
  • Mfr. Part No. 1SL1213A00
Each
£46.93(exc. VAT)
Schurter 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7781
  • Mfr. Part No. 0001.2507
Each (In a Bag of 10)
£0.56(exc. VAT)
Mersen 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6984
  • Mfr. Part No. S218194
1 Pack of 10
£13.85(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3521
  • Mfr. Part No. A9F55216
Each
£78.85(exc. VAT)
Better World
ABB System Pro M Compact S200M MCB, 2P, 2A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8169
  • Mfr. Part No. 2CDS272001R0021 S202M-D2
Each
£55.63(exc. VAT)
ABB Cover for use with Modular Circuit Breakers
  • RS Stock No. 534-8818
  • Mfr. Part No. 12422 M124220000
Each
£5.68(exc. VAT)
Eaton 16A British Standard Fuse, A2, 660V ac, 73mm
  • RS Stock No. 415-143
  • Mfr. Part No. TIA16
1 Pack of 5
£44.65(exc. VAT)
SIBA 12.5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3333
  • Mfr. Part No. 70-007-65/12.5A
Each (In a Pack of 10)
£0.493(exc. VAT)
Better World
ABB System Pro M Compact S200 MCB, 1P, 16A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 231-9671
  • Mfr. Part No. 2CDS251001R1165 S201 B 16A - 10 KA
1 Box of 1
£16.38(exc. VAT)
Littelfuse 5A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 876-8442
  • Mfr. Part No. KLDR005.TXP
Each
£38.60(exc. VAT)
Mersen 50A DIII Diazed Fuse, E33 Thread Size, gG, 500V
  • RS Stock No. 377-0516
  • Mfr. Part No. K214576
Each (In a Pack of 5)
£2.134(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 63A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3366
  • Mfr. Part No. A9F54263
Each
£96.23(exc. VAT)
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 125A Curve D
  • RS Stock No. 219-8302
  • Mfr. Part No. A9N18514
Each
£333.86(exc. VAT)
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 255-621
  • Mfr. Part No. 266633 NZM2-XHBR
Each
£119.90(exc. VAT)
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