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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

53 / 999+
Better World
Schneider Electric Acti 9 Adapter for use with iC60 MCB, iC60 Rotary Handle, iDPN Vigi, ilD MCB, iSW-NA
  • RS Stock No. 791-3035
  • Mfr. Part No. A9A27008
Each
MYR301.45
Eaton 500mA F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3898
  • Mfr. Part No. KTK-R-1-2
Each
MYR284.41
Schneider Electric 25A Fuse Holder for 8.5 x 31.5mm Fuse, 1P, 400V ac
  • RS Stock No. 275-8758
  • Mfr. Part No. DF81
Each
MYR69.43
ABB F200 RCCB, 40A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 176-9636
  • Mfr. Part No. F204F-40/0.03
Each
MYR4,157.19
Better World
Schneider Electric iID RCCB, 40A, 4 Pole, 300mA, Type B-SI, 400V ac
  • RS Stock No. 248-3724
  • Mfr. Part No. A9Z64440
Each
MYR8,856.13
Eaton 2.5A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-900
  • Mfr. Part No. FNQ-R-2-1/2
1 Pack of 10
MYR3,157.00
Siemens 630A Centred Tag Fuse, NH3, 500V ac
  • RS Stock No. 203-2104
  • Mfr. Part No. 3NA3372
Each (In a Pack of 3)
MYR262.117
Schurter SMD Non Resettable Fuse 12A, 32 V ac, 63V dc
  • RS Stock No. 703-2789P
  • Mfr. Part No. 3413.0329.22
Each (Supplied on a Reel)
MYR2.632
Eaton 2A T Phenolic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7134
  • Mfr. Part No. HVI-HH-R
Each
MYR19.27
Better World
Schneider Electric iID RCCB, 40A, 4 Pole, 30mA, Type B-SI, 400V ac
  • RS Stock No. 248-3719
  • Mfr. Part No. A9Z61440
Each
MYR5,065.53
Better World
Schneider Electric Acti 9 IC60L MCB, 3P, 20A Curve K, 400V AC, 180V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0146
  • Mfr. Part No. A9F95320
Each
MYR2,091.00
Eaton 80A Bolted Tag Fuse, A3, 500V ac, 73mm
  • RS Stock No. 181-8681
  • Mfr. Part No. BAO80
Each
MYR181.86
Schneider Electric RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 212-021
  • Mfr. Part No. R9D01606
Each
MYR857.41
Eaton 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 849-5541
  • Mfr. Part No. GDC-2A
Each
MYR6.88
Littelfuse SMD Non Resettable Fuse 250mA, 125V ac/dc
  • RS Stock No. 541-3338
  • Mfr. Part No. 0451.250MRL
Each (In a Pack of 10)
MYR6.125
Eaton xEffect MCB, 1P, 10A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6908
  • Mfr. Part No. 102087 FAZ-C10/1-NA
Each
MYR175.21
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 3P, 15A Curve C, 277V AC
  • RS Stock No. 256-6807
  • Mfr. Part No. M9F52315
Each
MYR1,407.76
ABB 125A Centred Tag Fuse, NH00, 500V
  • RS Stock No. 779-9987
  • Mfr. Part No. OFAF00H125 1SCA022627R1630
Each
MYR42.17
Eaton 32A Bolted Tag Fuse, LET, 150 V dc, 240V ac, 41.8mm
  • RS Stock No. 156-8800
  • Mfr. Part No. 32LET
Each
MYR89.77
Eaton 350A British Standard Fuse, FM, 690 V ac, 500V dc, 80 → 85mm
  • RS Stock No. 156-9112
  • Mfr. Part No. 350FM
Each
MYR361.73
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