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

55 / 999+
Eaton 400A Tag Fuse, 64 x 225mm, 660V
  • RS Stock No. 261-687
  • Mfr. Part No. TMT400
Each
MYR1,193.71
Eaton 20A Fuse Holder for 79 x 27 x 55mm Fuse, 1P, 690V ac
  • RS Stock No. 261-368
  • Mfr. Part No. RS20HWH
1 Pack of 10
MYR1,302.67
Schneider Electric A9Z RCCB, 40A, 4 Pole, 100mA, Type A-SI, 380-415V ac
  • RS Stock No. 211-967
  • Mfr. Part No. A9Z32440
Each
MYR1,456.95
ABB F200 RCCB, 100A, 4 Pole, 30mA, Type AC
  • RS Stock No. 538-3855
  • Mfr. Part No. 2CSF204001R1900 F204 AC-100/0,03
Each
MYR1,362.70
Better World
Schneider Electric 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS Stock No. 482-859
  • Mfr. Part No. DF103
Each
MYR224.99
Schneider Electric RCBO, 20A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 222-8513
  • Mfr. Part No. SEE120B03
Each
MYR318.63
Schurter 8A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3877
  • Mfr. Part No. 8020.5077
Each
MYR4.00
RS PRO 800mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8125
Each (In a Pack of 50)
MYR1.611
MK Electric Earthing Lead Adapter Brass
  • RS Stock No. 491-822
  • Mfr. Part No. 9933
Each
MYR83.16
Siemens 20A D02 Neozed Fuse, gG, 400V
  • RS Stock No. 202-7145
  • Mfr. Part No. 5SE2320
Each (In a Pack of 10)
MYR6.725
ABB F200 RCCB, 25A, 2 Pole, 30mA, Type A, 110V ac
  • RS Stock No. 177-5063
  • Mfr. Part No. 2CSF202199R1250 F202 A-25/0,03 110V
Each
MYR967.69
Siemens 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-235
  • Mfr. Part No. 3NA6805
Each (In a Pack of 3)
MYR38.703
RS PRO 16A British Standard Fuse, F1, 550V ac
  • RS Stock No. 521-2927
Each (In a Pack of 5)
MYR22.87
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 272-0182
  • Mfr. Part No. 3VA1580-5EF32-0AA0
Each
MYR14,563.68
RS PRO PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 767-5216
Each (In a Pack of 10)
MYR2.082
Eaton 200A Rail Mount Fuse Holder for B2 Fuse, 1P, 690V ac
  • RS Stock No. 415-092
  • Mfr. Part No. RS200H
Each
MYR1,416.37
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2062
  • Mfr. Part No. 3120-N521-H7T1-W01D-10A
Each
MYR206.12
Contactum 6 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9105
  • Mfr. Part No. DD061MS
Each
MYR500.08
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 63A Curve C, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 219-9135
  • Mfr. Part No. M9F22363
Each
MYR1,330.75
Better World
ABB, Tmax XT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 236-6611
  • Mfr. Part No. 1SDA068138R1 XT4N 160 Ekip LSIG 63A FF
Each
MYR4,012.08
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