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

46578 Products showing for Fuses & Circuit Breakers

150 / 999+
Littelfuse 50A Red Blade Car Fuse, 32V dc
  • RS Stock No. 894-9584
  • Mfr. Part No. 0299050.ZXNV
Each (In a Pack of 5)
MYR8.322
Hager RCBO, 20A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-206
  • Mfr. Part No. ADM470C
Each
MYR2,630.24
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 384-099
  • Mfr. Part No. 3101.0050
Each (In a Pack of 5)
MYR18.288
Schneider Electric, ComPacT New generation MCCB 4P 400A, Breaking Capacity 800 → 1000 V, Fixed Mount
  • RS Stock No. 205-228
  • Mfr. Part No. C40K42D400
Each
MYR24,346.22
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4LE 3 Pole 690V ac Voltage Rating, 25A Current Rating
  • RS Stock No. 175-1475
  • Mfr. Part No. GV4LE25N6
Each
MYR2,293.89
RS PRO Non-Resettable Wire Ended Fuse 4A, 250V ac
  • RS Stock No. 911-3556
Each (In a Pack of 10)
MYR1.221
Eaton 63A gG/gL Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-767
  • Mfr. Part No. C22G63 CYLINDRICAL FUSE 22 x 58 63A GG 690V AC
1 Pack of 10
MYR188.83
Better World
Schneider Electric Linergy Busbar, 690V, 64mm Pitch
  • RS Stock No. 212-0182
  • Mfr. Part No. GV3G364
Each
MYR264.25
32A Neutral Link x 9mm
  • RS Stock No. 262-483
  • Mfr. Part No. 32CMLC
1 Pack of 10
MYR250.33
RS PRO 8A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 247-4043
Each (In a Pack of 10)
MYR3.339
Schurter 751 Bronze PCB Mount Fuse Clip for 5 x 20mm
  • RS Stock No. 876-7830
  • Mfr. Part No. 0751.0052
Each (In a Pack of 100)
MYR0.867
Better World
Siemens Sentron 5SY4 MCB, 3P, 4A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 622-0109
  • Mfr. Part No. 5SY4304-7
Each
MYR733.49
Contactum 6 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9105
  • Mfr. Part No. DD061MS
Each
MYR500.08
Phoenix Contact CLIPLINE Thermal Circuit Breaker - UT 6-TMC Single Pole 250V Voltage Rating DIN Rail Mount, 12A
  • RS Stock No. 684-3617
  • Mfr. Part No. 0916611
Each
MYR111.23
Better World
Schneider Electric Auto Recloser for use with 4P iID
  • RS Stock No. 221-1102
  • Mfr. Part No. A9C70344
Each
MYR4,000.19
Better World
ABB, Tmax XT MCCB 3P 32A, Fixed Mount
  • RS Stock No. 236-7497
  • Mfr. Part No. 1SDA067786R1 XT2L 160 MA 32 FF
Each
MYR2,471.80
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 16A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9454
  • Mfr. Part No. 3VA1196-4ED22-0AA0
Each
MYR1,503.73
Better World
Siemens Sentron 5SY4 MCB, 4P, 16A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3198
  • Mfr. Part No. 5SY4416-8
Each
MYR905.20
Better World
Schneider Electric, NSX Range MCCB 4P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 849-4084
  • Mfr. Part No. LV429690
Each
MYR3,275.29
RS PRO Industrial Surge Protector, 10kA, 30 V, DIN Rail Mount
  • RS Stock No. 101-761
Each
MYR465.34
1
150
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