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

50687 Products showing for Fuses & Circuit Breakers

24 of 999+
Temporarily out of stock
Schneider Electric Acti9 iID RCCB, 25A, 2 Pole, 300mA, Type AC, 220 → 240V ac
  • RS stock no. 654-768
  • Mfr. Part No. A9R41225
Each
R 3,878.39(exc. VAT)
Temporarily out of stock
Allen Bradley 1492-D2 1492-D MCB, 2P, 25A Curve C, 10 kA Breaking Capacity
  • RS stock no. 218-8559
  • Mfr. Part No. 1492-D2C250
Each
R 2,318.71(exc. VAT)
In Stock
Eaton xEffect MCB, 1P, 10A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS stock no. 624-0333
  • Mfr. Part No. 278557 FAZ-C10/1
Each
R 590.34(exc. VAT)
In Stock
Schurter 8A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 830-4240
  • Mfr. Part No. 8020.5020.G
Each (In a Pack of 10)
R 18.342(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse 3.15A, 250V ac
  • RS stock no. 911-3552
Each (In a Pack of 10)
R 5.858(exc. VAT)
In Stock
Littelfuse 20A Yellow Blade Car Fuse, 32V dc
  • RS stock no. 787-4151
  • Mfr. Part No. 0297020.WXNV
Each (In a Pack of 10)
R 5.115(exc. VAT)
In Stock
RS PRO 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3518
Each (In a Pack of 10)
R 8.951(exc. VAT)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 20 kA, Fixed Mount
  • RS stock no. 232-0085
  • Mfr. Part No. 1SDA054325R1 T5N400 FF PR221-LS 400A
Each
R 39,086.39(exc. VAT)
In Stock
Littelfuse 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4325
  • Mfr. Part No. 0217.315MXP
Each (In a Pack of 10)
R 22.052(exc. VAT)
Being discontinued
RS PRO 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-479
Each (In a Pack of 10)
R 6.648(exc. VAT)
In Stock
Schurter 25A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 703-2672
  • Mfr. Part No. 8020.0606.G
Each (In a Pack of 10)
R 23.231(exc. VAT)
In Stock
Eaton 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1161
  • Mfr. Part No. S500-2.5-R
Each (In a Pack of 10)
R 3.416(exc. VAT)
In Stock
Littelfuse 15A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 769-0057
  • Mfr. Part No. 0314015.HXP
Each (In a Pack of 10)
R 12.324(exc. VAT)
In Stock
Eaton 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1240
  • Mfr. Part No. S500-500-R
Each (In a Pack of 10)
R 7.317(exc. VAT)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 250mA, 125V ac/dc
  • RS stock no. 820-7142
  • Mfr. Part No. 0440.250WR
Each (In a Pack of 100)
R 13.509(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 20A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9153
  • Mfr. Part No. A9F77320
Each
R 1,356.42(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS stock no. 335-968
  • Mfr. Part No. 106-P30-000040-5A
Each
R 367.75(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 2 Phase Busbar, 415V ac, 18mm Pitch
  • RS stock no. 776-2724
  • Mfr. Part No. A9XPH224
Each
R 1,212.14(exc. VAT)
In Stock
Eaton 10A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS stock no. 228-663
  • Mfr. Part No. C10M10 CYLINDRICAL FUSE 10 x 38 10A AM 500V AC
1 Pack of 10
R 221.47(exc. VAT)
In Stock
Littelfuse 300A Grey, White CF Car Fuse, 58V dc
  • RS stock no. 337-7993
  • Mfr. Part No. 155.0892.6301
Each
R 234.14(exc. VAT)
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