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

50690 Products showing for Fuses & Circuit Breakers

14 of 999+
RS PRO 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 177-8085
Each (In a Pack of 50)
R 8.194(exc. VAT)
RS PRO 8A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-497
Each (In a Pack of 10)
R 8.585(exc. VAT)
SIBA 40A Ceramic Cartridge Fuse, 14 x 51mm
  • RS stock no. 247-4201
  • Mfr. Part No. 50-124-06/40A
Each
R 417.36(exc. VAT)
Altech 20A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 898-2228
  • Mfr. Part No. 20C10X38GI
Each (In a Pack of 10)
R 83.88(exc. VAT)
Schneider Electric, PowerPact Circuit breaker 3P 80A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS stock no. 358-465
  • Mfr. Part No. NHDF36080TW
Each
R 13,365.40(exc. VAT)
RS PRO 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 563-784
Each
R 78.91(exc. VAT)
Eaton xEffect MCB, 1P, 6A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS stock no. 624-0349
  • Mfr. Part No. 278555 FAZ-C6/1
Each
R 640.28(exc. VAT)
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 2A Current Rating
  • RS stock no. 335-996
  • Mfr. Part No. 106-P30-000040-2A
Each
R 367.66(exc. VAT)
Better World
Schneider Electric RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Resi9 Range
  • RS stock no. 247-2231
  • Mfr. Part No. R9D01616
Each
R 1,035.57(exc. VAT)
Better World
ABB, Protecta MCCB 3P 250A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS stock no. 831-9181
  • Mfr. Part No. 1SDA068208R1 XT1D 160 3p F F
Each
R 7,210.92(exc. VAT)
RS PRO PC Board Non Resettable Fuse, Radial 1.25A, 250V
  • RS stock no. 767-5143
Each (In a Pack of 10)
R 5.754(exc. VAT)
RS PRO 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 177-8144
Each (In a Pack of 20)
R 16.488(exc. VAT)
Eaton 120A British Standard Fuse, FEE, 690V, 70mm
  • RS stock no. 156-9027
  • Mfr. Part No. 120FEE
Each
R 1,356.28(exc. VAT)
RS PRO 30A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-4612
Each
R 182.81(exc. VAT)
Eaton 400A Bolted Tag Fuse, MMT, 500 V dc, 690V ac, 85mm
  • RS stock no. 182-1467
  • Mfr. Part No. 400MMT
Each
R 2,688.63(exc. VAT)
Eaton 200A Centred Tag Fuse, NH1, 500V ac
  • RS stock no. 703-8706
  • Mfr. Part No. 200NHG1B
Each
R 281.25(exc. VAT)
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 269-3863
  • Mfr. Part No. 8020.0603
Each
R 15.95(exc. VAT)
ABB, Protecta MCCB 3P 160A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS stock no. 831-9175
  • Mfr. Part No. 1SDA067418R1 XT1N 160 TMD 160-1600 3p F F
Each
R 8,677.88(exc. VAT)
RS PRO 13A T Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS stock no. 174-7960
Each (In a Box of 500)
R 4.09(exc. VAT)
SIBA Surface Mount Fuse Clip for 10 x 38mm
  • RS stock no. 247-4071
  • Mfr. Part No. 10X38CLIPS
Each
R 73.02(exc. VAT)
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