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

2 of 999+
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 25 kA, Fixed Mount
  • RS stock no. 874-4203
  • Mfr Part No. 3VA1116-3EE36-0AA0
Each
R 8,086.35(exc. VAT)
Better World
Siemens SENTRON 5SL6 MCB, 1P, 20A Curve C, 6 kA Breaking Capacity
  • RS stock no. 202-7173
  • Mfr Part No. 5SL6120-7
Each
R 400.62(exc. VAT)
Eaton 250A Bolted Tag Fuse, 415V ac, 92mm
  • RS stock no. 181-8849
  • Mfr Part No. 250MJ31-7
Each
R 1,570.66(exc. VAT)
Better World
Siemens SENTRON 5SY5 MCB, 2P, 10A Curve C, 10 kA Breaking Capacity
  • RS stock no. 203-2341
  • Mfr Part No. 5SY5210-7
Each
R 2,574.52(exc. VAT)
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 3 channels
  • RS stock no. 157-241
  • Mfr Part No. 3VA2163-8KQ36-0AA0
Each
R 32,841.93(exc. VAT)
RS PRO 3A Violet Blade Car Fuse, 32V dc
  • RS stock no. 563-712
Each (In a Pack of 10)
R 14.122(exc. VAT)
Eaton 32A British Standard Fuse, A1, 415V, 42.5mm
  • RS stock no. 139-912
  • Mfr Part No. NITD32M50
Each (In a Pack of 5)
R 180.804(exc. VAT)
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 40A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS stock no. 209-6670
  • Mfr Part No. 5SY4640-7
Each
R 3,737.05(exc. VAT)
Better World
Siemens SENTRON 5SY8 MCB, 1P, 20A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS stock no. 213-1108
  • Mfr Part No. 5SY8120-7
Each
R 1,061.07(exc. VAT)
Eaton 315A Bolted Tag Fuse, 415V ac, 92mm
  • RS stock no. 181-8796
  • Mfr Part No. 315MJ31-7
Each
R 1,658.52(exc. VAT)
RS PRO 10A Red Blade Car Fuse, 32V dc
  • RS stock no. 563-744
Each (In a Pack of 10)
R 10.653(exc. VAT)
Better World
Siemens Sentron 5SY4 MCB, 1P, 16A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS stock no. 772-1256
  • Mfr Part No. 5SY4116-8
Each
R 522.98(exc. VAT)
Carling Technologies Thermal Circuit Breaker - C Single Pole 240V Voltage Rating Panel Mount, 30A Current Rating
  • RS stock no. 881-0830
  • Mfr Part No. CA1-B0-34-630-121-C
Each
R 607.71(exc. VAT)
Eaton 150A Bolted Tag Fuse, 500V, 73.41mm
  • RS stock no. 850-7118
  • Mfr Part No. FWH-150B
Each
R 2,552.29(exc. VAT)
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Fixed Mount
  • RS stock no. 232-0281
  • Mfr Part No. 1SDA068475R1 XT4S 250 Ekip LS/I 250A FF
Each
R 20,078.85(exc. VAT)
RS PRO Earthing Kit
  • RS stock no. 528-983
Each
R 520.56(exc. VAT)
Eaton RCD, 32A, 2 Pole, 30mA, Type C
  • RS stock no. 922-8752
  • Mfr Part No. 236305 PKNM-32/1N/C/003-MW
Each
R 3,375.08(exc. VAT)
RS PRO Residential RCCBs, 63A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 284-2371
Each
R 922.75(exc. VAT)
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 10A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9068
  • Mfr Part No. A9F77210
Each
R 905.87(exc. VAT)
Better World
Siemens Sentron 5SY6 MCB, 1P, 10A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 489-6603
  • Mfr Part No. 5SY6110-7
Each
R 444.53(exc. VAT)
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