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

12 of 999+
Littelfuse 125mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-2919
  • Mfr. Part No. 0218.125MXP
Each (In a Pack of 10)
R 30.789(exc. VAT)
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 4A Curve C, 240V AC, 72V DC, 50 kA Breaking Capacity
  • RS stock no. 776-3449
  • Mfr. Part No. A9F74104
Each
R 388.71(exc. VAT)
Schurter 10A M Glass Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 865-7415
  • Mfr. Part No. 0034.2526
Each (In a Pack of 10)
R 15.96(exc. VAT)
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 30 kA, Fixed Mount
  • RS stock no. 432-856
  • Mfr. Part No. C080N32EFM
Each
R 75,182.09(exc. VAT)
Siemens ALPHA Busbar
  • RS stock no. 226-0831
  • Mfr. Part No. 8GK9733-0KK10
Each
R 910.09(exc. VAT)
RS PRO 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6079
Each (In a Pack of 10)
R 2.93(exc. VAT)
Better World
Siemens SENTRON 5SY8 MCB, 3P, 32A Curve C
  • RS stock no. 216-5951
  • Mfr. Part No. 5SY8332-7
Each
R 3,524.84(exc. VAT)
RS PRO 15A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-4644
Each
R 182.81(exc. VAT)
RS PRO Residential RCCBs, 25A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 284-2367
Each
R 711.84(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)
Eaton 6A T Cartridge Fuse, 21 x 57mm
  • RS stock no. 773-3536
  • Mfr. Part No. LPJ-6SP
Each
R 1,322.27(exc. VAT)
Sensata Airpax Airpax Thermal Circuit Breaker - LELK1 Single Pole Panel Mount, 15A Current Rating
  • RS stock no. 275-0394
  • Mfr. Part No. LELK1-1-62F-15.0-A-91-V
Each
R 1,309.47(exc. VAT)
Schneider Electric, ComPacT MCCB 3P 630A, Breaking Capacity 50 kA, Fixed Mount
  • RS stock no. 260-8223
  • Mfr. Part No. C63N32D630
Each
R 102,696.27(exc. VAT)
Eaton xEffect MCB, 3P, 16A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS stock no. 769-4573
  • Mfr. Part No. 239148 FAZ6-C16/3
Each
R 2,212.78(exc. VAT)
RS PRO 5A Tan Blade Car Fuse, 32V dc
  • RS stock no. 563-536
Each (In a Pack of 10)
R 14.122(exc. VAT)
Schurter Non-Resettable Fuse Kit
  • RS stock no. 122-3333
  • Mfr. Part No. 0034.9857
Each
R 2,579.09(exc. VAT)
Eaton xPole MCB, 2P, 10A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 864-4358
  • Mfr. Part No. 242401 PLSM-C10/2-MW
Each
R 1,566.45(exc. VAT)
Better World
Schneider Electric PrismaSeT Front Plate for use with PrismaSeT
  • RS stock no. 272-7481
  • Mfr. Part No. LVS03203
Each
R 446.94(exc. VAT)
Eaton 200A British Standard Fuse, B2, 415V ac, 111mm
  • RS stock no. 156-8709
  • Mfr. Part No. DD200
Each
R 673.48(exc. VAT)
Littelfuse 2A Grey Blade Car Fuse, 32V dc
  • RS stock no. 787-4117
  • Mfr. Part No. 0297002.WXNV
Each (In a Pack of 10)
R 5.073(exc. VAT)
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