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

11 of 999+
In Stock
RS PRO 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 247-4009
Each (In a Pack of 10)
R 25.403(exc. VAT)
In Stock
Littelfuse 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 878-3781
  • Mfr. Part No. 0218005.HXP
Each (In a Pack of 50)
R 6.272(exc. VAT)
In Stock
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)
In Stock
Better World
Schneider Electric Multi 9 MCB, 1P, 16A Curve C, 10 kA Breaking Capacity
  • RS stock no. 219-9120
  • Mfr. Part No. M9F22116
Each
R 703.36(exc. VAT)
In Stock
Eaton 6A Centred Tag Fuse, NH000, 500V ac
  • RS stock no. 703-8611
  • Mfr. Part No. 6NHG000B
Each
R 117.21(exc. VAT)
In Stock
Mersen 150A British Standard Fuse, 17 x 27mm, 250V ac, 38 → 42.8mm
  • RS stock no. 304-2704
  • Mfr. Part No. W085556
Each
R 613.72(exc. VAT)
In Stock
RS PRO 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 611-0282
Each (In a Pack of 10)
R 28.187(exc. VAT)
In Stock
Eaton 400A Centred Tag Fuse, NH2, 690V
  • RS stock no. 182-1765
  • Mfr. Part No. 170M5808D
Each
R 6,925.54(exc. VAT)
In Stock
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)
In Stock
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS stock no. 563-766
Each (In a Pack of 10)
R 8.965(exc. VAT)
In Stock
Eaton 11A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 459-7924
  • Mfr. Part No. DMM-B-11A
Each (In a Pack of 5)
R 287.36(exc. VAT)
Temporarily out of stock
Eaton 40A DIII Bottle Fuse, 500V
  • RS stock no. 228-748
  • Mfr. Part No. 40D33
1 Pack of 5
R 243.55(exc. VAT)
In Stock
Eaton 63A Rail Mount Fuse Holder for A1 Fuse, 1P, 1.2 kV ac, 750V dc
  • RS stock no. 182-1775
  • Mfr. Part No. RSL63H
Each
R 2,138.48(exc. VAT)
In Stock
Eaton 200A British Standard Fuse, B2, 415V ac, 111mm
  • RS stock no. 156-8709
  • Mfr. Part No. DD200
Each
R 673.48(exc. VAT)
Temporarily out of stock
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)
In Stock
Siemens 6A Centred Tag Fuse, NH000, 690V
  • RS stock no. 210-6899
  • Mfr. Part No. 3NA3801-6
Each (In a Pack of 3)
R 662.283(exc. VAT)
Currently unavailable
Better World
Schneider Electric, NSX Range MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS stock no. 849-3964
  • Mfr. Part No. LV429632
Each
R 5,605.34(exc. VAT)
In Stock
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)
In Stock
Schneider Electric, Wiser Energy PowerTag, 63A, Energy Sensor, 2VA, Wireless
  • RS stock no. 276-9362
  • Mfr. Part No. R9M70
Each
R 2,216.31(exc. VAT)
In Stock
Siemens 80A NH Fuse, NH1, 500V ac
  • RS stock no. 397-597
  • Mfr. Part No. 3NA3124
Each (In a Pack of 3)
R 285.24(exc. VAT)
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