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 RC Suppressor Circuit for use with Contactors
  • RS stock no. 277-8523
Each
R 292.33(exc. VAT)
In Stock
Europa Blanking Plate
  • RS stock no. 201-7936
  • Mfr. Part No. ECUBP
1 Pair
R 99.12(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS stock no. 767-5052
Each (In a Pack of 10)
R 5.855(exc. VAT)
In Stock
Eaton 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 233-0568
  • Mfr. Part No. BK14-HTC-613M
Each (In a Pack of 10)
R 195.938(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 3P, 3A Curve C
  • RS stock no. 216-4324
  • Mfr. Part No. 5SL6303-7
Each
R 2,023.32(exc. VAT)
In Stock
Eaton 6A T Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 854-8890
  • Mfr. Part No. FNQ-R-6
Each
R 1,322.96(exc. VAT)
Being discontinued
RS PRO 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-558
Each (In a Pack of 10)
R 1.449(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 1P, 16A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS stock no. 212-8854
  • Mfr. Part No. 5SJ4116-7HG42
Each
R 1,279.56(exc. VAT)
In Stock
Eaton 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 852-7089
  • Mfr. Part No. MDA-5-R
Each
R 28.73(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)
Temporarily out of stock
Eaton xEffect MCB, 1+N, 4A Curve B
  • RS stock no. 230-0913
  • Mfr. Part No. 177501 FAZ6-B4/1N
Each
R 712.02(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 25A Curve C, 250V DC, 20 kA Breaking Capacity
  • RS stock no. 776-3171
  • Mfr. Part No. A9N61513
Each
R 657.72(exc. VAT)
In Stock
Schurter SMD Non Resettable Fuse 1A, 125V ac/dc
  • RS stock no. 733-4877
  • Mfr. Part No. 3404.0114.22
Each (In a Bag of 5)
R 14.622(exc. VAT)
In Stock
Eaton 85A British Standard Fuse, 660 V ac, 400V dc, 72mm
  • RS stock no. 414-926
  • Mfr. Part No. GSGB85
Each (In a Pack of 5)
R 1,896.144(exc. VAT)
In Stock
Schurter SMD Non Resettable Fuse 630mA, 125V ac/dc
  • RS stock no. 777-7511
  • Mfr. Part No. 3404.0008.11
Each
R 17.30(exc. VAT)
In Stock
RS PRO 5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3470
Each (In a Pack of 10)
R 3.89(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 500mA Current Rating
  • RS stock no. 336-028
  • Mfr. Part No. 106-P30-000040-0.5A
Each
R 367.96(exc. VAT)
In Stock
Better World
Siemens SENTRON 5SY7 MCB, 2P, 2A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS stock no. 209-6706
  • Mfr. Part No. 5SY7202-7
Each
R 1,975.37(exc. VAT)
In Stock
Eaton 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 849-5585
  • Mfr. Part No. GMD-1-R
Each
R 114.15(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron Circuit breaker 3P 400A, DIN Rail Mount
  • RS stock no. 196-3582
  • Mfr. Part No. 3VA63251MS310AA0
Each
R 34,966.03(exc. VAT)
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