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

50687 Products showing for Fuses & Circuit Breakers

20 of 999+
In Stock
ABB System Pro M Compact S200 MCB, 1P, 10A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 488-6836
  • Mfr. Part No. 2CDS251001R0104 - S201C10
Each
R 430.02(exc. VAT)
In Stock
Bulgin 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 359-5961
  • Mfr. Part No. FX0296/1
Each (In a Pack of 5)
R 110.678(exc. VAT)
In Stock
Schneider Electric R9E RCCB, 63A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 276-8941
  • Mfr. Part No. R9ERA263
Each
R 1,864.23(exc. VAT)
In Stock
Omron Busbar
  • RS stock no. 111-3531
  • Mfr. Part No. PYDN-7.75-020R
Each
R 25.52(exc. VAT)
In Stock
Littelfuse 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4319
  • Mfr. Part No. 0217.250MXP
Each (In a Pack of 10)
R 22.683(exc. VAT)
In Stock
Eaton 250A Rail Mount Fuse Holder for NH1 Fuse, 1P, 690V ac
  • RS stock no. 182-1805
  • Mfr. Part No. SD1-D-PV
Each
R 1,004.78(exc. VAT)
In Stock
RS PRO 3.15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 414-049
Each (In a Pack of 10)
R 26.154(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti 9 Range
  • RS stock no. 790-9213
  • Mfr. Part No. A9D31820
Each
R 3,809.60(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 1P, 16A Curve C, 15 kA Breaking Capacity
  • RS stock no. 219-9266
  • Mfr. Part No. A9F94116
Each
R 1,301.99(exc. VAT)
In Stock
Mersen 315A NH Fuse, NH2, 400V ac
  • RS stock no. 270-3088
  • Mfr. Part No. N223733
Each
R 911.54(exc. VAT)
In Stock
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 610-9822
Each (In a Pack of 10)
R 11.303(exc. VAT)
In Stock
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)
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Radial 50mA, 125V ac/dc
  • RS stock no. 878-3233
  • Mfr. Part No. 0273.050H
Each
R 142.13(exc. VAT)
In Stock
Weidmuller 1 Phase Surge Protector, 16A, DIN Rail Mount
  • RS stock no. 249-3334
  • Mfr. Part No. 1351650000
Each
R 2,170.80(exc. VAT)
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 2P, 10A Curve C, 400V AC, 72V DC
  • RS stock no. 213-1038
  • Mfr. Part No. 5SL6210-7
Each
R 1,187.45(exc. VAT)
In Stock
Better World
Schneider Electric ComPact NSX Snap In Nut for use with Compact NSX 160/250
  • RS stock no. 219-9368
  • Mfr. Part No. LV430554
Each
R 1,221.04(exc. VAT)
In Stock
Eaton 40A British Standard Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS stock no. 156-8939
  • Mfr. Part No. 40FE
Each
R 460.23(exc. VAT)
In Stock
SIBA 500mA M Ceramic Cartridge Fuse, 5 x 25mm
  • RS stock no. 267-3464
  • Mfr. Part No. 70-010-05/0.5A
Each (In a Pack of 5)
R 148.298(exc. VAT)
In Stock
Littelfuse 2A Grey Blade Car Fuse, 32V dc
  • RS stock no. 787-4126
  • Mfr. Part No. 0287002.PXCN
Each (In a Pack of 10)
R 6.602(exc. VAT)
In Stock
Schurter 16A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 269-3870
  • Mfr. Part No. 8020.5023
Each
R 14.43(exc. VAT)
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