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

16 of 999+
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)
In Stock
Schurter Surface Mount Fuse 7A, 125V ac
  • RS stock no. 270-7947
  • Mfr. Part No. 3404.0019.11
Each
R 16.85(exc. VAT)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 62mA, 125V ac/dc
  • RS stock no. 541-3221
  • Mfr. Part No. 0251.062HAT1L
Each (In a Pack of 10)
R 98.957(exc. VAT)
In Stock
RS PRO 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 721-1601
Each (In a Pack of 10)
R 22.831(exc. VAT)
In Stock
Hager MJT MCB, 2P, 16A Curve C, 240 → 400V AC, 6 kA Breaking Capacity
  • RS stock no. 144-4950
  • Mfr. Part No. MJT716
Each
R 643.85(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)
Temporarily out of stock
ABB FH200 RCCB, 63A, 2 Pole, 30mA, Type A
  • RS stock no. 186-3467
  • Mfr. Part No. 2CSF202124R1630
Each
R 2,275.90(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
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS stock no. 769-0170
  • Mfr. Part No. 03453LF1H
Each
R 108.99(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W28 Single Pole 32 V dc, 250V ac Voltage Rating, 3A Current Rating
  • RS stock no. 782-0911
  • Mfr. Part No. W28-XQ1A-3
Each
R 103.87(exc. VAT)
In Stock
SIBA Surface Mount Fuse Clip for 10 x 38mm
  • RS stock no. 247-4071
  • Mfr. Part No. 10X38CLIPS
Each
R 73.02(exc. VAT)
In Stock
ABB Tmax T Motor Operator for use with MCCB
  • RS stock no. 232-0141
  • Mfr. Part No. 1SDA060398R1 MOE 220-250VACDC T6
Each
R 34,781.24(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 63A Curve C, 400V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9181
  • Mfr. Part No. A9F77463
Each
R 1,513.59(exc. VAT)
In Stock
Rittal SZ Busbar
  • RS stock no. 230-4854
  • Mfr. Part No. 2364000
Each
R 2,320.04(exc. VAT)
New product - Preorder today
Schneider Electric 550V (Volts) Earth Leakage Add-on Protection Module Circuit Trip for use with ComPacT NSX250 Circuit
  • RS stock no. 654-165
  • Mfr. Part No. LV429494
Each
R 43,113.31(exc. VAT)
In Stock
Mersen 25A DII Diazed Fuse, E27 Thread Size, gG, 500V
  • RS stock no. 377-0493
  • Mfr. Part No. X212540
Each (In a Pack of 5)
R 33.566(exc. VAT)
In Stock
Schurter SMD Non Resettable Fuse 2A, 125V ac/dc
  • RS stock no. 131-476
  • Mfr. Part No. 3404.0012.11
Each (In a Pack of 10)
R 16.899(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)
In Stock
Eaton 400A Bolted Tag Fuse, MMT, 500 V dc, 690V ac, 85mm
  • RS stock no. 182-1467
  • Mfr. Part No. 400MMT
Each
R 2,688.63(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 3130 Single Pole 50 V dc, 250V ac Voltage Rating Snap In, 5A Current Rating
  • RS stock no. 212-2130
  • Mfr. Part No. 3130-F110-P7T1-W14QR7-5A
Each
R 738.40(exc. VAT)
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