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

24 of 999+
In Stock
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 1A Current Rating
  • RS stock no. 729-2833
  • Mfr. Part No. 3600-P10-Si-1A
Each
R 1,617.38(exc. VAT)
Temporarily out of stock
Wurth Elektronik 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 893-0586
  • Mfr. Part No. 696106003002
Each (In a Pack of 10)
R 13.556(exc. VAT)
In Stock
Hager NFN MCB, 2P, 10A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS stock no. 144-4712
  • Mfr. Part No. NFN210
Each
R 1,906.33(exc. VAT)
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 1.25kA, Fixed Mount
  • RS stock no. 232-0158
  • Mfr. Part No. 1SDA062882R1 T7S-M 1250A PR231-LS/I FF
Each
R 93,793.40(exc. VAT)
In Stock
Eaton 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS stock no. 413-377
  • Mfr. Part No. AAO32
Each (In a Pack of 5)
R 158.39(exc. VAT)
In Stock
Better World
Schneider Electric Compact Nsx, Compact Nsx Dc, Easypact Cvs Mechanical Interlock for use with Compact Nsx 400/630
  • RS stock no. 221-1272
  • Mfr. Part No. LV432621
Each
R 7,365.05(exc. VAT)
In Stock
Eaton 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1240
  • Mfr. Part No. S500-500-R
Each (In a Pack of 10)
R 7.317(exc. VAT)
In Stock
Littelfuse 20A Yellow Blade Car Fuse, 32V dc
  • RS stock no. 787-4151
  • Mfr. Part No. 0297020.WXNV
Each (In a Pack of 10)
R 5.115(exc. VAT)
Currently unavailable
Siemens SIRIUS 3 Phase Busbar, 690V
  • RS stock no. 218-865
  • Mfr. Part No. 3RV2925-5AB
Each
R 241.76(exc. VAT)
Temporarily out of stock
ABB, XT2S MCCB 3P 50A, Fixed Mount
  • RS stock no. 236-7356
  • Mfr. Part No. 1SDA067555R1 XT2S 160 TMA 50A FF
Each
R 7,491.11(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 20A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9153
  • Mfr. Part No. A9F77320
Each
R 1,356.42(exc. VAT)
Temporarily out of stock
Siemens RCCB, 25A, 2 Pole, 30mA, Type F, 230V
  • RS stock no. 269-9754
  • Mfr. Part No. 5SV3322-3KK60
Each
R 14,750.23(exc. VAT)
In Stock
Eaton 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 703-8392
  • Mfr. Part No. C10G20
Each (In a Pack of 10)
R 27.052(exc. VAT)
In Stock
Eaton 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS stock no. 849-5591
  • Mfr. Part No. HFA-R
Each
R 466.94(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)
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)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 25A Curve C, 100 → 130V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9175
  • Mfr. Part No. A9F77425
Each
R 1,483.11(exc. VAT)
Temporarily out of stock
Eaton 30A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 480V
  • RS stock no. 225-8215
  • Mfr. Part No. BK-HVP-CC-R
Each (In a Pack of 5)
R 153.042(exc. VAT)
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS stock no. 232-0215
  • Mfr. Part No. 1SDA066806R1 XT1B 160 TMD 80A FF
Each
R 5,042.00(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 375mA, 125V ac/dc
  • RS stock no. 541-3344
  • Mfr. Part No. 0451.375MRL
Each (In a Pack of 10)
R 26.313(exc. VAT)
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