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

27 of 999+
In Stock
Bourns 0.75A Resettable Fuse, 60V
  • RS stock no. 691-7585P
  • Mfr. Part No. MF-SM075/60-2
Each (Supplied on a Reel)
R 7.674(exc. VAT)
In Stock
Schurter 20A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 144-1826
  • Mfr. Part No. 8020.5024.G
Each (In a Bag of 10)
R 17.559(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W31 Single Pole 50 V dc, 240V ac Voltage Rating, 10A Current Rating
  • RS stock no. 782-0930
  • Mfr. Part No. W31-X2M1G-10
Each
R 953.32(exc. VAT)
In Stock
SIBA 1.6A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 783-3232
  • Mfr. Part No. 70-007-33/1.6A
Each (In a Pack of 10)
R 12.306(exc. VAT)
Temporarily out of stock
Siemens Rail Mount Fuse Holder for 14 x 51mm Fuse
  • RS stock no. 225-5389
  • Mfr. Part No. 3NC1491-5
Each (In a Pack of 6)
R 2,084.797(exc. VAT)
In Stock
RS PRO 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 277-3923
Each (In a Bag of 1000)
R 14.897(exc. VAT)
Temporarily out of stock
SIBA 325A White Automotive Car Fuse, 80V dc
  • RS stock no. 161-1827
  • Mfr. Part No. 9005805.325
Each (In a Box of 20)
R 132.624(exc. VAT)
In Stock
Better World
Siemens 5SV3 RCCB, 25A, 2 Pole, 30mA, Type A
  • RS stock no. 124-7727
  • Mfr. Part No. 5SV3312-6
Each
R 3,412.40(exc. VAT)
In Stock
Eaton 100A Bolted Tag Fuse, B1, 350 V dc, 660V ac, 111mm
  • RS stock no. 182-1665
  • Mfr. Part No. TC100
Each
R 1,263.85(exc. VAT)
Temporarily out of stock
Rockwell Automation 1492-SP 1492-SPM MCB, 1P, 15A Curve B
  • RS stock no. 218-8711
  • Mfr. Part No. 1492-SPM1B150
Each (In a Pack of 2)
R 458.735(exc. VAT)
In Stock
Littelfuse PCB Mount Fuse Holder for ATO Fuse, 80V dc
  • RS stock no. 787-4353
  • Mfr. Part No. 178.6164.0001
Each
R 86.86(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 16A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS stock no. 790-8866
  • Mfr. Part No. A9F44116
Each
R 679.84(exc. VAT)
Temporarily out of stock
ABB Surge Arrester, 20kA
  • RS stock no. 246-2248
  • Mfr. Part No. 2CCF606000R0001
Each
R 7,019.49(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)
In Stock
SIBA 6.3A F Glass Cartridge Fuse, 5 x 30mm
  • RS stock no. 361-8216
  • Mfr. Part No. 171530.6,3
Each (In a Pack of 10)
R 45.632(exc. VAT)
In Stock
Littelfuse 40A Orange Blade Car Fuse, 32V dc
  • RS stock no. 219-3570
  • Mfr. Part No. 0299040.TXN
Each (In a Pack of 10)
R 50.515(exc. VAT)
In Stock
Contactum MCB, 1P, 10A Curve C, 250V AC, 10 kA Breaking Capacity
  • RS stock no. 184-9028
  • Mfr. Part No. CPB1010C
Each
R 138.77(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 1610 Single Pole 32V dc Voltage Rating, 20A Current Rating
  • RS stock no. 409-902
  • Mfr. Part No. 1610-21-20A
Each
R 257.92(exc. VAT)
Currently unavailable
RS PRO 12.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 182-4034
Each (In a Pack of 5)
R 65.938(exc. VAT)
In Stock
SIBA 160A Centred Tag Fuse, NH1, 500V ac
  • RS stock no. 421-772
  • Mfr. Part No. 20-003-13/160A
Each
R 273.19(exc. VAT)
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