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

41 of 999+
In Stock
Littelfuse 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 894-9593
  • Mfr. Part No. 04773.15MXP
Each (In a Pack of 5)
R 36.118(exc. VAT)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 1.5A, 125V ac/dc
  • RS stock no. 541-3271
  • Mfr. Part No. 025101.5HAT1L
Each (In a Pack of 10)
R 19.336(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 32A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS stock no. 211-2361
  • Mfr. Part No. M9F22132
Each
R 709.26(exc. VAT)
In Stock
Littelfuse 9A Resettable Fuse, 30V dc
  • RS stock no. 517-6893
  • Mfr. Part No. RUEF900
Each (In a Pack of 10)
R 20.61(exc. VAT)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 4A, 250V ac
  • RS stock no. 769-3347
  • Mfr. Part No. SS-5-4A-BK
Each (In a Pack of 5)
R 17.014(exc. VAT)
Limited stock
Hager 1 Phase Busbar
  • RS stock no. 144-4829
  • Mfr. Part No. KB163P
Each
R 195.80(exc. VAT)
In Stock
RS PRO F, T Fuse Kit
  • RS stock no. 893-8543
Each
R 3,490.62(exc. VAT)
In Stock
Eaton 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 171-6768
  • Mfr. Part No. S505H-6.3-R
Each (In a Pack of 5)
R 12.08(exc. VAT)
In Stock
Eaton 315A British Standard Fuse, LMT, 240V ac, 59mm
  • RS stock no. 182-1413
  • Mfr. Part No. 315LMT
Each
R 847.64(exc. VAT)
In Stock
ABB RCBO, 10A Current Rating, 4P Poles, 30mA Trip Sensitivity
  • RS stock no. 231-9953
  • Mfr. Part No. 2CSR256040R1104 DS203NC C10 AC30
Each
R 3,878.81(exc. VAT)
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 800A, Fixed Mount
  • RS stock no. 232-0134
  • Mfr. Part No. 1SDA060268R1 T6N800 FF PR221-LS/I 800A
Each
R 56,760.15(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 8A, 125V
  • RS stock no. 738-2873
  • Mfr. Part No. 0154008.DR
Each (In a Pack of 10)
R 30.135(exc. VAT)
In Stock
Littelfuse 800mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4482
  • Mfr. Part No. 0216.800MXP
Each (In a Pack of 10)
R 32.698(exc. VAT)
Temporarily out of stock
RS PRO 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 188-4480
1 Box of 2000
R 106,931.30(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 3m, 40A, Canalis Series
  • RS stock no. 211-0365
  • Mfr. Part No. KBA40ED4300W
Each (In a Pack of 6)
R 2,314.195(exc. VAT)
In Stock
RS PRO 32A Cartridge Fuse, 13 x 29mm
  • RS stock no. 413-850
Each (In a Pack of 10)
R 43.302(exc. VAT)
In Stock
Littelfuse 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4583
  • Mfr. Part No. 0218.400MXP
Each (In a Pack of 10)
R 27.483(exc. VAT)
In Stock
Siemens 4A T Cartridge Fuse, 5 x 20mm
  • RS stock no. 271-3211
  • Mfr. Part No. 8WA1822-7EF83
Each (In a Pack of 10)
R 33.095(exc. VAT)
In Stock
Schurter Thermal Circuit Breaker - TA45 2 Pole 60 V dc, 240V ac Voltage Rating Panel Mount, 10A Current Rating
  • RS stock no. 868-9169
  • Mfr. Part No. 4430.2078
Each
R 580.85(exc. VAT)
In Stock
Eaton 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1010
Each (In a Pack of 10)
R 10.917(exc. VAT)
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