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

33 of 999+
In Stock
RS PRO 8A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-497
Each (In a Pack of 10)
R 8.585(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS stock no. 767-5049
Each (In a Pack of 10)
R 5.855(exc. VAT)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 5A, 125V ac/dc
  • RS stock no. 541-3300
  • Mfr. Part No. 0251005.NRT1L
Each (In a Pack of 10)
R 26.697(exc. VAT)
In Stock
Littelfuse 25A White Blade Car Fuse, 32V dc
  • RS stock no. 787-4154P
  • Mfr. Part No. 0287025.PXCN
Each (Supplied in a Bag)
R 5.788(exc. VAT)
In Stock
Eaton Handle, Lockable for use with N(S)2(-4) Series, NZM2(-4) Switch, PN2(-4) Series
  • RS stock no. 537-5719
  • Mfr. Part No. 260174 NZM2-XTVDV
Each
R 2,460.77(exc. VAT)
In Stock
Siemens 230V ac Undervoltage Release Circuit Trip for use with 3RV2 Series Circuit Breakers
  • RS stock no. 706-1939
  • Mfr. Part No. 3RV2902-1AP0
Each
R 739.98(exc. VAT)
In Stock
Allen Bradley 1492 1492-SPM MCB, 1P, 2A Curve C, 277V AC, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 125-1452
  • Mfr. Part No. 1492-SPM1C020
Each
R 521.85(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS stock no. 746-7873
  • Mfr. Part No. 2CDS252001R0401 S202-D40
Each
R 1,206.33(exc. VAT)
In Stock
SIBA 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 783-3305
  • Mfr. Part No. 70-007-65/1.6A
Each (In a Pack of 10)
R 13.376(exc. VAT)
In Stock
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 610-9838
Each (In a Pack of 10)
R 11.273(exc. VAT)
In Stock
SIBA 35A Centred Tag Fuse, NH000, 500V ac
  • RS stock no. 421-671
  • Mfr. Part No. 20-000-13/35E1
Each (In a Pack of 3)
R 179.613(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 4A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS stock no. 746-7703
  • Mfr. Part No. 2CDS252001R0044 S202-C4
Each
R 1,179.49(exc. VAT)
In Stock
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-598
Each (In a Pack of 10)
R 6.867(exc. VAT)
In Stock
RS PRO 1.25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 769-6330
Each (In a Pack of 10)
R 20.871(exc. VAT)
Being discontinued
RS PRO 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-671
Each (In a Pack of 10)
R 6.648(exc. VAT)
Last RS stock
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-7821
  • Mfr. Part No. W57-XB1A7A10-5
Each
R 89.98(exc. VAT)
In Stock
RS PRO 3A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 413-210
Each (In a Pack of 10)
R 24.303(exc. VAT)
In Stock
Schneider Electric TransferPacT Electronic Circuit Breaker 63A TA100, Fixed
  • RS stock no. 272-7579
  • Mfr. Part No. TA10D2S0633TPE
Each
R 29,467.80(exc. VAT)
In Stock
Spelsberg Consumer Unit
  • RS stock no. 548-8219
  • Mfr. Part No. 735-536/21
Each
R 4,092.05(exc. VAT)
In Stock
Littelfuse 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 738-3172
  • Mfr. Part No. 0KLK001.T
Each
R 451.80(exc. VAT)
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