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

50686 Products showing for Fuses & Circuit Breakers

30 of 999+
Limited stock
ABB SN201 MCB, 1+N, 20A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS stock no. 186-3472
  • Mfr. Part No. 2CSS245102R0204
Each
R 273.92(exc. VAT)
In Stock
Littelfuse 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4432
  • Mfr. Part No. 021706.3MXP
Each (In a Pack of 10)
R 8.082(exc. VAT)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 20 kA, Fixed Mount
  • RS stock no. 232-0085
  • Mfr. Part No. 1SDA054325R1 T5N400 FF PR221-LS 400A
Each
R 39,086.39(exc. VAT)
Being discontinued
RS PRO 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-479
Each (In a Pack of 10)
R 6.648(exc. VAT)
In Stock
Eaton 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 703-8399
  • Mfr. Part No. C10G16
Each (In a Pack of 10)
R 27.052(exc. VAT)
In Stock
ABB F200 RCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS stock no. 488-6915
  • Mfr. Part No. 2CSF202101R1250 - F202A-25/0.03
Each
R 2,121.84(exc. VAT)
Temporarily out of stock
Littelfuse 50A Blade Fuse Car Fuse, 32V ac/dc
  • RS stock no. 878-3249
  • Mfr. Part No. 0MID050.X
Each
R 112.69(exc. VAT)
In Stock
Eaton 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 412-324
  • Mfr. Part No. TDC10-10A
Each (In a Pack of 10)
R 14.739(exc. VAT)
In Stock
Wickmann 35A Green Blade Car Fuse, 32V dc
  • RS stock no. 174-0720
  • Mfr. Part No. 0287035.PXCN
Each (In a Pack of 50)
R 6.074(exc. VAT)
In Stock
Eaton 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1256
  • Mfr. Part No. S500-400-R
Each (In a Pack of 10)
R 7.523(exc. VAT)
Being discontinued
RS PRO 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-425
Each (In a Pack of 10)
R 6.841(exc. VAT)
Being discontinued
Wurth Elektronik 10A Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 283-6464
  • Mfr. Part No. 696212000000
Each
R 29.60(exc. VAT)
In Stock
Finder Busbar
  • RS stock no. 386-4453
  • Mfr. Part No. 093.20
Each
R 102.44(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
ETI 25A D02 Neozed Fuse, E18 Thread Size, gG, 400V ac
  • RS stock no. 415-991
  • Mfr. Part No. 2212002
Each (In a Pack of 5)
R 19.49(exc. VAT)
In Stock
SIBA 100A White Automotive Car Fuse, 80V dc
  • RS stock no. 161-1831
  • Mfr. Part No. 9005805.100
Each
R 115.39(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
Bulgin 10A Inline Fuse Holder for 5 x 20mm Fuse, 250V
  • RS stock no. 208-8269
  • Mfr. Part No. FX0380/BK
Each (In a Pack of 2)
R 135.945(exc. VAT)
Limited stock
SIBA 500A White Automotive Car Fuse, 80V dc
  • RS stock no. 161-1839
  • Mfr. Part No. 9005805.500
Each
R 169.70(exc. VAT)
In Stock
RS PRO 6.3A Inline Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 277-3920
Each (In a Pack of 5)
R 22.21(exc. VAT)
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