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

50674 Products showing for Fuses & Circuit Breakers

1 of 999+
Being discontinued
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-380
Each (In a Pack of 10)
R 4.105(exc. VAT)
In Stock
RS PRO 4A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 247-3961
Each (In a Pack of 10)
R 24.303(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-7938
  • Mfr. Part No. W57-XB7A4A10-5
Each
R 65.38(exc. VAT)
In Stock
RS PRO 30A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS stock no. 237-5265
Each
R 84.74(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 10A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-3446
  • Mfr. Part No. A9F77110
Each
R 272.22(exc. VAT)
In Stock
RS PRO RC Suppressor Circuit for use with Contactors
  • RS stock no. 277-8526
Each
R 182.65(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 1180 Single Pole 250V Voltage Rating DIN Rail Mount, 1A Current Rating
  • RS stock no. 458-8677
  • Mfr. Part No. 1180-01-1A
Each
R 286.16(exc. VAT)
In Stock
RS PRO 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 721-1601
Each (In a Pack of 10)
R 22.831(exc. VAT)
In Stock
RS PRO RC Suppressor Circuit for use with Contactors
  • RS stock no. 277-8527
Each
R 181.30(exc. VAT)
Being discontinued
RS PRO 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6057
Each (In a Pack of 10)
R 2.059(exc. VAT)
In Stock
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS stock no. 563-766
Each (In a Pack of 10)
R 8.965(exc. VAT)
In Stock
RS PRO Thermal Circuit Breaker - Single Pole 250V ac Voltage Rating Plug In, 1A Current Rating
  • RS stock no. 262-4261
1 Box of 2
R 1,102.52(exc. VAT)
In Stock
RS PRO Single Phase Industrial Surge Protector, 10kA, 1.1kV, DIN Rail Mount
  • RS stock no. 101-748
Each
R 568.50(exc. VAT)
In Stock
RS PRO Single Phase Industrial Surge Protector, 50kA, 1.25kV, DIN Rail Mount
  • RS stock no. 101-800
Each
R 765.41(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-0915
  • Mfr. Part No. W58-XB1A4A-5
Each
R 154.25(exc. VAT)
In Stock
SIBA 2A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS stock no. 267-3537
  • Mfr. Part No. 70-010-05/2A
Each (In a Pack of 5)
R 94.884(exc. VAT)
In Stock
RS PRO 10 A Panel Mount Fuse Holder, 1P for 5 x 20 mm, 250 V
  • RS stock no. 277-3909
Each (In a Pack of 5)
R 42.01(exc. VAT)
In Stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS stock no. 254-554
  • Mfr. Part No. 266626 NZM1-XHB
Each
R 2,365.06(exc. VAT)
In Stock
ETA Circuit Breaker Splash Cover
  • RS stock no. 150-063
  • Mfr. Part No. X201.285.01 3/8"106CLEARCOVER+NUT
Each
R 83.52(exc. VAT)
In Stock
ABB, Tmax XT MCCB 3P 100A, Breaking Capacity 36 kA, Panel Mount
  • RS stock no. 831-9172
  • Mfr. Part No. 1SDA067416R1 XT1N 160 TMD 100-1000 3p F F
Each
R 5,572.74(exc. VAT)
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