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

44 of 999+
In Stock
ETA ESX10 Electronic Circuit breaker 2A 24V ESX10-T, 1 channels , Plug-In Mounting
  • RS stock no. 210-2132
  • Mfr. Part No. ESX10-TB-101-DC24V-2A-E
Each
R 1,700.50(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3P, 25A, Type Z, 415V AC, 25 kA Breaking Capacity
  • RS stock no. 202-838
  • Mfr. Part No. 2CDS383001R0518
Each
R 3,956.42(exc. VAT)
In Stock
Eaton Fuse Holder Microswitch
  • RS stock no. 182-1727
  • Mfr. Part No. 170H0235
Each
R 838.21(exc. VAT)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 3A, 32V
  • RS stock no. 738-3264
  • Mfr. Part No. 0468003.NR
Each (In a Pack of 10)
R 19.10(exc. VAT)
In Stock
Schurter 630mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 167-8020
  • Mfr. Part No. 0034.3115
Each (In a Pack of 10)
R 9.355(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 6A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS stock no. 776-3385
  • Mfr. Part No. A9F76206
Each
R 3,144.91(exc. VAT)
Temporarily out of stock
Eaton 100A NH Fuse, 58 x 30 x 125mm, 500V ac
  • RS stock no. 248-670
  • Mfr. Part No. 100NHG0B
1 Pack of 3
R 536.36(exc. VAT)
In Stock
ABB, Pro M MCCB 3P 125A, Breaking Capacity 6 kA, DIN Rail Mount
  • RS stock no. 538-3849
  • Mfr. Part No. 2CDE283001R0125 E203/125R
Each
R 2,387.68(exc. VAT)
Temporarily out of stock
Mersen 2A FA Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 188-6861
  • Mfr. Part No. P093324
Each (In a Pack of 10)
R 99.244(exc. VAT)
Unavailable
Schneider Electric Acti 9 iK60N MCB, 3P, 32A Curve C, 400V AC, 6000 A Breaking Capacity
  • RS stock no. 776-8867
  • Mfr. Part No. A9K24332
Each
R 641.90(exc. VAT)
In Stock
Littelfuse 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V
  • RS stock no. 360-7250
  • Mfr. Part No. 8160000000
Each (In a Pack of 5)
R 27.304(exc. VAT)
Temporarily out of stock
Allen Bradley 1492-RCDA RCD, 40A, 2 Pole, 30mA, Type A
  • RS stock no. 218-8689
  • Mfr. Part No. 1492-RCDA2A40-US
Each
R 3,174.59(exc. VAT)
In Stock
Schneider Electric 1 Phase Distribution Board, 8 Way, 63 A
  • RS stock no. 301-8622
  • Mfr. Part No. 13398
Each
R 921.47(exc. VAT)
Temporarily out of stock
Socomec 100A Fuse Holder for 22.2 x 58mm Fuse, 2P
  • RS stock no. 252-3748
  • Mfr. Part No. 57035002
Each (In a Pack of 3)
R 967.85(exc. VAT)
In Stock
Better World
Schneider Electric Linergy Combination Block for use with TeSys GV2TeSys D
  • RS stock no. 219-9082
  • Mfr. Part No. GV2AF5
Each (In a Pack of 10)
R 160.733(exc. VAT)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 2.5A, 32V ac/dc
  • RS stock no. 820-7177
  • Mfr. Part No. 044002.5WR
Each (In a Pack of 100)
R 12.465(exc. VAT)
In Stock
Eaton 4A British Standard Fuse, A1, 550V, 44.5mm
  • RS stock no. 413-276
  • Mfr. Part No. NITD4
Each (In a Pack of 5)
R 65.928(exc. VAT)
Temporarily out of stock
Littelfuse 40A T Cartridge Fuse, 22 x 48mm
  • RS stock no. 878-3905
  • Mfr. Part No. CCMR040
Each
R 1,502.84(exc. VAT)
In Stock
Eaton 800mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1600
Each (In a Pack of 10)
R 12.815(exc. VAT)
In Stock
Siemens 4A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS stock no. 396-168
  • Mfr. Part No. 5SB221
Each (In a Pack of 5)
R 31.758(exc. VAT)
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