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

17 of 999+
In Stock
Eaton 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 703-8386
  • Mfr. Part No. C10G10
Each (In a Pack of 10)
R 27.052(exc. VAT)
In Stock
Siemens Fuse Holder NEOZED Screw Cap
  • RS stock no. 202-7180
  • Mfr. Part No. 5SH4363
Each (In a Pack of 20)
R 69.98(exc. VAT)
Limited stock
Limitor Thermal Fuse +97°C 2 A, 250V ac
  • RS stock no. 116-114
  • Mfr. Part No. SM 092 A0 2A
1 Pack of 5
R 124.52(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron Circuit breaker 3P 400A, DIN Rail Mount
  • RS stock no. 196-3582
  • Mfr. Part No. 3VA63251MS310AA0
Each
R 34,966.03(exc. VAT)
In Stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS stock no. 874-4159
  • Mfr. Part No. 3VA1110-4EF36-0AA0
Each
R 6,297.44(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA2, 3 channels
  • RS stock no. 156-637
  • Mfr. Part No. 3VA2463-8HK32-0AA0
Each
R 50,486.06(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
Littelfuse 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4375
  • Mfr. Part No. 0217001.MXP
Each (In a Pack of 10)
R 8.079(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS stock no. 782-0892
  • Mfr. Part No. W58-XB1A4A-10
Each
R 176.32(exc. VAT)
In Stock
RS PRO 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 563-756
Each (In a Pack of 25)
R 15.805(exc. VAT)
In Stock
Eaton 10A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS stock no. 412-598
  • Mfr. Part No. TDC180-10A
Each (In a Pack of 10)
R 12.467(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 25A Curve C, 250V DC, 20 kA Breaking Capacity
  • RS stock no. 776-3171
  • Mfr. Part No. A9N61513
Each
R 657.72(exc. VAT)
In Stock
Eaton RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS stock no. 227-0738
  • Mfr. Part No. 267448 PFGM-63/2/003-A
Each
R 1,707.90(exc. VAT)
In Stock
RS PRO 10A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-520
Each (In a Pack of 10)
R 8.555(exc. VAT)
In Stock
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS stock no. 769-0170
  • Mfr. Part No. 03453LF1H
Each
R 108.99(exc. VAT)
In Stock
Eaton 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 310-9841
  • Mfr. Part No. HTC-30M
Each (In a Pack of 5)
R 53.278(exc. VAT)
In Stock
Eaton 500mA F Glass Cartridge Fuse, 6.3 x 25mm
  • RS stock no. 851-1485
  • Mfr. Part No. AGX-1-2
Each
R 92.10(exc. VAT)
Temporarily out of stock
Eaton 160A Bolted Tag Fuse, 415V ac, 92mm
  • RS stock no. 181-8853
  • Mfr. Part No. 160MJ31-7
Each
R 1,479.95(exc. VAT)
In Stock
Littelfuse 60A Inline Fuse Holder for Maxi Fuse, 32V dc
  • RS stock no. 787-4388P
  • Mfr. Part No. MAHC0001ZXJ
Each (Supplied in a Bag)
R 557.10(exc. VAT)
In Stock
Littelfuse Automotive Fuse Kit
  • RS stock no. 219-9562
  • Mfr. Part No. 00950011XXN
Each
R 1,101.89(exc. VAT)
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