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

22 of 999+
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 125V ac/dc
  • RS stock no. 878-1741
  • Mfr. Part No. 0273001.H
Each
R 121.47(exc. VAT)
In Stock
RS PRO 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3473
Each (In a Pack of 10)
R 3.89(exc. VAT)
In Stock
Schurter OGN Series Thermoplastic PCB Mount Fuse Holder Cover for 5 x 20mm Fuse, IP00
  • RS stock no. 173-9731
  • Mfr. Part No. 0853.0551
Each (In a Bag of 100)
R 8.642(exc. VAT)
Temporarily out of stock
SIBA 325A White Automotive Car Fuse, 80V dc
  • RS stock no. 161-1827
  • Mfr. Part No. 9005805.325
Each (In a Box of 20)
R 132.624(exc. VAT)
In Stock
3M 20A Inline Fuse Holder for 19mm Fuse, 32V
  • RS stock no. 237-2879
  • Mfr. Part No. 7000006228
Each (In a Pack of 5)
R 10.192(exc. VAT)
In Stock
Littelfuse 210A Base Mount Fuse Holder for ATO Fuse
  • RS stock no. 894-9622
  • Mfr. Part No. PDM61001ZXM
Each
R 565.73(exc. VAT)
In Stock
Eaton 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 458-8504
  • Mfr. Part No. KTK-1
Each (In a Pack of 5)
R 316.488(exc. VAT)
In Stock
Phoenix Contact Busbar, 6.2mm Pitch
  • RS stock no. 627-3406
  • Mfr. Part No. 3030271
Each (In a Pack of 5)
R 99.39(exc. VAT)
In Stock
ABB Tmax XT Rod for use with Circuit Breaker
  • RS stock no. 232-0193
  • Mfr. Part No. 1SDA066576R1 RHE_S XT1..4 500MM
Each
R 481.87(exc. VAT)
Temporarily out of stock
Allen Bradley 1492-D2 1492-D MCB, 2P, 25A Curve C, 10 kA Breaking Capacity
  • RS stock no. 218-8559
  • Mfr. Part No. 1492-D2C250
Each
R 2,318.71(exc. VAT)
Temporarily out of stock
Siemens SENTRON Door Feedthrough Accessory for use with 3KE42, 3KE43, 3KE44, 3KE45
  • RS stock no. 266-482
  • Mfr. Part No. 8UC7414-1BF44
Each
R 4,962.03(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 6A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS stock no. 790-8850
  • Mfr. Part No. A9F44106
Each
R 717.03(exc. VAT)
In Stock
RS PRO 25A Natural Blade Car Fuse, 32V dc
  • RS stock no. 563-794
Each (In a Pack of 10)
R 9.025(exc. VAT)
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS stock no. 231-9327
  • Mfr. Part No. 1SDA100345R1 XT5N 400 TMA 400-4000 3pFF
Each
R 20,767.48(exc. VAT)
In Stock
RS PRO 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3518
Each (In a Pack of 10)
R 8.951(exc. VAT)
Temporarily out of stock
RS PRO 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 668-6017
Each (In a Pack of 10)
R 12.831(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 16A Curve C, 10 kA Breaking Capacity
  • RS stock no. 214-2066
  • Mfr. Part No. M9F11216
Each
R 1,970.18(exc. VAT)
In Stock
Better World
Schneider Electric Acti9 Acti9 iDT40K MCB, 1+N, 10A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS stock no. 238-3411
  • Mfr. Part No. A9P71610
Each
R 675.79(exc. VAT)
In Stock
Littelfuse 300A Grey, White CF Car Fuse, 58V dc
  • RS stock no. 337-7993
  • Mfr. Part No. 155.0892.6301
Each
R 234.14(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-0886
  • Mfr. Part No. W23-X1A1G-5
Each
R 829.99(exc. VAT)
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