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

50690 Products showing for Fuses & Circuit Breakers

16 of 999+
In Stock
Keystone 30A PCB Mount Fuse Holder for 5.2 x 0.64mm Fuse, 500V ac
  • RS stock no. 160-3385
  • Mfr. Part No. 3522
Each (In a Pack of 100)
R 3.967(exc. VAT)
In Stock
Mersen 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-7268
  • Mfr. Part No. Y211552
Each (In a Pack of 10)
R 33.992(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS stock no. 776-2831
  • Mfr. Part No. A9XPT920
Each
R 345.91(exc. VAT)
In Stock
SIBA 20A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 783-3399
  • Mfr. Part No. 70-059-60/20A
Each (In a Pack of 10)
R 13.643(exc. VAT)
In Stock
Littelfuse 2A Grey Blade Car Fuse, 32V dc
  • RS stock no. 787-4117
  • Mfr. Part No. 0297002.WXNV
Each (In a Pack of 10)
R 5.073(exc. VAT)
Last RS stock
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 15A Current Rating
  • RS stock no. 782-7931
  • Mfr. Part No. W57-XB7A4A10-15
Each
R 69.11(exc. VAT)
In Stock
RS PRO 15A Blue Blade Car Fuse, 32V dc
  • RS stock no. 563-750
Each (In a Pack of 10)
R 9.025(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
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
Eaton 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 848-3040
  • Mfr. Part No. GMA-6-R
Each
R 9.03(exc. VAT)
Being discontinued
RS PRO 3.15A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-491
Each (In a Pack of 10)
R 6.648(exc. VAT)
In Stock
Selco Thermal Fuse +240°C 10 A, 250V ac
  • RS stock no. 111-7813
  • Mfr. Part No. SWTC-464-3535
Each (In a Pack of 10)
R 38.616(exc. VAT)
In Stock
Eaton 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 849-5541
  • Mfr. Part No. GDC-2A
Each
R 29.10(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 1A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-3433
  • Mfr. Part No. A9F74101
Each
R 388.71(exc. VAT)
In Stock
Littelfuse 30A Inline Fuse Holder for ATO Fuse, 32V dc
  • RS stock no. 337-5234
  • Mfr. Part No. FHAC0002LXN
Each (In a Pack of 5)
R 128.074(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 25A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS stock no. 790-8869
  • Mfr. Part No. A9F44125
Each
R 705.89(exc. VAT)
In Stock
Hager NEN MCB, 4P, 50A Curve B, 240 → 400V AC, 10 kA Breaking Capacity
  • RS stock no. 144-4704
  • Mfr. Part No. NEN450
Each
R 9,363.03(exc. VAT)
In Stock
Eaton 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1638
  • Mfr. Part No. S506-250-R
Each (In a Pack of 10)
R 10.171(exc. VAT)
In Stock
Schneider Electric EZ9 RCCB, 100A, 2 Pole, 30mA, Type A, 230V ac
  • RS stock no. 654-224
  • Mfr. Part No. EZ9R46291
Each
R 913.47(exc. VAT)
Being discontinued
RS PRO 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-677
Each (In a Pack of 10)
R 6.648(exc. VAT)
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