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

47265 Products showing for Fuses & Circuit Breakers

72 of 999+
ABB S-ARC1 M MCB, 1+N, 10A Curve C, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 175-9934
  • Mfr. Part No. 2CSA275901R9104 S-ARC1 M C10
Each
HK$2,078.78
Eaton 63A Rail Mount Fuse Holder, 1P, 690V ac
  • RS Stock No. 182-1500
  • Mfr. Part No. RS63PH
Each (In a Box of 10)
HK$1,363.65
Littelfuse 1A Resettable Fuse, 30V dc
  • RS Stock No. 657-1772
  • Mfr. Part No. RHEF100
Each (In a Pack of 5)
HK$3.76
Eaton 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7058
  • Mfr. Part No. MDA-15-R
Each
HK$33.10
ABB Tmax XT Shunt Opening Release for use with Tmax XT
  • RS Stock No. 237-6053
  • Mfr. Part No. 1SDA066333R1 SOR-C XT2-XT4 W 380-440VAC
Each
HK$932.80
Eaton 25A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8759
  • Mfr. Part No. STD25
Each
HK$83.40
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 300mA, Type A
  • RS Stock No. 124-7744
  • Mfr. Part No. 5SV3646-6KK12
Each
HK$1,773.10
Littelfuse SMD Non Resettable Fuse 1A, 125V ac/dc
  • RS Stock No. 541-3388P
  • Mfr. Part No. 0451001.MRL
Each (Supplied on a Reel)
HK$8.71
ETA Cover for use with 9510
  • RS Stock No. 723-4840
  • Mfr. Part No. X200.801.08 M12 CLEAR COVER+PLATED NUT
Each
HK$123.00
Littelfuse PC Board Non Resettable Fuse, Axial 7A, 125V ac/dc
  • RS Stock No. 541-3316
  • Mfr. Part No. 0251007.HAT1L
Each (In a Pack of 10)
HK$6.60
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 25A Current Rating
  • RS Stock No. 782-7994
  • Mfr. Part No. W58-XC4C12A-25
Each
HK$53.30
RS PRO 250mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6060
Each (In a Pack of 10)
HK$4.99
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)
HK$11.30
Schneider Electric Acti9 Acti9 iC60 MCB, 1P, 3A Curve D, 50 kA Breaking Capacity
  • RS Stock No. 130-442
  • Mfr. Part No. A9F75103
Each
HK$1,207.62
Better World
Schneider Electric Mounting Plate for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1178
  • Mfr. Part No. LV429283
Each
HK$1,068.84
Better World
Siemens SENTRON 5SY4 MCB, 1P, 80A Curve B, 400V AC, 72V DC
  • RS Stock No. 212-8950
  • Mfr. Part No. 5SY4180-6
Each
HK$592.30
Eaton 80A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 182-1715
  • Mfr. Part No. 170M3811D
Each
HK$3,271.30
Schneider Electric Terminal for use with Compact INS, Compact INSE Circuit Breaker
  • RS Stock No. 247-1718
  • Mfr. Part No. 28948
Each
HK$453.20
Rittal Earthing Strap, 16mm² Wire Range
  • RS Stock No. 263-3736
  • Mfr. Part No. 2568000
Each (In a Pack of 5)
HK$81.96
Contactum MCB, 1P, 10A Curve C, 250V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9028
  • Mfr. Part No. CPB1010C
Each
HK$44.90
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