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

47290 Products showing for Fuses & Circuit Breakers

1 of 999+
Schurter 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4234
  • Mfr. Part No. 8020.5017.G
Each (In a Pack of 10)
HK$6.84(exc. GST)
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 20A Curve C, 415V AC, 65V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2359
  • Mfr. Part No. M9F22120
Each
HK$289.50(exc. GST)
Eaton 1A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 854-8878
  • Mfr. Part No. FNQ-R-1
Each
HK$393.60(exc. GST)
Better World
Siemens Sentron 5SY6 MCB, 1P, 3A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4945
  • Mfr. Part No. 5SY6103-7
Each
HK$183.00(exc. GST)
Littelfuse 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2788
  • Mfr. Part No. 0218001.MXP
Each (In a Pack of 10)
HK$5.59(exc. GST)
ABB Surge Protector, DIN Rail Mount
  • RS Stock No. 136-3855
  • Mfr. Part No. 1SNA295395R2400
Each
HK$29.61(exc. GST)
Eaton 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7049
  • Mfr. Part No. MDA-12-R
Each
HK$51.80(exc. GST)
ABB RCBO, 16A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 231-9957
  • Mfr. Part No. 2CSR256140R1164 DS203NC C16 A30
Each
HK$1,811.70(exc. GST)
RS PRO 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6079
Each (In a Pack of 10)
HK$4.41(exc. GST)
SIBA 500mA M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3464
  • Mfr. Part No. 70-010-05/0.5A
Each (In a Pack of 5)
HK$48.66(exc. GST)
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 32A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2361
  • Mfr. Part No. M9F22132
Each
HK$301.40(exc. GST)
RS PRO 3A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6082
Each (In a Pack of 10)
HK$5.807(exc. GST)
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 5A Current Rating
  • RS Stock No. 333-265
  • Mfr. Part No. 201-5A
Each
HK$321.50(exc. GST)
Bourns 1.85A Resettable Fuse, 15V
  • RS Stock No. 245-9147
  • Mfr. Part No. MF-LSMF185X-2
Each (On a Tape of 10)
HK$3.00(exc. GST)
RS PRO 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-463
Each (In a Pack of 10)
HK$3.31(exc. GST)
Bourns 1.25A Resettable Fuse, 15V
  • RS Stock No. 245-9137
  • Mfr. Part No. MF-LSMF125X-2
Each (On a Tape of 10)
HK$2.48(exc. GST)
Bourns 1.5A Resettable Fuse, 15V
  • RS Stock No. 647-8112
  • Mfr. Part No. MF-SM150-2
Each (In a Pack of 10)
HK$2.66(exc. GST)
RS PRO 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-435
Each (In a Pack of 10)
HK$3.31(exc. GST)
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 16A Curve B, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2333
  • Mfr. Part No. M9F21116
Each
HK$104.40(exc. GST)
Bourns 1.5A Resettable Fuse, 15V
  • RS Stock No. 691-7591
  • Mfr. Part No. MF-SMDF150-2
Each (In a Pack of 5)
HK$3.60(exc. GST)
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