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

2309 of 999+
Temporarily out of stock
Bourns Surface Mount Fuse 3A, 50 V dc, 63 V dc
  • RS Stock No. 245-9203
  • Mfr. Part No. SF-0603SPA300R-2
Each (On a Reel of 5000)
HK$4.839
In Stock
Mersen 32A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7432
  • Mfr. Part No. F212594
Each (In a Pack of 10)
HK$34.86
Temporarily out of stock
Mersen 315A Bolted Tag Fuse, B3X, 240 V dc, 415V ac, 133mm
  • RS Stock No. 178-1073
  • Mfr. Part No. D226323 / BTKM42V315
Each
HK$316.30
Temporarily out of stock
Eaton 10A Cartridge Fuses, 63.5 x 359mm
  • RS Stock No. 247-840
  • Mfr. Part No. 12OHGMA10
1 Pack of 3
HK$7,942.00
Temporarily out of stock
RCBO, 13A Current Rating, 1+N Poles, 30mA Trip Sensitivity, Type C, xEffect Range
  • RS Stock No. 252-751
  • Mfr. Part No. 193482 FRBmM-C13/1N/003-F
Each
HK$2,380.98
Temporarily out of stock
ABB Tmax Shunt Opening Release for use with Tmax XT
  • RS Stock No. 237-6004
  • Mfr. Part No. 1SDA062070R1 T7-M-X1 250VAC/DC
Each
HK$1,372.10
Temporarily out of stock
Schneider Electric Compact Guide Frame for use with NS630b
  • RS Stock No. 354-484
  • Mfr. Part No. 33282
Each
HK$56,213.43
Temporarily out of stock
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 50A
  • RS Stock No. 221-0896
  • Mfr. Part No. BDL36050LU
Each
HK$4,912.20
In Stock
Mersen 20A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2733
  • Mfr. Part No. E212593
1 Box of 10
HK$717.81
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Dip LSI, 4 / f channels
  • RS Stock No. 259-3960
  • Mfr. Part No. 1SDA072013R1
Each
HK$498,144.89
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA1 Molded Case Circuit Breakers
  • RS Stock No. 628-854
  • Mfr. Part No. 8GK6733-2KK23
Each
HK$1,905.12
Temporarily out of stock
xEffect MCB, 3P, 100A Curve C, 400V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 252-934
  • Mfr. Part No. 211806 AZ-3-C100
Each
HK$4,148.11
Temporarily out of stock
ABB SU200 M MCB, 1P, 25A, Type Z, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-603
  • Mfr. Part No. 2CDS271337R0518
Each
HK$981.64
Temporarily out of stock
ABB SU200 M MCB, 2P, 1A Curve C, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-029
  • Mfr. Part No. 2CDS272337R0014
Each
HK$1,994.87
Temporarily out of stock
ABB SU200 M MCB, 4P, 750mA Curve K, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-116
  • Mfr. Part No. 2CDS274337R0187
Each
HK$4,662.06
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 16A Curve B, 10 kA Breaking Capacity
  • RS Stock No. 202-7185
  • Mfr. Part No. 5SL4316-6
Each
HK$730.40
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 1A, Type Z, 240V AC, 72V DC, 100 kA Breaking Capacity
  • RS Stock No. 204-222
  • Mfr. Part No. 2CDS381103R0218
Each
HK$2,178.89
Temporarily out of stock
ABB S301 MCB, 1P, 4A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-725
  • Mfr. Part No. 2CDS381001R0041
Each
HK$1,132.26
Temporarily out of stock
ABB S302 MCB, 2P, 32A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-311
  • Mfr. Part No. 2CDS382001R0325
Each
HK$1,941.02
Temporarily out of stock
Hager Hager MMN Circuit Breaker, 4P, 630mA, Type AC, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-887
  • Mfr. Part No. MMN400
Each
HK$6,014.80
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