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

2320 of 999+
Temporarily out of stock
Better World
ABB, XT2V MCCB 4P 10A, Fixed Mount
  • RS Stock No. 236-7438
  • Mfr. Part No. 1SDA067701R1 XT2V 160 TMD 10A FF
Each
HK$9,409.42
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 1P 125A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9724
  • Mfr. Part No. 3VA1112-5ED12-0AA0
Each
HK$3,528.00
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 20A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6090
  • Mfr. Part No. A9P22620
Each
HK$291.60
Temporarily out of stock
Bourns 80A Tag Fuse, 38mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4234
  • Mfr. Part No. PF-NT5-80
Each (In a Box of 10)
HK$202.57
Temporarily out of stock
ABB S301 MCB, 1P, 32A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-293
  • Mfr. Part No. 2CDS381001R0324
Each
HK$742.15
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 1P, 100A Curve B, 230/400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-406
  • Mfr. Part No. 2CDS251001R0825
Each
HK$2,704.01
Temporarily out of stock
Eaton 35A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 182-1541
  • Mfr. Part No. 35NHG01B
Each (In a Box of 3)
HK$66.22
Temporarily out of stock
Eaton 125A Tag Fuse, 440V ac
  • RS Stock No. 261-434
  • Mfr. Part No. XS125
1 Pack of 10
HK$5,243.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 260-649
  • Mfr. Part No. 3VA6325-8HN41-0AA0
Each
HK$37,416.70
Temporarily out of stock
Hager HMB MCB, 4P, 100A, 400V AC, 15 Breaking Capacity
  • RS Stock No. 602-108
  • Mfr. Part No. HMB490
Each
HK$11,922.00
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 13A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 248-611
  • Mfr. Part No. 102168 FAZ-C13/2-NA
Each
HK$1,339.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 270-055
  • Mfr. Part No. 3VA6110-7JT41-2AA0
Each
HK$23,354.10
Temporarily out of stock
ABB 32A Tag Fuse, 125 x 40 x 60mm, 500V
  • RS Stock No. 250-4406
  • Mfr. Part No. 1SCA022697R3740
1 Box of 3
HK$782.44
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 20A Curve C, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 232-166
  • Mfr. Part No. 120645 FAZ-C20/2-NA-DC
Each
HK$2,325.18
Temporarily out of stock
Schneider Electric ComPact Auxiliary Contact for use with NS630b to NS3200
  • RS Stock No. 275-6654
  • Mfr. Part No. 33109
Each
HK$781.67
Temporarily out of stock
ABB SU200 M MCB, 1P, 20A Curve K, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-885
  • Mfr. Part No. 2CDS271337R0487
Each
HK$801.05
In Stock
RS PRO Industrial Surge Protector, 5kA, 40 V, DIN Rail Mount
  • RS Stock No. 101-766
Each
HK$770.88
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 125A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-8233
  • Mfr. Part No. LV426378
Each
HK$6,938.66
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 260-241
  • Mfr. Part No. 3VA6225-8KQ31-0AA0
Each
HK$32,729.20
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 16A Curve D, 12 → 133V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 790-8721
  • Mfr. Part No. A9F55416
Each
HK$1,266.90
1
2320
2364
Results per page

Related links