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

56 of 999+
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5182
  • Mfr. Part No. 3VA2163-6KP46-0AA0
Each
HK$17,648.50
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3809
  • Mfr. Part No. 3VA2040-8JP46-0AA0
Each
HK$17,847.10
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 25 kA
  • RS Stock No. 209-6811
  • Mfr. Part No. 3VA1140-3ED32-0AA0
Each
HK$2,814.20
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 36 kA
  • RS Stock No. 209-6975
  • Mfr. Part No. 3VA1116-4EF42-0AA0
Each
HK$10,836.10
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 209-5261
  • Mfr. Part No. 3VA5112-4EC31-0AA0
Each
HK$8,758.10
Socomec 1A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 172-3016
  • Mfr. Part No. 60120001
Each (In a Box of 10)
HK$12.42
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3910
  • Mfr. Part No. 3VA2063-8KP36-0AA0
Each
HK$17,970.60
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 36 kA
  • RS Stock No. 209-6755
  • Mfr. Part No. 3VA1112-4EE42-0AA0
Each
HK$8,255.10
Siemens Busbar
  • RS Stock No. 203-3278
  • Mfr. Part No. 8US1251-5DM07
Each (In a Pack of 6)
HK$358.167
Eaton 400A British Standard Fuse, C1, 660V, 133mm
  • RS Stock No. 182-1460
  • Mfr. Part No. TM400
Each
HK$5,742.20
Better World
Siemens SENTRON 5SL4 MCB, 2P, 8A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-7442
  • Mfr. Part No. 5SL4208-7
Each
HK$779.70
Better World
Siemens SENTRON 5SL4 MCB, 2P, 1.6A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-7445
  • Mfr. Part No. 5SL4215-7
Each
HK$779.70
Better World
ABB System Pro M Compact S200 MCB, 3P, 50A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7618
  • Mfr. Part No. 2CDS253001R0505 S203-B50
Each
HK$557.80
RS PRO MCB, 1P, 3A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0191
Each
HK$82.40
Better World
Schneider Electric, Compact MCCB 3P 40A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-8058
  • Mfr. Part No. LV426103
Each
HK$2,475.13
ABB RCBO, 25A Current Rating, 3P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 767-4428
  • Mfr. Part No. 2CSR273001R1254 DS203 M AC-C25/0,03
Each
HK$2,717.92
Littelfuse 20A Inline Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 724-3190P
  • Mfr. Part No. 0FHA0001ZXJ
Each (Supplied in a Box)
HK$41.30
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 600V ac
  • RS Stock No. 182-1655
  • Mfr. Part No. CHCC2DU
Each
HK$543.00
Schneider Electric Thermal Circuit Breaker - GB2 1P + N Pole 250V ac Voltage Rating DIN Rail Mount, 3A Current Rating
  • RS Stock No. 323-9015
  • Mfr. Part No. GB2CD08
Each
HK$307.40
ABB RCBO, 10A Current Rating, 4P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9953
  • Mfr. Part No. 2CSR256040R1104 DS203NC C10 AC30
Each
HK$1,485.10
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