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

40 of 999+
In Stock
RS PRO MCB, 2P, 16A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0160
Each
HK$188.70
In Stock
Eaton 5A F Glass Cartridge Fuse, 6.4 x 15.9mm
  • RS Stock No. 851-1514
  • Mfr. Part No. AGA-5
Each
HK$24.30
Temporarily out of stock
ABB RCBO, 16A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5209
  • Mfr. Part No. 2CSR274101R1165
Each
HK$3,453.99
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 3P 400A, DIN Rail Mount
  • RS Stock No. 224-7916
  • Mfr. Part No. 3VA2340-5HL32-0AA0
Each
HK$15,452.90
In Stock
Schneider Electric Resi9 R9PF MCB, 3P, 10A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8966
  • Mfr. Part No. R9PFC710
Each
HK$873.59
Temporarily out of stock
Siemens SENTRON Trip Alarm Switch for use with 3VA4/5/6
  • RS Stock No. 155-291
  • Mfr. Part No. 3VA9978-0AB12
Each
HK$391.70
In Stock
Schurter 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7485
  • Mfr. Part No. 0034.3110
Each (In a Pack of 10)
HK$5.35
Temporarily out of stock
Eaton IZMX40B3-P20W-1 Electronic Circuit Breaker 2kA , DIN Rail
  • RS Stock No. 132-831
  • Mfr. Part No. 183591 IZMX40B3-P20W-1
Each
HK$154,491.81
In Stock
Littelfuse 175A Grey, White CF Car Fuse, 58V dc
  • RS Stock No. 337-7965
  • Mfr. Part No. 155.0892.6171
Each
HK$91.10
Temporarily out of stock
Eaton 63A Rail Mount Fuse Holder for F2 Fuse, 1P, 660V ac
  • RS Stock No. 247-9492
  • Mfr. Part No. 63ENSF
Each
HK$199.50
In Stock
Eaton 1A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2696
  • Mfr. Part No. ABC-1-R
Each
HK$33.10
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 40A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS Stock No. 790-8872
  • Mfr. Part No. A9F44140
Each
HK$171.50
Temporarily out of stock
Siemens SENTRON Conversion Kit for use with 3VA1 250
  • RS Stock No. 210-9324
  • Mfr. Part No. 3VA9213-0KP10
Each
HK$825.20
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-255
  • Mfr. Part No. 3VA5320-5GC41-0AA0
Each
HK$12,000.20
Temporarily out of stock
Siemens SENTRON Busbar
  • RS Stock No. 627-044
  • Mfr. Part No. 5ST2600
1 Pack of 10
HK$1,423.80
In Stock
Better World
Schneider Electric iID RCCB, 25A, 4 Pole, 300mA
  • RS Stock No. 734-9352
  • Mfr. Part No. A9R14425
Each
HK$2,084.15
Temporarily out of stock
Better World
Schneider Electric Acti9 iID RCCB, 25A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 218-3910
  • Mfr. Part No. A9Z61425
Each
HK$7,527.20
Temporarily out of stock
Better World
Schneider Electric
  • RS Stock No. 125-1383
  • Mfr. Part No. A9C70122
Each
HK$2,541.30
Temporarily out of stock
Better World
Siemens SENTRON 3VA9 Terminal for use with 3VA1 400/630, 3VA2 400/630
  • RS Stock No. 218-1861
  • Mfr. Part No. 3VA9483-0JA13
Each
HK$861.60
In Stock
Schneider Electric 1 Phase Distribution Board, 2 Way, 63 A
  • RS Stock No. 301-8600
  • Mfr. Part No. 13392
Each
HK$103.90
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