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

74 of 999+
Eaton 60A Ceramic Cartridge Fuse, 23 x 57mm
  • RS Stock No. 182-1483
  • Mfr. Part No. 60KR85
Each (In a Box of 20)
HK$60.475
Mersen 25A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0588
  • Mfr. Part No. G1017204 / FR14GR69V25
Each
HK$169.70
ABB RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9931
  • Mfr. Part No. 2CSR255151R1104 DSE201 C10 A30
Each
HK$667.86
Better World
ABB System Pro M Compact S200 MCB, 1P, 50A Curve D, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 527-9526
  • Mfr. Part No. 2CDS251001R0501 S201-D50
Each
HK$167.00
Better World
Siemens RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 225-8764
  • Mfr. Part No. 5SU1356-0KK16
Each
HK$1,508.10
Better World
ABB System Pro M Compact S200 MCB, 1P, 15A Curve K
  • RS Stock No. 237-3185
  • Mfr. Part No. 2CDS251001R0457
Each
HK$335.70
Schneider Electric A9R3 RCCB, 63A, 2 Pole, 30mA, Type A-SI, 240V ac
  • RS Stock No. 276-8739
  • Mfr. Part No. A9R31263
Each
HK$4,358.24
Siemens Single Phase Industrial Surge Protection, 2A, 230V (Volts), DIN Rail Mount
  • RS Stock No. 266-9580
  • Mfr. Part No. 5SY1704-4
Each
HK$286.60
Better World
ABB, XT4S MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6779
  • Mfr. Part No. 1SDA068504R1 XT4S 160 Ekip LSI 160A FF
Each
HK$15,736.90
RS PRO 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1563
Each (In a Pack of 10)
HK$16.60
Schurter Non-Resettable Wire Ended Fuse 2A, 250V ac
  • RS Stock No. 703-2629
  • Mfr. Part No. 8020.0517.PT
Each (In a Pack of 10)
HK$3.37
Better World
Siemens 3VA9 RCD, 250A, 4 Pole, Type A
  • RS Stock No. 210-3524
  • Mfr. Part No. 3VA9214-0RL20
Each
HK$9,283.60
ABB System Pro M Compact S200M MCB, 1P, 10A Curve B, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-5989
  • Mfr. Part No. 2CDS271001R0105 S201M-B10
Each
HK$152.10
ETA Thermal Circuit Breaker - 1410-G1 Single Pole 250V Voltage Rating Panel Mount, 1A Current Rating
  • RS Stock No. 729-2704
  • Mfr. Part No. 1410-G111-P2F1-S01-1A
Each
HK$153.70
Schneider Electric RCBO, 10A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 130-444
  • Mfr. Part No. A9D55410
Each
HK$8,625.26
Better World
Schneider Electric, Compact MCCB 3P 50A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7769
  • Mfr. Part No. LV426504
Each
HK$3,584.14
SIBA SMD Non Resettable Fuse 5A, 250V
  • RS Stock No. 736-8700P
  • Mfr. Part No. 160016.5
Each (Supplied on a Reel)
HK$127.80
NEMIQ Earthing Strap Copper
  • RS Stock No. 288-4617
  • Mfr. Part No. JF 25-200 M10
Each
HK$74.40
Hager NGT MCB, 3P, 25A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4788
  • Mfr. Part No. NGT325
Each
HK$1,775.05
RS PRO MCB, 2P, 20A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0183
Each
HK$196.30
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