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

2292 of 999+
Temporarily out of stock
Better World
Schneider Electric Linergy Busbar Adapter, 690V, 60mm Pitch
  • RS Stock No. 211-0822
  • Mfr. Part No. LA9ZA32442
Each (In a Pack of 4)
HK$811.483
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 3P, 20A Curve C
  • RS Stock No. 218-3906
  • Mfr. Part No. A9P24720
Each
HK$1,322.20
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-578
  • Mfr. Part No. 3VA6560-6JQ42-2AA0
Each
HK$68,974.00
Temporarily out of stock
Better World
Schneider Electric Multi 9 C60BP MCB, 3P, 5A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2453
  • Mfr. Part No. M9F43305
Each
HK$2,303.60
Temporarily out of stock
SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 263-763
  • Mfr. Part No. 3VA9144-0JB11
1 Kit
HK$295.60
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 6A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-6649
  • Mfr. Part No. 5SL4606-7
Each
HK$1,318.20
Temporarily out of stock
Better World
Siemens SENTRON 5SY8 MCB, 1P, 3A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8922
  • Mfr. Part No. 5SY8103-7
Each
HK$478.80
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - AP12 2 Pole Panel Mount, 1A Current Rating
  • RS Stock No. 275-0165
  • Mfr. Part No. AP12-1-42-102
1 Box of 5
HK$13,635.20
In Stock
Siemens 20A DII Diazed Fuse, E27 Thread Size, gR, 500V
  • RS Stock No. 203-3953
  • Mfr. Part No. 5SD430
Each (In a Pack of 5)
HK$107.10
In Stock
Schurter 32A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 144-1830
  • Mfr. Part No. 8020.5026.G
Each (In a Bag of 10)
HK$11.14
Temporarily out of stock
Eaton Metering Board ZSD Mounting Kit for use with Metering Board ZSD
  • RS Stock No. 252-801
  • Mfr. Part No. 217335 ZSD-BPKT/T/08
Each
HK$511.54
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3341
  • Mfr. Part No. 1SDA071247R1
Each
HK$230,692.37
Temporarily out of stock
Eaton RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, Type C, FRBmM Range
  • RS Stock No. 123-656
  • Mfr. Part No. 170791 FRBM6-C32/2/003-A
Each
HK$1,455.76
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3+N, 8A Curve C, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-963
  • Mfr. Part No. 2CDS273103R0084
Each
HK$3,575.19
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 125A, Breaking Capacity 15 kA, Fixed Mount
  • RS Stock No. 347-118
  • Mfr. Part No. C25F6TM125
Each
HK$21,163.93
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 3P, 63A Curve D, 400V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 610-350
  • Mfr. Part No. 5SY8363-8
Each
HK$4,583.61
In Stock
SIBA 3.15A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3248
  • Mfr. Part No. 70-007-33/3.15A
Each (In a Pack of 10)
HK$6.11
In Stock
Littelfuse 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4476
  • Mfr. Part No. 0216.630MXP
Each (In a Pack of 10)
HK$10.23
In Stock
Siemens 63A DIII Diazed Fuse, E33 Thread Size, gR, 500V
  • RS Stock No. 202-7226
  • Mfr. Part No. 5SD470
Each (In a Pack of 5)
HK$158.80
In Stock
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 284-6101
  • Mfr. Part No. 4410.0106
Each
HK$189.40
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