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

46609 Products showing for Fuses & Circuit Breakers

2224 of 999+
Temporarily out of stock
ABB S801N MCB, 1P, 6A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-872
  • Mfr. Part No. 2CCS891001R0064
Each
HK$1,628.08
In Stock
ABB High Performance S800N MCB, 2P, 63A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-566
  • Mfr. Part No. 2CCS892001R0634 S802N-C63
Each
HK$1,492.50
In Stock
Europa EUC1P EUC MCB, 1P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6513
  • Mfr. Part No. EUC1P32C
Each
HK$68.60
In Stock
Eaton xEffect MCB, 3+N, 15A Curve C
  • RS Stock No. 230-0960
  • Mfr. Part No. 177468 FAZ6-C15/3N
Each
HK$480.32
Temporarily out of stock
RS PRO 80A Slotted Tag Fuse, 17.4 x 42mm, 240V, 42mm
  • RS Stock No. 188-4504
Each (In a Box of 200)
HK$158.545
In Stock
Mersen 2A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-842
  • Mfr. Part No. Z085375Q
1 Box of 10
HK$134.77
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 260-245
  • Mfr. Part No. 3VA6325-0HL31-0AA0
Each
HK$28,125.30
Temporarily out of stock
Better World
Siemens 5SV3344 RCCB, 40A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 231-8380
  • Mfr. Part No. 5SV3344-6GV02
Each (In a Pack of 18)
HK$824.561
Temporarily out of stock
Siemens Sentron Adapter for use with Busbar System
  • RS Stock No. 228-8261
  • Mfr. Part No. 8US1998-2BJ10
Each (In a Pack of 10)
HK$91.72
Temporarily out of stock
Eaton Three Phase Surge Protector, 40kA, 1.4kV, DIN Rail Mount
  • RS Stock No. 120-749
  • Mfr. Part No. 167596 SPCT2-280/4
Each
HK$2,882.98
Temporarily out of stock
Eaton RCCB, 63A, 2 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 227-0741
  • Mfr. Part No. 264288 PFGM-63/2/03
Each
HK$757.36
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3769
  • Mfr. Part No. 3VA2040-7HM46-0AA0
Each
HK$26,000.90
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-3175
  • Mfr. Part No. 1SDA071039R1
Each
HK$110,444.88
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-9515
  • Mfr. Part No. C10N4TM100
Each
HK$8,311.36
Temporarily out of stock
Eaton xEffect FAZ MCB, 1P, 30A Curve C, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 231-423
  • Mfr. Part No. 113765 FAZ-C30/1-NA-DC
Each
HK$1,134.69
Temporarily out of stock
Siemens 32A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6984
  • Mfr. Part No. 3NE8801-0MK
Each (In a Pack of 3)
HK$584.467
Temporarily out of stock
Eaton RCCB, 80A, 1+N Pole, 100mA, Type AC
  • RS Stock No. 667-0620
  • Mfr. Part No. 235403 PFIM-80/2/01-MW
Each
HK$1,640.90
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3492
  • Mfr. Part No. 1SDA071459R1
Each
HK$91,492.76
Temporarily out of stock
ABB Tmax XT Trip Unit for use with XT4
  • RS Stock No. 236-7272
  • Mfr. Part No. 1SDA067378R1 TMD 20-300 XT4 3p
Each
HK$4,124.96
Temporarily out of stock
Eaton xEffect xEffect - FAZ-T MCB, 3P, 32A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 129-393
  • Mfr. Part No. 142495 FAZT-C32/3
Each
HK$2,055.20
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