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

71 of 999+
In Stock
Eaton 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7086
  • Mfr. Part No. BK-MDA-4-R
Each
HK$13.30
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 3A Curve K, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7974
  • Mfr. Part No. 2CDS252001R0317 S202-K3
Each
HK$713.11
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 63A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6534
  • Mfr. Part No. 5SL4563-8
Each
HK$1,394.40
Temporarily out of stock
Better World
Siemens SENTRON Fire Safety Circuit Breaker, 1+N, 10A Curve C, 230V AC
  • RS Stock No. 238-3210
  • Mfr. Part No. 5SV6016-7MC10
Each
HK$2,354.60
Temporarily out of stock
Eaton 20A Yellow Automotive Car Fuse, 32V dc No
  • RS Stock No. 848-2567
  • Mfr. Part No. ATC-20
Each
HK$9.20
In Stock
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 1P, 600V
  • RS Stock No. 299-082
  • Mfr. Part No. 1SNF100031R0000
Each
HK$50.80
In Stock
Europa EUC1P EUB MCB, 1P, 4A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6456
  • Mfr. Part No. EUC1P4B
Each
HK$72.90
In Stock
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 1P, 600V
  • RS Stock No. 299-080
  • Mfr. Part No. 1SNF100030R0000
Each
HK$57.30
In Stock
Littelfuse SMD Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 541-3350P
  • Mfr. Part No. 0451.500MRL
Each (Supplied on a Reel)
HK$7.85
In Stock
ETI 16A Bottle Fuse Holder, 1P, 400V ac
  • RS Stock No. 289-8815
  • Mfr. Part No. 2231003
Each
HK$61.60
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P+N, 690V ac
  • RS Stock No. 182-0347
  • Mfr. Part No. H215655
Each
HK$152.10
In Stock
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 867-4359
  • Mfr. Part No. 3101.0110
Each
HK$53.60
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2788
  • Mfr. Part No. 2908192
Each
HK$1,223.10
In Stock
Siemens 4A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 396-168
  • Mfr. Part No. 5SB221
Each (In a Pack of 5)
HK$13.10
In Stock
Littelfuse 0.35A Resettable Fuse, 16V dc
  • RS Stock No. 787-4195P
  • Mfr. Part No. 1206L035/16YR
Each (Supplied on a Reel)
HK$2.03
In Stock
Eaton 32A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 181-8584
  • Mfr. Part No. C14M32
Each (In a Box of 10)
HK$17.43
In Stock
Siemens SENTRON Nut Keeper Kit for use with 3VA5
  • RS Stock No. 269-7149
  • Mfr. Part No. 3VA9233-0QA00
Each (In a Pack of 3)
HK$202.467
In Stock
ETA Thermal Circuit Breaker - 1610 Single Pole 32V dc Voltage Rating, 30A Current Rating
  • RS Stock No. 150-085
  • Mfr. Part No. 1610-21-30A
Each
HK$80.00
In Stock
Better World
Siemens, SENTRON MCCB 3P 32A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4250
  • Mfr. Part No. 3VA1132-3ED36-0AA0
Each
HK$2,081.20
In Stock
Better World
Schneider Electric Auto Recloser for use with 2
  • RS Stock No. 220-1209
  • Mfr. Part No. A9C70342
Each
HK$6,471.57
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