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

94 of 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4640
  • Mfr. Part No. 1SDA072913R1
Each
HK$76,461.60
In Stock
RS PRO MCB, 2P, 10A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0159
Each
HK$188.70
Temporarily out of stock
Eaton 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9408
  • Mfr. Part No. S500-400-R
1 Bag of 1000
HK$3,286.00
Temporarily out of stock
Eaton 10A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 255-490
  • Mfr. Part No. 24TDMEJ10
Each
HK$1,555.40
In Stock
Schurter 10A Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 269-3815
  • Mfr. Part No. 3101.0310
Each
HK$14.10
In Stock
Schneider Electric Resi9 R9PF MCB, 3P, 16A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8967
  • Mfr. Part No. R9PFC716
Each
HK$873.59
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 5 kA, Withdrawable
  • RS Stock No. 231-345
  • Mfr. Part No. 113525 NZMN3-S400-AVE
Each
HK$23,586.58
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 1+N, 3A Curve C, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-835
  • Mfr. Part No. 2CDS271103R0034
Each
HK$1,323.98
Temporarily out of stock
400A Tag Fuse, 190 x 225mm, 690V
  • RS Stock No. 262-033
  • Mfr. Part No. EBH213TTM1
Each
HK$3,553.80
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-111
  • Mfr. Part No. 3VA2140-5JP36-0AA0
Each
HK$11,646.10
Temporarily out of stock
Siemens SENTRON Busbar Connector for use with 3VA9603
  • RS Stock No. 269-7228
  • Mfr. Part No. 3VA9603-0QC01
Each (In a Pack of 3)
HK$713.967
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 160A, Fixed Mount
  • RS Stock No. 254-6345
  • Mfr. Part No. C16F3TM160
Each
HK$9,205.00
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 4kA , 3 channels , Fixed
  • RS Stock No. 132-658
  • Mfr. Part No. 183633 IZMX40N3-P40F-1
Each
HK$292,170.96
Temporarily out of stock
Siemens SENTRON Long Rear Connection for use with 3VA1 250
  • RS Stock No. 269-7124
  • Mfr. Part No. 3VA9214-0QF00
Each (In a Pack of 4)
HK$181.75
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 3P, 6A Curve B, 400V AC, 72V DC
  • RS Stock No. 213-1043
  • Mfr. Part No. 5SL6306-6
Each
HK$666.70
In Stock
ABB System Pro M Compact S200M MCB, 1P, 40A Curve D, 230V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 746-8150
  • Mfr. Part No. 2CDS271001R0401 S201M-D40
Each
HK$137.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-272
  • Mfr. Part No. 3VA6460-5KP41-0AA0
Each
HK$46,624.40
In Stock
Phoenix Contact Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 10A Current Rating
  • RS Stock No. 217-6363
  • Mfr. Part No. 2800865
Each
HK$360.50
In Stock
Schneider Electric Acti9 3 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 212-255
  • Mfr. Part No. A9XPH416
Each
HK$343.48
Temporarily out of stock
Siemens SENTRON 5SJ4360 MCB, 3P, 60A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-707
  • Mfr. Part No. 5SJ4360-7HG41
Each
HK$4,649.50
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