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

200 of 999+
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 20A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2397
  • Mfr. Part No. M9F23220
Each
HK$384.90
Temporarily out of stock
Hager RCCB, 40A, 2 Pole, 30mA
  • RS Stock No. 144-4887
  • Mfr. Part No. CDC140F
Each
HK$1,965.44
In Stock
Phoenix Contact TRABTECH Thermal Circuit Breaker - CB TM2 16A M1 P 2 Pole, 16A Current Rating
  • RS Stock No. 768-1025
  • Mfr. Part No. 2800889
Each
HK$722.80
In Stock
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 20A Current Rating
  • RS Stock No. 210-2104
  • Mfr. Part No. 3120-N551-H7T1-W19DG4-20A
Each
HK$253.70
In Stock
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 782-7947
  • Mfr. Part No. W23-X1A1G-10
Each
HK$296.30
In Stock
ABB Surge Protector, DIN Rail Mount
  • RS Stock No. 136-3878
  • Mfr. Part No. 1SNA198729R0100
Each (In a Pack of 5)
HK$10.06
Temporarily out of stock
Schneider Electric Acti9 Acti9 iC60 MCB, 4P, 1A Curve K, 500V AC, 70 KA Breaking Capacity
  • RS Stock No. 205-184
  • Mfr. Part No. A9F95401
Each
HK$8,715.84
Temporarily out of stock
Eaton 160A Tag Fuse, 415V ac, 94mm
  • RS Stock No. 229-029
  • Mfr. Part No. DEO160
1 Pack of 5
HK$3,662.30
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 4P, 80A Curve C, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-592
  • Mfr. Part No. 5SY4680-7
Each
HK$4,753.38
Temporarily out of stock
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA, Fixed Mount
  • RS Stock No. 243-481
  • Mfr. Part No. 100777 NZMH2-VE100-S1
Each
HK$14,304.48
Temporarily out of stock
Phoenix Contact 10A Fuse Holder for 45.4mm Fuse, 400V
  • RS Stock No. 131-142
  • Mfr. Part No. 920326
1 Pack of 1
HK$62.80
Temporarily out of stock
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-746
  • Mfr. Part No. A9DH3632
Each
HK$2,998.80
Temporarily out of stock
Siemens 30A Fuse Holder for Class Jmm Fuse, 1P, 600V
  • RS Stock No. 627-082
  • Mfr. Part No. 3NW7511-3HG
1 Pack of 6
HK$1,629.80
In Stock
Socomec 4A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5263
  • Mfr. Part No. 60120004
Each (In a Pack of 10)
HK$10.23
In Stock
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 182-1446
  • Mfr. Part No. CHCC3DU
Each (In a Box of 4)
HK$897.825
In Stock
Schurter 10A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 500V ac
  • RS Stock No. 173-9891
  • Mfr. Part No. 0031.8231
Each (In a Box of 100)
HK$10.528
In Stock
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 867-4356
  • Mfr. Part No. 3101.0031
Each (In a Pack of 10)
HK$23.97
In Stock
Eaton 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 233-0583
  • Mfr. Part No. BK1-HTJ-606I
Each (In a Pack of 10)
HK$33.75
In Stock
Eaton 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 1.5kV
  • RS Stock No. 181-8702
  • Mfr. Part No. CHPV2U
Each
HK$868.60
Temporarily out of stock
16A Fuse Holder for 36 x 71 x 81mm Fuse, 3P, 400V
  • RS Stock No. 262-604
  • Mfr. Part No. TFRN01C
1 Pack of 5
HK$1,220.40
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