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

231 of 999+
In Stock
Eaton xEffect MCB, 1P, 10A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6961
  • Mfr. Part No. 278531 FAZ-B10/1
Each
HK$182.90
In Stock
WAGO Electronic Circuit Breaker 10A 48V 787, 4 channels , DIN Rail
  • RS Stock No. 279-4103
  • Mfr. Part No. 787-1664/000-200
Each
HK$2,688.70
Temporarily out of stock
Siemens SENTRON Plug In Kit for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9374
  • Mfr. Part No. 3VA9324-0KP00
Each
HK$10,493.90
Temporarily out of stock
ABB Busbar for use with Miniature Circuit Breakers
  • RS Stock No. 250-4775
  • Mfr. Part No. 2CDL701302R0320
1 Box of 10
HK$453.10
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 20A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1325
  • Mfr. Part No. 5SY4220-7
Each
HK$873.50
Temporarily out of stock
Schneider Electric Resi9 R9F2 MCB, 1P, 25A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-140
  • Mfr. Part No. R9F23125
Each
HK$158.42
Temporarily out of stock
Siemens 2A Cartridge Fuse, 8 X 32mm
  • RS Stock No. 665-115
  • Mfr. Part No. 3NW6302-1
1 Pack of 10
HK$413.60
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 10A Curve B, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3354
  • Mfr. Part No. A9F76110
Each
HK$529.78
Temporarily out of stock
Schneider Electric Acti9 3, 3+N Phase Extension Box, 200 A
  • RS Stock No. 339-374
  • Mfr. Part No. SEA9PNI2003
Each
HK$8,744.70
In Stock
Littelfuse Non-Resettable Wire Ended Fuse 375mA, 125V ac/dc
  • RS Stock No. 738-3065P
  • Mfr. Part No. 0251.375MRT1L
Each (Supplied on a Reel)
HK$9.26
In Stock
Schneider Electric C120 A9N Circuit Breaker, 2P, 80A, Type AC, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 288-7113
  • Mfr. Part No. A9N18345
Each
HK$5,063.16
Temporarily out of stock
ABB S800S MCB, 2P, 32A Curve B, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 141-232
  • Mfr. Part No. 2CCS862001R0325
Each
HK$3,980.04
Temporarily out of stock
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 1A Current Rating
  • RS Stock No. 201-5503
  • Mfr. Part No. 2800847
Each
HK$372.40
Limited stock
Schneider Electric Multifix Cover for use with Circuit Breaker
  • RS Stock No. 275-8762
  • Mfr. Part No. ENN12819
Each
HK$153.70
Temporarily out of stock
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-734
  • Mfr. Part No. Mi 1221
Each
HK$3,008.50
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0421
  • Mfr. Part No. M39019/02-249
Each
HK$8,122.90
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 2 Pole Panel Mount, 20A Current Rating
  • RS Stock No. 275-0429
  • Mfr. Part No. M39019/03-333S
1 Box of 3
HK$44,851.40
Last RS stock
Schurter 16A PCB Mount Fuse Holder for 6.3 x 32mm Fuse, 500V ac
  • RS Stock No. 719-1544
  • Mfr. Part No. 0031.2520
Each
HK$138.50
Temporarily out of stock
HENSEL 1, 3 Phase Distribution Board, 54 Way, 63 A
  • RS Stock No. 183-2863
  • Mfr. Part No. KV9354M
Each
HK$2,448.70
In Stock
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 182-1447
  • Mfr. Part No. CHCC3DIU
Each (In a Box of 4)
HK$1,227.275
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