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

116 of 999+
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 116-990
  • Mfr. Part No. KV 9224
Each
HK$1,369.40
In Stock
Schneider Electric RCBO, 20A Current Rating, 1P Poles, Type B, Acti9 Range
  • RS Stock No. 245-089
  • Mfr. Part No. A9D56820
Each
HK$1,741.90
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4494
  • Mfr. Part No. 1SDA072704R1
Each
HK$56,174.03
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0296
  • Mfr. Part No. 8GK1062-2KK11
Each
HK$4,273.30
Temporarily out of stock
Eaton MCB, 1P, 2A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 248-578
  • Mfr. Part No. 101252 PLI-C2/1
Each
HK$676.20
In Stock
Eaton xEffect MCB, 1P, 12A Curve D
  • RS Stock No. 230-1008
  • Mfr. Part No. 177491 FAZ6-D12/1
Each
HK$216.37
Temporarily out of stock
Schneider Electric A9R RCCB, 63A, 4 Pole, 415V
  • RS Stock No. 245-153
  • Mfr. Part No. A9R61463
Each
HK$5,528.40
Temporarily out of stock
Schneider Electric RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-683
  • Mfr. Part No. A9DC4606
Each
HK$3,998.40
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 1P 70A, Breaking Capacity 35 kA, DIN Rail Mount
  • RS Stock No. 357-074
  • Mfr. Part No. BGL16070
Each
HK$5,333.02
In Stock
Littelfuse 250mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0118
  • Mfr. Part No. 0215.250TXP
Each (In a Pack of 10)
HK$10.77
Temporarily out of stock
Schneider Electric, ComPacT MCCB 1P 50A, Breaking Capacity 18 kA, Fixed Mount
  • RS Stock No. 345-308
  • Mfr. Part No. C10F1TM050
Each
HK$4,285.67
Temporarily out of stock
ABB RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6923
  • Mfr. Part No. 2CSR275180R1325
Each
HK$1,377.65
In Stock
Schneider Electric Surge Arrester, 40kA, 460V ac, Clip-On Mount
  • RS Stock No. 288-7110
  • Mfr. Part No. A9L40421
Each
HK$11,398.80
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 4P, 50A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-255
  • Mfr. Part No. 2CDS274001R0501
Each
HK$5,808.31
Temporarily out of stock
Eaton Fuse Puller Fuse Puller
  • RS Stock No. 261-727
  • Mfr. Part No. FP-6
Each
HK$1,175.50
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 63A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7477
  • Mfr. Part No. 5SL4463-6
Each
HK$2,279.10
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 150A, Breaking Capacity 14 kA, DIN Rail Mount
  • RS Stock No. 346-778
  • Mfr. Part No. NHDF36150TW
Each
HK$17,401.24
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 250A, Fixed Mount
  • RS Stock No. 250-4216
  • Mfr. Part No. 1SDA054511R1
Each
HK$40,422.30
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0085
  • Mfr. Part No. 1SDA054325R1 T5N400 FF PR221-LS 400A
Each
HK$15,482.51
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA
  • RS Stock No. 209-6901
  • Mfr. Part No. 3VA2063-5KP46-0AA0
Each
HK$13,954.90
1
116
2364
Results per page

Related links