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

202 of 999+
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 50A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3240
  • Mfr. Part No. A9F53350
Each
HK$1,076.00
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8164
  • Mfr. Part No. C40W31M320
Each
HK$41,924.65
Temporarily out of stock
Schneider Electric Acti9 iC60H MCB, 3P, 1A Curve B, 415V AC, 133V DC, 70 kA Breaking Capacity
  • RS Stock No. 654-739
  • Mfr. Part No. A9F53301
Each
HK$2,053.30
In Stock
Littelfuse 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 32V dc
  • RS Stock No. 787-4312P
  • Mfr. Part No. 01550120HXU
Each (Supplied in a Bag)
HK$9.94
Temporarily out of stock
Eaton xEffect - FRCmM RCCB, 80A, 2 Pole, 30mA, Type A, 110V
  • RS Stock No. 127-429
  • Mfr. Part No. 180610 FRCMM-80/2/003-A-110
Each
HK$3,584.30
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 27 Way, 125 A
  • RS Stock No. 339-683
  • Mfr. Part No. SEA9APN27
Each
HK$5,258.40
In Stock
RS PRO MCB, 2P, 1A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0178
Each
HK$211.40
In Stock
Eaton RCCB, 25A, 2 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 227-0696
  • Mfr. Part No. 264268 PFGM-25/2/03
Each
HK$692.15
In Stock
Bourns Surface Mount Fuse 8A, 48V dc
  • RS Stock No. 245-9234
  • Mfr. Part No. SF-1206F800M-2
Each (On a Tape of 10)
HK$4.19
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 782-8029
  • Mfr. Part No. W58-XB1A4A-3
Each
HK$89.10
In Stock
Dehn Stainless Steel Lightning Earth Clamp Nominal Rod dia. 8-10mm
  • RS Stock No. 786-9358
  • Mfr. Part No. M8 UNI PV
Each
HK$151.40
Temporarily out of stock
Eaton 400A Bolted Tag Fuse, B4, 460 V dc, 660V ac, 111mm
  • RS Stock No. 182-1458
  • Mfr. Part No. TMF400M450
Each
HK$7,014.70
Temporarily out of stock
315A Tag Fuse, 71 x 150mm, 500V
  • RS Stock No. 263-441
  • Mfr. Part No. 315NHG3B NH FUSE 315A 500V gG SIZE 3 DUAL IND
1 Pack of 3
HK$701.30
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7895
  • Mfr. Part No. C25F4D
Each
HK$10,535.09
Temporarily out of stock
ABB RCBO, 40A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5197
  • Mfr. Part No. 2CSR274001R1405
Each
HK$3,376.69
In Stock
Mersen 50A NH Fuse, NH00, 690V ac
  • RS Stock No. 448-3370
  • Mfr. Part No. Q320151
Each
HK$715.99
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 232-0093
  • Mfr. Part No. 1SDA054412R1 T5H630 FF PR221-LS 630A
Each
HK$20,659.17
Temporarily out of stock
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 4P 300A, Breaking Capacity 18.5 kA, Fixed Mount
  • RS Stock No. 231-731
  • Mfr. Part No. 107583 NZMB2-4-A300/200
Each
HK$18,099.16
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3777
  • Mfr. Part No. 3VA2110-6HN32-0AA0
Each
HK$8,175.60
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3778
  • Mfr. Part No. 3VA2116-6KP42-0AA0
Each
HK$23,372.50
1
202
2364
Results per page

Related links