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

51225 Products showing for Fuses & Circuit Breakers

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1 of 999+
In Stock
Eaton 63A British Standard Fuse A3 550V ac, 73.5 mm
  • RS Stock No. 413-383
  • Mfr. Part No. BAO63
Subtotal (1 unit)
HK$115.00
HK$115.00/unit
In Stock
RS Better World
ABB System Pro M Compact S200M Miniature Circuit Breaker, 4-Pole, 50A, Type C, 400V ac AC, 125 V dc DC, 15 kA Breaking
  • RS Stock No. 231-9777
  • Mfr. Part No. 2CDS274001R0504 S204M C 50A - 15 KA
Subtotal (1 box of 1 unit)
HK$1,422.60
HK$1,422.60/box
Temporarily out of stock
Panasonic Non-Resettable Fuse 5A, 32V dc
  • RS Stock No. 759-4795P
  • Mfr. Part No. ERBRE5R00V
Subtotal 10 units (supplied on a continuous strip)
HK$18.90
HK$1.89/unit
In Stock
Siemens 315A NH Fuse NH2 500V ac
  • RS Stock No. 395-563
  • Mfr. Part No. 3NA3252
Subtotal (1 pack of 3 units)
HK$403.50
HK$134.50/unit
In Stock
ABB System Pro M Compact S200M Miniature Circuit Breaker, 3-Pole, 50A, Type B, 440V ac AC, 12 V dc DC, 10 kA Breaking
  • RS Stock No. 535-6156
  • Mfr. Part No. 2CDS273001R0505 S203M-B50
Subtotal (1 unit)
HK$837.50
HK$837.50/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 3-Pole, 50A, Type B, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3240
  • Mfr. Part No. A9F53350
Subtotal (1 unit)
HK$1,268.80
HK$1,268.80/unit
In Stock
ABB SMISSLINE TP S403M-B50NP Miniature Circuit Breaker, 4-Pole, 50A, Type B, 400V ac AC, 50 kA Breaking Capacity
  • RS Stock No. 246-2689
  • Mfr. Part No. 2CCS573103R8505
Subtotal (1 unit)
HK$2,187.70
HK$2,187.70/unit
In Stock
ABB RCBO, 16A Current Rating, 2-Pole, 30 mA Trip Sensitivity, Type A, DS301C Range, 2CSR255163R Range
  • RS Stock No. 707-312
  • Mfr. Part No. 2CSR255163R1165
Subtotal (1 unit)
HK$1,161.75
HK$1,161.75/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 4-Pole, 32A, Type D, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 790-8737
  • Mfr. Part No. A9F55432
Subtotal (1 unit)
HK$2,149.16
HK$2,149.16/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 4-Pole, 50A, Type C, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3449
  • Mfr. Part No. A9F54450
Subtotal (1 unit)
HK$1,632.20
HK$1,632.20/unit
In Stock
Eaton 12A T Ceramic Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 852-7049
  • Mfr. Part No. MDA-12-R
Subtotal (1 unit)
HK$69.60
HK$69.60/unit
Limited stock
Eaton 13A F Ceramic Cartridge Fuse, 6.3 x 25 mm
  • RS Stock No. 412-605
  • Mfr. Part No. TDC180-13A
Subtotal (1 pack of 10 units)
HK$75.50
HK$7.55/unit
In Stock
Schneider Electric Acti9 iC60 Series Residual Current Device, 25A, 2-Pole, 30 mA, Type AC 240V ac
  • RS Stock No. 734-9071
  • Mfr. Part No. A9Q11225
Subtotal (1 unit)
HK$2,090.50
HK$2,090.50/unit
In Stock
Eaton 1A T Ceramic Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 537-1458
  • Mfr. Part No. S505-1-R
Subtotal (1 pack of 10 units)
HK$24.30
HK$2.43/unit
Stocked by manufacturer
Schneider Electric Acti9 Acti9 iC60 Miniature Circuit Breaker, 1-Pole, 2A, Type C, 240V ac AC, 72 V dc DC, 10 kA
  • RS Stock No. 776-3436
  • Mfr. Part No. A9F74102
Subtotal (1 unit)
HK$562.10
HK$562.10/unit
In Stock
Littelfuse 1A F Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 541-4375
  • Mfr. Part No. 0217001.MXP
Subtotal (1 pack of 10 units)
HK$34.20
HK$3.42/unit
Limited stock
RS PRO 6A British Standard Fuse F1 550V ac
  • RS Stock No. 521-2905
Subtotal (1 pack of 5 units)
HK$205.30
HK$41.06/unit
In Stock
Schneider Electric Cover for use with INS100, INS160
  • RS Stock No. 280-8418
  • Mfr. Part No. 28958
Subtotal (1 unit)
HK$129.70
HK$129.70/unit
Limited stock
Eaton 32A Rail Mount Fuse Holder, 1P-Pole, 550V ac
  • RS Stock No. 418-495
  • Mfr. Part No. 32NNSF
Subtotal (1 unit)
HK$122.10
HK$122.10/unit
In Stock
RS PRO 5A T Ceramic Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 563-693
Subtotal (1 pack of 10 units)
HK$48.60
HK$4.86/unit
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