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

50361 Products showing for Fuses & Circuit Breakers

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
Schneider Electric Multi9 Multi9 Miniature Circuit Breaker, 3-Pole, 10A, Type B, 14 kA Breaking Capacity
  • RS Stock No. 219-9113
  • Mfr. Part No. M9F21310
Subtotal (1 unit)
HK$2,346.90
HK$2,346.90/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$58.00
HK$58.00/unit
In Stock
RS PRO 63A British Standard Fuse A3 550V ac, 73.5 mm
  • RS Stock No. 521-2652
Subtotal (1 pack of 5 units)
HK$426.50
HK$85.30/unit
In Stock
Eaton Fuse Holder Accessory Red Spot Pad lockable Insert
  • RS Stock No. 262-566
  • Mfr. Part No. RS20LOCK
Subtotal (1 pack of 10 units)
HK$2,335.60
HK$2,335.60/pack
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
Eaton 100mA T Glass Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 852-7095
  • Mfr. Part No. MDL-1-10-R
Subtotal (1 unit)
HK$64.50
HK$64.50/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
Contactum Residual Current Circuit Breaker with Overload Protection, 6A Current Rating, 1-Pole, 30 mA Trip Sensitivity,
  • RS Stock No. 240-6392
  • Mfr. Part No. CCPBR1006AC
Subtotal (1 unit)
HK$287.20
HK$287.20/unit
In Stock
Eaton 63A Rail Mount Fuse Holder for A2, 1P-Pole, 690V ac
  • RS Stock No. 415-086
  • Mfr. Part No. RS63HWH
Subtotal (1 unit)
HK$330.40
HK$330.40/unit
In Stock
Littelfuse 1A Black Car Fuse, 32V dc
  • RS Stock No. 787-4110P
  • Mfr. Part No. 0287001.PXCN
Subtotal 10 units (supplied in a bag)
HK$26.00
HK$2.60/unit
In Stock
Legrand DX DX3 Miniature Circuit Breaker, 3-Pole, 16A, Type C, 400V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9727
  • Mfr. Part No. 4 078 29
Subtotal (1 unit)
HK$1,625.60
HK$1,625.60/unit
In Stock
SIBA 2.5A T Ceramic Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 783-3318
  • Mfr. Part No. 70-007-65/2.5A
Subtotal (1 pack of 10 units)
HK$55.70
HK$5.57/unit
In Stock
Eaton 160mA T Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 537-1622
  • Mfr. Part No. S506-160-R
Subtotal (1 pack of 10 units)
HK$46.60
HK$4.66/unit
In Stock
Bourns 0.5 A Resettable Fuse, 15V
  • RS Stock No. 647-8156
  • Mfr. Part No. MF-MSMF050-2
Subtotal (1 pack of 10 units)
HK$25.30
HK$2.53/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 4-Pole, 63A, Type D, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 790-8743
  • Mfr. Part No. A9F55463
Subtotal (1 unit)
HK$1,759.50
HK$1,759.50/unit
In Stock
Eaton 40A British Standard Fuse FE 690V ac, 63.5 mm
  • RS Stock No. 156-8939
  • Mfr. Part No. 40FE
Subtotal (1 unit)
HK$167.30
HK$167.30/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
In Stock
RS PRO FT Fuse Kit
  • RS Stock No. 893-8543
Subtotal (1 unit)
HK$1,393.70
HK$1,393.70/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
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