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

47189 Products showing for Fuses & Circuit Breakers

1 of 999+
In Stock
SIBA 500 mA T Ceramic Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 783-3286
  • Mfr. Part No. 70-007-65/0.5A
Subtotal (1 pack of 10 units)
HK$77.70
In Stock
Schneider Electric Multi9 Multi 9 Miniature Circuit Breaker, 3-Pole, 10 A, Type B, 440 V ac AC, 14 kA Breaking Capacity
  • RS Stock No. 219-9113
  • Mfr. Part No. M9F21310
Subtotal (1 unit)
HK$2,040.80
In Stock
Legrand 3 A F Ceramic Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 266-3069
  • Mfr. Part No. 0 102 63
Subtotal (1 box of 10 units)
HK$158.50
In Stock
Eaton 20A British Standard Fuse, A1, 550V ac, 42.5mm
  • RS Stock No. 139-883
  • Mfr. Part No. NITD20M25
Subtotal (1 pack of 5 units)
HK$142.70
In Stock
Eaton 63A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1552
  • Mfr. Part No. XS63
Subtotal (1 box of 10 units)
HK$4,774.40
In Stock
Littelfuse 10 A T Ceramic Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 738-2826
  • Mfr. Part No. 0326010.MXP
Subtotal (1 pack of 10 units)
HK$121.50
In Stock
Littelfuse 10 A F Ceramic Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 769-0079
  • Mfr. Part No. 0314010.HXP
Subtotal (1 pack of 10 units)
HK$78.20
In Stock
Littelfuse 4 A T Glass Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 769-0124
  • Mfr. Part No. 0313004.HXP
Subtotal (1 pack of 5 units)
HK$40.30
In Stock
Littelfuse 2.5 A T Ceramic Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 541-3726
  • Mfr. Part No. 021502.5MXP
Subtotal (1 pack of 10 units)
HK$101.00
Temporarily out of 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$2,101.80
In Stock
Legrand DX DX3 Miniature Circuit Breaker, 3-Pole, 16 A, Type C, 400 V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9727
  • Mfr. Part No. 4 078 29
Subtotal (1 unit)
HK$1,578.30
In Stock
Eaton 315 mA T Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 537-8651
  • Mfr. Part No. S506-315-R
Subtotal (1 pack of 10 units)
HK$21.50
In Stock
Europa EUR1 RCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 210-4747
  • Mfr. Part No. EUR125.30/2A
Subtotal (1 unit)
HK$349.70
In Stock
Eaton 20 A T Glass Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 852-7137
  • Mfr. Part No. MDL-20-R
Subtotal (1 unit)
HK$21.30
In Stock
Eaton xPole PXL Miniature Circuit Breaker, 3-Pole, 32 A, Type C, 400 V ac AC, 48 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 490-315
  • Mfr. Part No. 236429 PXL-C32/3
Subtotal (1 unit)
HK$394.20
In Stock
Eaton 10 A Ceramic Cartridge Fuse, 10 x 38 mm
  • RS Stock No. 703-8386
  • Mfr. Part No. C10G10
Subtotal (1 pack of 10 units)
HK$107.30
In Stock
Bourns 0.5 A Resettable Fuse, 15 V
  • RS Stock No. 647-8156
  • Mfr. Part No. MF-MSMF050-2
Subtotal (1 pack of 10 units)
HK$24.90
In Stock
Siemens SENTRON 5SY4 Miniature Circuit Breaker, 1-Pole, 1.6 A, Type C, 400 V ac AC, 60 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 622-0064
  • Mfr. Part No. 5SY4115-7
Subtotal (1 unit)
HK$384.60
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Without Protection, Canalis KBC Series
  • RS Stock No. 219-8879
  • Mfr. Part No. KBC16DCB40
Subtotal (1 unit)
HK$804.05
In Stock
Better World
Schneider Electric Residual Current Circuit Breaker with Overload Protection, 20 A Current Rating, 1-Pole, 30 mA Trip
  • RS Stock No. 790-9305
  • Mfr. Part No. A9D11820
Subtotal (1 unit)
HK$1,562.30
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