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

51504 Products showing for Fuses & Circuit Breakers

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In Stock
RS PRO 1.5A T Glass Cartridge Fuse, 5 x 20 mm
  • RS Stock No. 911-3394
Subtotal (1 pack of 10 units)
HK$36.50
HK$3.65/unit
Being discontinued
RS PRO 500mA F Glass Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 668-6029
Subtotal (1 pack of 10 units)
HK$30.00
HK$3.00/unit
In Stock
Eaton 1A F Ceramic Cartridge Fuse, 6.3 x 25 mm
  • RS Stock No. 412-986
  • Mfr. Part No. TDC180-1A
Subtotal (1 pack of 10 units)
HK$125.80
HK$12.58/unit
In Stock
Siemens 100A Centred Tag Fuse NH000 500V ac
  • RS Stock No. 203-2011
  • Mfr. Part No. 3NA7830
Subtotal (1 pack of 3 units)
HK$136.299
HK$45.433/unit
In Stock
Schurter 10A Panel Mount Fuse Holder, 1P-Pole for 5 x 20 mm, 240V
  • RS Stock No. 789-7854
  • Mfr. Part No. 4301.1407
Subtotal (1 unit)
HK$27.90
HK$27.90/unit
In Stock
RS Better World
ABB System Pro M Compact S200 Miniature Circuit Breaker, 2-Pole, 40A, Type K, 400V ac AC, 125 V dc DC, 10 kA Breaking
  • RS Stock No. 746-8015
  • Mfr. Part No. 2CDS252001R0557 S202-K40
Subtotal (1 unit)
HK$874.50
HK$874.50/unit
In Stock
ETA 1110 Thermal Circuit Breaker -, 16A Current Rating 1-Pole, Panel Mount
  • RS Stock No. 417-026
  • Mfr. Part No. 1110-F112-P1M1-16A
Subtotal (1 unit)
HK$309.20
HK$309.20/unit
In Stock
ETA 3120-N 3120-N Thermal Circuit Breaker -, 20A Current Rating 5-Pole, Screw
  • RS Stock No. 210-2098
  • Mfr. Part No. 3120-N551-H7T1-W14DR4-20A
Subtotal (1 unit)
HK$311.70
HK$311.70/unit
In Stock
Littelfuse 25A White Car Fuse, 32V dc
  • RS Stock No. 787-4154
  • Mfr. Part No. 0287025.PXCN
Subtotal (1 pack of 10 units)
HK$26.00
HK$2.60/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$10,525.30
HK$10,525.30/pack
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
Temporarily out of stock
RS Better World
Siemens SENTRON 5SY4 Miniature Circuit Breaker, 2-Pole, 13A, Type C, 400V ac AC, 72 V dc DC, 5 kA Breaking Capacity
  • RS Stock No. 209-7513
  • Mfr. Part No. 5SY4213-7
Subtotal (1 unit)
HK$938.70
HK$938.70/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
In Stock
ABB PS1 PS1 3 Phase Busbar, 690 V ac, 250 V dc, 17.5 mm Pitch
  • RS Stock No. 711-6492
  • Mfr. Part No. 1SAM201906R1102 PS1-2-0-65
Subtotal (1 unit)
HK$125.50
HK$125.50/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 3-Pole, 32A, Type C, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3398
  • Mfr. Part No. A9F54332
Subtotal (1 unit)
HK$3,038.30
HK$3,038.30/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$952.70
HK$952.70/unit
In Stock
Schurter 20A T Ceramic Cartridge Fuse, 6.3 x 32 mm
  • RS Stock No. 703-2663
  • Mfr. Part No. 8020.0605.G
Subtotal (1 pack of 10 units)
HK$102.30
HK$10.23/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$2,268.60
HK$2,268.60/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$1,610.90
HK$1,610.90/box
In Stock
TE Connectivity W54 Thermal Circuit Breaker -, 5A Current Rating 1-Pole, Direct
  • RS Stock No. 782-8035
  • Mfr. Part No. W54-XB1A4A10-5
Subtotal (1 unit)
HK$27.50
HK$27.50/unit
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