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

191 of 999+
Temporarily out of stock
Siemens SENTRON Cover Frame for use with 3VA15/25/26
  • RS Stock No. 161-973
  • Mfr. Part No. 3VA9504-0SB20
Each
HK$601.30
In Stock
Schurter SMD Non Resettable Fuse 250mA, 125V ac/dc
  • RS Stock No. 733-4852P
  • Mfr. Part No. 3404.0110.22
Each (Supplied on a Reel)
HK$8.42
Temporarily out of stock
Hager Hager NKN Circuit Breaker, 2P, 63A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-798
  • Mfr. Part No. NKN263
Each
HK$2,281.80
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 125V ac/dc
  • RS Stock No. 878-1741
  • Mfr. Part No. 0273001.H
Each
HK$53.10
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 500mA, 125V ac/dc
  • RS Stock No. 541-3259
  • Mfr. Part No. 0251.500NRT1L
Each (In a Pack of 10)
HK$6.60
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 654-143
  • Mfr. Part No. C12F6TM160L
Each
HK$11,159.56
Temporarily out of stock
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 339-337
  • Mfr. Part No. SEE116C03
Each
HK$1,462.66
In Stock
RS PRO SMD Non-Resettable Surface Mount Fuse 5A, 63V
  • RS Stock No. 252-2125
Each (In a Pack of 50)
HK$1.394
In Stock
Littelfuse 20A Panel Mount Fuse Holder for 6.35 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 878-1962
  • Mfr. Part No. 03453LS8H
Each
HK$41.40
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 15A Curve C, 277V AC
  • RS Stock No. 256-6800
  • Mfr. Part No. M9F52215
Each
HK$1,783.20
In Stock
Littelfuse SMD Non Resettable Fuse 1A, 125V
  • RS Stock No. 787-4331
  • Mfr. Part No. 0449001.MR
Each (In a Pack of 5)
HK$15.00
In Stock
Eaton 400A Rail Mount Fuse Holder for NH2 Fuse, 1P, 690V ac
  • RS Stock No. 765-2954
  • Mfr. Part No. SD2-D
Each
HK$1,016.40
In Stock
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6939
  • Mfr. Part No. HTB-38M-R
Each
HK$99.00
In Stock
Schurter SMD Non Resettable Fuse 5A, 125V ac/dc
  • RS Stock No. 131-741
  • Mfr. Part No. 3404.0017.11
Each (In a Pack of 10)
HK$6.94
In Stock
Littelfuse SMD Non Resettable Fuse 7A, 72V
  • RS Stock No. 738-2980
  • Mfr. Part No. 0452007.MRL
Each (In a Pack of 10)
HK$17.64
In Stock
Europa Busbar
  • RS Stock No. 849-6260
  • Mfr. Part No. ECWBB4
Each
HK$26.70
In Stock
ABB RCBO, 20A Current Rating, 3P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 767-4419
  • Mfr. Part No. 2CSR273001R1205 DS203 M AC-B20/0,03
Each
HK$2,634.85
Temporarily out of stock
Siemens, SENTRON MCCB 3P 1.25kA, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4873
  • Mfr. Part No. 3VA2612-5HL32-0AA0
Each
HK$97,293.20
Temporarily out of stock
ABB F200 RCCB, 100A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 225-6102
  • Mfr. Part No. 2CSF202101R1900 F202 A-100/0.03
Each
HK$2,439.66
In Stock
Phoenix Contact Electronic Circuit Breaker
  • RS Stock No. 252-5377
  • Mfr. Part No. 1115657
Each
HK$974.60
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