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

78 of 999+
In Stock
NEMIQ Earthing Strap Copper
  • RS Stock No. 283-7538
  • Mfr. Part No. JF 10-150 M6
Each
HK$51.30
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 50A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-038
  • Mfr. Part No. 2CDS271061R0577
Each
HK$1,451.20
In Stock
Better World
Schneider Electric Acti 9 Mounting Kit for use with Acti 9, Acti 9 Smartlink
  • RS Stock No. 125-1387
  • Mfr. Part No. A9XMFA04
Each
HK$194.30
In Stock
Better World
Schneider Electric 2A Cartridge Fuse, 8.5 x 32mm
  • RS Stock No. 219-9037
  • Mfr. Part No. DF2BN0200
Each (In a Pack of 10)
HK$65.25
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 65V dc Voltage Rating DIN Rail, 4A Current Rating
  • RS Stock No. 135-837
  • Mfr. Part No. 0914303
1 Pack of 6
HK$3,938.10
Temporarily out of stock
Better World
Schneider Electric Busbar Trunking End Cover, Canalis KBA Series
  • RS Stock No. 211-0359
  • Mfr. Part No. KBA40AF
Each (In a Pack of 5)
HK$153.26
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 8A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-198
  • Mfr. Part No. 2CDS273061R0407
Each
HK$4,271.38
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 250V ac Voltage Rating DIN Rail, 500mA Current
  • RS Stock No. 135-482
  • Mfr. Part No. 0914581
1 Pack of 6
HK$3,931.50
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 3P, 500mA Curve C, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-724
  • Mfr. Part No. 2CDS253001R0984
Each
HK$2,081.74
In Stock
RS PRO F, T Fuse Kit
  • RS Stock No. 611-9138
Each
HK$1,143.60
Temporarily out of stock
ABB S801S MCB, 1P, 50A, UC-K, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-627
  • Mfr. Part No. 2CCS861001R1577
Each
HK$3,371.38
Temporarily out of stock
Neozed Sicherungssockel D01, 3P, 16A, 40
  • RS Stock No. 537-819
  • Mfr. Part No. R9J01316
Each
HK$328.80
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 125A, Breaking Capacity 15 kA, Fixed Mount
  • RS Stock No. 341-214
  • Mfr. Part No. C25H6TM125
Each
HK$27,592.76
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 63A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6464
  • Mfr. Part No. 5SL4163-8
Each
HK$691.20
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 50A Curve K, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-204
  • Mfr. Part No. 2CDS273001R0577
Each
HK$4,183.28
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 201-488
  • Mfr. Part No. 1STQ007408A0000
Each
HK$8,952.38
Temporarily out of stock
Littelfuse 0.17A Resettable Fuse, 60V
  • RS Stock No. 517-6578P
  • Mfr. Part No. RXEF017
Each (Supplied in a Bag)
HK$2.07
Temporarily out of stock
Hager Hager MMN Circuit Breaker, 2P, 6.3A, Type AC, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-787
  • Mfr. Part No. MMN206
Each
HK$2,863.20
In Stock
Eaton 100A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P, 690V ac
  • RS Stock No. 703-8572
  • Mfr. Part No. CH223B
Each
HK$955.00
Temporarily out of stock
Schneider Electric Busbar Tap-Off Unit, 680mm, 630A, Canalis Series
  • RS Stock No. 354-466
  • Mfr. Part No. KH063SD9502
Each
HK$87,313.00
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