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

2327 of 999+
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 1P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 191-6103
  • Mfr. Part No. A9P24601
Each
HK$938.91
In Stock
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 16A Current Rating
  • RS Stock No. 201-5504
  • Mfr. Part No. 2800856
Each
HK$366.20
Temporarily out of stock
Hager RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type F
  • RS Stock No. 602-092
  • Mfr. Part No. ADF925F
Each
HK$3,782.80
Temporarily out of stock
ABB DDA200 RCD, 25A, 3 Pole, 500mA
  • RS Stock No. 225-6079
  • Mfr. Part No. 2CSB203101R4250 DDA203 A-25/0.5
Each
HK$1,141.64
Currently unavailable
ACS INTL SHOCK-SAFE 3AG FUSEHLDR
  • RS Stock No. 552-998
  • Mfr. Part No. 03453HS1H
1 Bag of 10
HK$534.98
Temporarily out of stock
Eaton MCB, 3P, 13A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 240-557
  • Mfr. Part No. 101334 PLI-B13/3N
Each
HK$1,125.38
Currently unavailable
Fuse 7A Slow-Blow 473/Pico® II
  • RS Stock No. 565-363
  • Mfr. Part No. 0473007.MAT1L
Each
HK$1,981.75
Temporarily out of stock
SENTRON Wire Connector for use with 3VA52 Series
  • RS Stock No. 263-754
  • Mfr. Part No. 3VA9234-0JG12
1 Kit
HK$770.80
In Stock
Eaton xEffect MCB, 1P, 12A Curve C
  • RS Stock No. 230-0953
  • Mfr. Part No. 177390 FAZ6-C12/1
Each
HK$128.20
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4015
  • Mfr. Part No. 3VA2110-8HK36-0AA0
Each
HK$9,990.40
In Stock
Eaton 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9418
  • Mfr. Part No. S506-2-R
1 Bag of 1000
HK$1,843.40
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX630 Circuit Breakers
  • RS Stock No. 260-8179
  • Mfr. Part No. C6335E630
Each
HK$29,950.14
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-501
  • Mfr. Part No. 3VA5580-7EC46-0AA0
Each
HK$57,422.50
Temporarily out of stock
ABB RCBO, 50A Current Rating, 1P Poles, Type B
  • RS Stock No. 237-1407
  • Mfr. Part No. 2CSR275151R0505
Each
HK$1,466.59
In Stock
Schneider Electric Acti9 iID RCCB, 63A, 2 Pole, 30mA, Type B-SI, 230V ac
  • RS Stock No. 655-448
  • Mfr. Part No. A9Z61263
Each
HK$25,313.33
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 4 channels
  • RS Stock No. 157-223
  • Mfr. Part No. 3VA2163-8HN42-0AA0
Each
HK$13,658.50
In Stock
Schurter 6.3A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4278
  • Mfr. Part No. 8020.5076.G
Each (In a Pack of 10)
HK$4.96
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3261
  • Mfr. Part No. 1SDA071160R1
Each
HK$169,915.07
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 2A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 202-995
  • Mfr. Part No. 2CDS274061R0277
Each
HK$6,256.65
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4023
  • Mfr. Part No. 3VA2110-8HM36-0AA0
Each
HK$13,124.30
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