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

62 of 999+
In Stock
Schneider Electric Resi9 Resi9 XE DM MCB, 1P, 6A Curve C, 230V AC, 3000 A Breaking Capacity
  • RS Stock No. 287-6044
  • Mfr. Part No. R9EFC606
Each
HK$424.00
Temporarily out of stock
RS PRO 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-413
Each (In a Pack of 10)
HK$2.66
Currently unavailable
Schneider Electric RCBO, 20A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 230-6647
  • Mfr. Part No. A9D61820
Each
HK$848.50
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2804
  • Mfr. Part No. 2909904
Each
HK$358.60
In Stock
Better World
Schneider Electric Multi 9 N40N MCB, 1+N, 16A Curve C
  • RS Stock No. 248-3871
  • Mfr. Part No. M9P22616
Each
HK$616.10
In Stock
Bulgin 6.3A Base Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 213-7586
  • Mfr. Part No. FX0360
Each (In a Pack of 5)
HK$28.48
Temporarily out of stock
Schneider Electric Resi9 R9F2 MCB, 3P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 212-209
  • Mfr. Part No. R9F28316
Each
HK$1,156.05
Temporarily out of stock
ABB Electronic Time Delay for use with E1, E1.2, E2, E2.2, E3, E4, E4.2, E6, E6.2, T7, T8, X1, XT7-XT7M
  • RS Stock No. 250-4515
  • Mfr. Part No. 1SDA038319R1
Each
HK$4,563.96
In Stock
Schurter 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 337-1989
  • Mfr. Part No. 3101.0125
Each (In a Pack of 5)
HK$53.42
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 13A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7860
  • Mfr. Part No. 2CDS252001R0131 S202-D13
Each
HK$315.20
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 232-0250
  • Mfr. Part No. 1SDA067397R1 XT1C 160 TMD 100A FF
Each
HK$2,465.80
Temporarily out of stock
Phoenix Contact Electronic Circuit Breaker
  • RS Stock No. 201-6507
  • Mfr. Part No. 2800909
Each
HK$420.10
In Stock
Littelfuse 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4195
  • Mfr. Part No. 0218.200MXP
Each (In a Pack of 10)
HK$7.29
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7766
  • Mfr. Part No. 2CDS253001R0164 S203-C16
Each
HK$536.80
Temporarily out of stock
Siemens RCCB, 40A, 4 Pole, 30mA, Type F, 400V
  • RS Stock No. 269-9760
  • Mfr. Part No. 5SV3344-3KK60
Each
HK$6,516.40
Temporarily out of stock
Siemens 10A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2007
  • Mfr. Part No. 3NA7803
Each (In a Pack of 3)
HK$48.267
In Stock
Eaton 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 852-7351
  • Mfr. Part No. ATC-15
Each
HK$9.20
In Stock
Rittal Earth Bar L. 450mm x W. 15mm x H. 5mm
  • RS Stock No. 826-2868
  • Mfr. Part No. 7113000
Each
HK$423.40
In Stock
Siemens Sentron Trip alarm switch for use with 3VA Series Circuit Breaker
  • RS Stock No. 874-4512
  • Mfr. Part No. 3VA9988-0AB11
Each
HK$293.70
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
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